code

JDBC/.gitignore

@@ -0,0 +1,38 @@
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

JDBC/.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

JDBC/.idea/dataSources.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="DataSourceManagerImpl" format="xml" multifile-model="true">
+    <data-source source="LOCAL" name="@localhost" uuid="1118f294-3737-4025-823f-a304445b31ed">
+      <driver-ref>mysql.8</driver-ref>
+      <synchronize>true</synchronize>
+      <jdbc-driver>com.mysql.cj.jdbc.Driver</jdbc-driver>
+      <jdbc-url>jdbc:mysql://localhost:3306</jdbc-url>
+      <working-dir>$ProjectFileDir$</working-dir>
+    </data-source>
+  </component>
+</project>

JDBC/.idea/encodings.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/src/main/resources" charset="UTF-8" />
+  </component>
+</project>

JDBC/.idea/misc.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

JDBC/.idea/uiDesigner.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Palette2">
+    <group name="Swing">
+      <item class="com.intellij.uiDesigner.HSpacer" tooltip-text="Horizontal Spacer" icon="/com/intellij/uiDesigner/icons/hspacer.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="1" hsize-policy="6" anchor="0" fill="1" />
+      </item>
+      <item class="com.intellij.uiDesigner.VSpacer" tooltip-text="Vertical Spacer" icon="/com/intellij/uiDesigner/icons/vspacer.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="1" anchor="0" fill="2" />
+      </item>
+      <item class="javax.swing.JPanel" icon="/com/intellij/uiDesigner/icons/panel.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JScrollPane" icon="/com/intellij/uiDesigner/icons/scrollPane.svg" removable="false" auto-create-binding="false" can-attach-label="true">
+        <default-constraints vsize-policy="7" hsize-policy="7" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JButton" icon="/com/intellij/uiDesigner/icons/button.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="0" fill="1" />
+        <initial-values>
+          <property name="text" value="Button" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JRadioButton" icon="/com/intellij/uiDesigner/icons/radioButton.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="RadioButton" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JCheckBox" icon="/com/intellij/uiDesigner/icons/checkBox.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="CheckBox" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JLabel" icon="/com/intellij/uiDesigner/icons/label.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="0" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="Label" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JTextField" icon="/com/intellij/uiDesigner/icons/textField.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JPasswordField" icon="/com/intellij/uiDesigner/icons/passwordField.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JFormattedTextField" icon="/com/intellij/uiDesigner/icons/formattedTextField.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTextArea" icon="/com/intellij/uiDesigner/icons/textArea.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTextPane" icon="/com/intellij/uiDesigner/icons/textPane.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JEditorPane" icon="/com/intellij/uiDesigner/icons/editorPane.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JComboBox" icon="/com/intellij/uiDesigner/icons/comboBox.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="2" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JTable" icon="/com/intellij/uiDesigner/icons/table.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JList" icon="/com/intellij/uiDesigner/icons/list.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="2" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTree" icon="/com/intellij/uiDesigner/icons/tree.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTabbedPane" icon="/com/intellij/uiDesigner/icons/tabbedPane.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3">
+          <preferred-size width="200" height="200" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JSplitPane" icon="/com/intellij/uiDesigner/icons/splitPane.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3">
+          <preferred-size width="200" height="200" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JSpinner" icon="/com/intellij/uiDesigner/icons/spinner.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JSlider" icon="/com/intellij/uiDesigner/icons/slider.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JSeparator" icon="/com/intellij/uiDesigner/icons/separator.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JProgressBar" icon="/com/intellij/uiDesigner/icons/progressbar.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="0" fill="1" />
+      </item>
+      <item class="javax.swing.JToolBar" icon="/com/intellij/uiDesigner/icons/toolbar.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="0" fill="1">
+          <preferred-size width="-1" height="20" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JToolBar$Separator" icon="/com/intellij/uiDesigner/icons/toolbarSeparator.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="0" anchor="0" fill="1" />
+      </item>
+      <item class="javax.swing.JScrollBar" icon="/com/intellij/uiDesigner/icons/scrollbar.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="0" anchor="0" fill="2" />
+      </item>
+    </group>
+  </component>
+</project>

JDBC/.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>

JDBC/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.example</groupId>
+    <artifactId>JDBC</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <!-- 依赖 -->
+    <dependencies>
+        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.28</version>
+        </dependency>
+
+        <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
+        <dependency>
+            <groupId>com.alibaba</groupId>
+            <artifactId>druid</artifactId>
+            <version>1.2.8</version>
+        </dependency>
+
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.13.1</version>
+            <scope>compile</scope>
+        </dependency>
+
+    </dependencies>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>17</source>
+                    <target>17</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

JDBC/src/main/java/com/lc/jdbc/TestJdbc.java

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+package com.lc.jdbc;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+
+/**
+ * ClassName: TestJdbc
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/25 10:27
+ * @Version 1.0
+ */
+public class TestJdbc {
+
+    public static void main(String[] args) throws SQLException {
+        System.out.println("Hello World!");
+
+        //第三方
+        Connection connection = DriverManager.getConnection("1", "1", "1");
+
+    }
+}

JDBC/src/main/java/com/lc/jdbc/TestJdbc1.java

@@ -0,0 +1,47 @@
+package com.lc.jdbc;
+
+import org.junit.Test;
+
+import java.sql.*;
+
+/**
+ * ClassName: TestJdbc
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/25 10:27
+ * @Version 1.0
+ */
+public class TestJdbc1 {
+
+     @Test
+     public void test01() throws Exception {
+         //加载驱动
+         Class.forName("com.mysql.cj.jdbc.Driver");
+         //建立连接
+         String user = "root";
+         String pass = "123456";
+         String url = "jdbc:mysql://127.0.0.1:3306/db2?useSSL=false";
+         //连接
+         Connection connection = DriverManager.getConnection(url, user, pass);
+         //sql执行对象
+         Statement statement = connection.createStatement();
+         //sql
+         String sql = " select * from emp ";
+         // 执行获取结果
+         ResultSet resultSet = statement.executeQuery(sql);
+         // 遍历
+         while (resultSet.next()){
+             String id = resultSet.getString("id");
+             String ename = resultSet.getString("ename");
+             String sal = resultSet.getString("salary");
+
+             System.out.println("id："+id+"name："+ename+"sal："+sal);
+         }
+
+         //关闭
+         resultSet.close();
+         statement.close();
+         connection.close();
+
+     }
+}

JDBC/src/main/java/com/lc/jdbc/TestJdbc2.java

@@ -0,0 +1,52 @@
+package com.lc.jdbc;
+
+import org.junit.Test;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.Statement;
+
+/**
+ * ClassName: TestJdbc
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/25 10:27
+ * @Version 1.0
+ */
+public class TestJdbc2 {
+
+     @Test
+     public void test01() throws Exception {
+         //加载驱动
+         Class.forName("com.mysql.cj.jdbc.Driver");
+         //建立连接
+         String user = "root";
+         String pass = "123456";
+         String url = "jdbc:mysql://127.0.0.1:3306/db2?useSSL=false";
+         //连接
+         Connection connection = DriverManager.getConnection(url, user, pass);
+
+         //sql预编译执行对象。
+         //connection.prepareStatement()
+
+         //开启事务
+         //connection.setAutoCommit(false);
+         //提交
+         //connection.commit();
+         //回滚
+         //connection.rollback();
+
+         Statement statement = connection.createStatement();
+
+
+         ResultSet resultSet = statement.executeQuery("");
+
+
+         boolean next = resultSet.next();
+
+
+
+
+     }
+}

JDBC/src/main/java/com/lc/jdbc/TestJdbc3.java

@@ -0,0 +1,63 @@
+package com.lc.jdbc;
+
+import org.junit.Test;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.Statement;
+
+/**
+ * ClassName: TestJdbc
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/25 10:27
+ * @Version 1.0
+ */
+public class TestJdbc3 {
+
+     @Test
+     public void test01() throws Exception {
+         //加载驱动
+         Class.forName("com.mysql.cj.jdbc.Driver");
+         //建立连接
+         String user = "root";
+         String pass = "123456";
+         String url = "jdbc:mysql://127.0.0.1:3306/db2?useSSL=false";
+         //连接
+         Connection connection = DriverManager.getConnection(url, user, pass);
+         // 事务
+         connection.setAutoCommit(false);
+         Statement statement = connection.createStatement();
+         //案例
+         // 悟空 给 卢俊义  转  1000.
+
+         try {
+             // 给悟空  - 1000
+             String sql1 = " update emp set salary = salary - 1000 WHERE id = 1001; ";
+             statement.execute(sql1);
+
+             // 异常
+             int i = 1 / 0;
+
+             //  俊义   + 1000
+             String sql2 = " update emp set salary = salary + 1000 WHERE id = 1002; ";
+             statement.execute(sql2);
+
+             //执行成功
+             connection.commit();
+             //转账成功
+             System.out.println("转账成功");
+         } catch (Exception e) {
+             e.printStackTrace();
+             //回滚
+             connection.rollback();
+             //转账失败
+             System.out.println("转账失败");
+         }
+         //释放
+         statement.close();
+         connection.close();
+
+     }
+}

JDBC/src/main/java/com/lc/jdbc/TestJdbc4.java

@@ -0,0 +1,76 @@
+package com.lc.jdbc;
+
+import org.junit.Test;
+
+import java.sql.*;
+import java.util.Collections;
+
+/**
+ * ClassName: TestJdbc
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/25 10:27
+ * @Version 1.0
+ */
+public class TestJdbc4 {
+
+     @Test
+     public void test01() throws Exception {
+         //加载驱动
+         Class.forName("com.mysql.cj.jdbc.Driver");
+         //建立连接
+         String user = "root";
+         String pass = "123456";
+         String url = "jdbc:mysql://127.0.0.1:3306/db2?useSSL=false";
+         //连接
+         Connection connection = DriverManager.getConnection(url, user, pass);
+
+         //转账
+         transfer("abc","1002",100,connection);
+
+         //释放
+         connection.close();
+
+     }
+
+
+     //转账方法
+    public  boolean transfer(String fromId, String toId, int money , Connection conn) throws SQLException {
+        // 事务
+        conn.setAutoCommit(false);
+        //改变 sql执行对象 PreparedStatement 变为字符串
+        try {
+            String sql1 = " update emp set salary = salary - ? WHERE id = ? ; ";
+            //预编译
+            PreparedStatement preparedStatement1 = conn.prepareStatement(sql1);
+            //设置参数
+            preparedStatement1.setInt(1,money);
+            preparedStatement1.setString(2,fromId);
+            //执行
+            preparedStatement1.execute();
+            //声明sql
+            //参数 使用 ?
+            String sql2 = " update emp set salary = salary + ? WHERE id = ? ; ";
+            PreparedStatement preparedStatement2 = conn.prepareStatement(sql1);
+
+            //设置参数  第一个参数是索引 从1开始 第几个?  第二个参数是值。
+            //setXxx 类型
+            preparedStatement2.setInt(1,money);
+            preparedStatement2.setString(2,toId);
+            //执行
+            preparedStatement2.execute();
+            //提交
+            conn.commit();
+            //转账成功
+            System.out.println("转账成功");
+            return true;
+        } catch (SQLException ex) {
+            ex.printStackTrace();
+            //回滚
+            conn.rollback();
+            //转账失败
+            System.out.println("转账失败");
+            return false;
+        }
+    };
+}

JDBC/src/main/java/com/lc/jdbc1/Emp.java

@@ -0,0 +1,92 @@
+package com.lc.jdbc1;
+
+import java.util.Date;
+
+/**
+ * ClassName: Emp
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/25 15:50
+ * @Version 1.0
+ */
+public class Emp {
+    private Integer id;
+    private String ename;
+    private Integer mgr;
+    private Date joindate;
+    private Integer salary;
+    private Integer bonus;
+
+
+    public Emp() {
+    }
+
+    public Emp(Integer id, String ename, Integer mgr, Date joindate, Integer salary, Integer bonus) {
+        this.id = id;
+        this.ename = ename;
+        this.mgr = mgr;
+        this.joindate = joindate;
+        this.salary = salary;
+        this.bonus = bonus;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getEname() {
+        return ename;
+    }
+
+    public void setEname(String ename) {
+        this.ename = ename;
+    }
+
+    public Integer getMgr() {
+        return mgr;
+    }
+
+    public void setMgr(Integer mgr) {
+        this.mgr = mgr;
+    }
+
+    public Date getJoindate() {
+        return joindate;
+    }
+
+    public void setJoindate(Date joindate) {
+        this.joindate = joindate;
+    }
+
+    public Integer getSalary() {
+        return salary;
+    }
+
+    public void setSalary(Integer salary) {
+        this.salary = salary;
+    }
+
+    public Integer getBonus() {
+        return bonus;
+    }
+
+    public void setBonus(Integer bonus) {
+        this.bonus = bonus;
+    }
+
+    @Override
+    public String toString() {
+        return "Emp{" +
+                "id=" + id +
+                ", ename='" + ename + '\'' +
+                ", mgr='" + mgr + '\'' +
+                ", joindate=" + joindate +
+                ", salary=" + salary +
+                ", bonus=" + bonus +
+                '}';
+    }
+}

JDBC/src/main/java/com/lc/jdbc1/EmpDao.java

@@ -0,0 +1,128 @@
+package com.lc.jdbc1;
+
+import java.sql.*;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+/**
+ * ClassName: EmpDao
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/25 15:54
+ * @Version 1.0
+ */
+public class EmpDao {
+    static Connection connection = null;
+    static  {
+        //建立连接
+        String user = "root";
+        String pass = "123456";
+        String url = "jdbc:mysql://127.0.0.1:3306/db2?useSSL=false";
+        //连接
+        try {
+            connection = DriverManager.getConnection(url, user, pass);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+
+    public List<Emp> getAll() throws Exception{
+
+        String sql = " select * from emp ";
+        //预编译
+        PreparedStatement statement = connection.prepareStatement(sql);
+
+        ResultSet resultSet = statement.executeQuery();
+
+        List<Emp> list = new ArrayList<>();
+        while(resultSet.next()){
+            Emp emp = new Emp();
+            emp.setId(resultSet.getInt("id"));
+            emp.setEname(resultSet.getString("ename"));
+            emp.setJoindate(resultSet.getDate("joindate"));
+            emp.setMgr(resultSet.getInt("mgr"));
+            emp.setBonus(resultSet.getInt("bonus"));
+            list.add(emp);
+        }
+        return list;
+    }
+
+    public Emp get(Integer id) throws Exception{
+
+        String sql = " select * from emp where id = ? ";
+        //预编译
+        PreparedStatement statement = connection.prepareStatement(sql);
+        //设置参数
+        statement.setInt(1, id);
+
+        ResultSet resultSet = statement.executeQuery();
+
+        Emp emp = new Emp();
+        while(resultSet.next()){
+            emp.setId(resultSet.getInt("id"));
+            emp.setEname(resultSet.getString("ename"));
+            emp.setJoindate(resultSet.getDate("joindate"));
+            emp.setMgr(resultSet.getInt("mgr"));
+            emp.setBonus(resultSet.getInt("bonus"));
+        }
+        return emp;
+    }
+
+
+
+    public boolean del(Integer id) throws Exception{
+
+        String sql = "  delete from emp where id = ? ";
+        //预编译
+        PreparedStatement statement = connection.prepareStatement(sql);
+        //设置参数
+        statement.setInt(1, id);
+
+        //执行 返回的是受影响记录数
+        return statement.executeUpdate() > 0;
+    }
+
+
+    public boolean add(Emp emp) throws Exception{
+
+        String sql = " INSERT INTO `db2`.`emp` " +
+                "( `ename`, `mgr`, `joindate`, `salary`, `bonus`,`id`) " +
+                "VALUES (?,?,?,?,?,?); ";
+        //预编译
+        PreparedStatement statement = connection.prepareStatement(sql);
+        //设置参数
+        statement.setString(1, emp.getEname());
+        statement.setInt(2, emp.getMgr());
+        //sql时间
+        Date date = new Date();
+        statement.setDate(3, new java.sql.Date(date.getTime()));
+        statement.setInt(4, emp.getSalary());
+        statement.setInt(5, emp.getBonus());
+        statement.setInt(6, emp.getId());
+
+        return statement.execute();
+    }
+
+    public boolean update(Emp emp) throws Exception{
+
+        String sql = " UPDATE `db2`.`emp` " +
+                "SET `ename` = ?,  `mgr` = ?, `joindate` = ?, `salary` = ?, `bonus` = ?  WHERE `id` = ? ";
+        //预编译
+        PreparedStatement statement = connection.prepareStatement(sql);
+        //设置参数
+        statement.setString(1, emp.getEname());
+        statement.setInt(2, emp.getMgr());
+        //sql时间
+        Date date = new Date();
+        statement.setDate(3, new java.sql.Date(date.getTime()));
+        statement.setInt(4, emp.getSalary());
+        statement.setInt(5, emp.getBonus());
+        statement.setInt(6, emp.getId());
+
+        //执行 返回的是受影响记录数
+        return statement.executeUpdate() > 0;
+    }
+
+}

JDBC/src/main/java/com/lc/jdbc1/Test01.java

@@ -0,0 +1,86 @@
+package com.lc.jdbc1;
+
+import org.junit.Test;
+
+import java.util.Date;
+import java.util.List;
+
+/**
+ * ClassName: Test01
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/25 16:01
+ * @Version 1.0
+ */
+public class Test01 {
+
+    @Test
+    public void test05() throws Exception {
+        EmpDao empDao = new EmpDao();
+        List<Emp> all = empDao.getAll();
+        all.forEach(System.out::println);
+    }
+
+    @Test
+    public void test04() throws Exception {
+        EmpDao empDao = new EmpDao();
+        Emp emp = empDao.get(1);
+        System.out.println(emp);
+    }
+
+    @Test
+    public void test03() throws Exception {
+        EmpDao empDao = new EmpDao();
+        boolean del = empDao.del(1001);
+        if (del){
+            System.out.println("成功");
+        }else {
+            System.out.println("失败");
+        }
+    }
+
+
+    @Test
+    public void test02() throws Exception {
+        EmpDao empDao = new EmpDao();
+
+        Emp emp = new Emp();
+        emp.setId(1002);
+        emp.setEname("fanfan");
+        emp.setMgr(1);
+        emp.setJoindate(new Date());
+        emp.setSalary(12000);
+        emp.setBonus(100);
+
+        boolean add = empDao.update(emp);
+        if (add){
+            System.out.println("成功");
+        }else {
+            System.out.println("失败");
+        }
+    }
+
+
+    @Test
+    public void test01() throws Exception {
+        EmpDao empDao = new EmpDao();
+
+        Emp emp = new Emp();
+        emp.setId(1);
+        emp.setEname("kunkun");
+        emp.setMgr(0);
+        emp.setJoindate(new Date());
+        emp.setSalary(10000);
+        emp.setBonus(1000);
+
+        boolean add = empDao.add(emp);
+        if (add){
+            System.out.println("成功");
+        }else {
+            System.out.println("失败");
+        }
+    }
+
+
+
+}

JDBC/src/main/java/com/lc/jdbc2/Emp.java

@@ -0,0 +1,92 @@
+package com.lc.jdbc2;
+
+import java.util.Date;
+
+/**
+ * ClassName: Emp
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/25 15:50
+ * @Version 1.0
+ */
+public class Emp {
+    private Integer id;
+    private String ename;
+    private Integer mgr;
+    private Date joindate;
+    private Integer salary;
+    private Integer bonus;
+
+
+    public Emp() {
+    }
+
+    public Emp(Integer id, String ename, Integer mgr, Date joindate, Integer salary, Integer bonus) {
+        this.id = id;
+        this.ename = ename;
+        this.mgr = mgr;
+        this.joindate = joindate;
+        this.salary = salary;
+        this.bonus = bonus;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getEname() {
+        return ename;
+    }
+
+    public void setEname(String ename) {
+        this.ename = ename;
+    }
+
+    public Integer getMgr() {
+        return mgr;
+    }
+
+    public void setMgr(Integer mgr) {
+        this.mgr = mgr;
+    }
+
+    public Date getJoindate() {
+        return joindate;
+    }
+
+    public void setJoindate(Date joindate) {
+        this.joindate = joindate;
+    }
+
+    public Integer getSalary() {
+        return salary;
+    }
+
+    public void setSalary(Integer salary) {
+        this.salary = salary;
+    }
+
+    public Integer getBonus() {
+        return bonus;
+    }
+
+    public void setBonus(Integer bonus) {
+        this.bonus = bonus;
+    }
+
+    @Override
+    public String toString() {
+        return "Emp{" +
+                "id=" + id +
+                ", ename='" + ename + '\'' +
+                ", mgr='" + mgr + '\'' +
+                ", joindate=" + joindate +
+                ", salary=" + salary +
+                ", bonus=" + bonus +
+                '}';
+    }
+}

JDBC/src/main/java/com/lc/jdbc2/EmpDao.java

@@ -0,0 +1,52 @@
+package com.lc.jdbc2;
+
+import com.lc.utils.DButils;
+
+import java.sql.*;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+/**
+ * ClassName: EmpDao
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/25 15:54
+ * @Version 1.0
+ */
+public class EmpDao {
+    static Connection connection = null;
+    //获取连接
+    static {
+        //获取连接
+        try {
+            connection  = DButils.getConnection();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public List<Emp> getAll() throws Exception{
+
+
+        String sql = " select * from emp ";
+        //预编译
+        PreparedStatement statement = connection.prepareStatement(sql);
+
+        ResultSet resultSet = statement.executeQuery();
+
+        List<Emp> list = new ArrayList<>();
+        while(resultSet.next()){
+            Emp emp = new Emp();
+            emp.setId(resultSet.getInt("id"));
+            emp.setEname(resultSet.getString("ename"));
+            emp.setJoindate(resultSet.getDate("joindate"));
+            emp.setMgr(resultSet.getInt("mgr"));
+            emp.setBonus(resultSet.getInt("bonus"));
+            list.add(emp);
+        }
+        return list;
+    }
+
+
+}

JDBC/src/main/java/com/lc/jdbc2/Test01.java

@@ -0,0 +1,48 @@
+package com.lc.jdbc2;
+
+import com.alibaba.druid.pool.DruidDataSourceFactory;
+import org.junit.Test;
+
+import javax.sql.DataSource;
+import java.sql.Connection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * ClassName: Test01
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 10:04
+ * @Version 1.0
+ */
+public class Test01 {
+
+    @Test
+    public void test01() throws Exception {
+        // 数据源信息
+        Map<String,String> dataSourse = new HashMap<>();
+
+        dataSourse.put("username","root");
+        dataSourse.put("password","123456");
+        dataSourse.put("url","jdbc:mysql://127.0.0.1:3306/db2?useSSL=false");
+
+        // 创建数据源
+        DataSource dataSource = DruidDataSourceFactory.createDataSource(dataSourse);
+
+        // 获取连接
+        Connection connection = dataSource.getConnection();
+
+        System.out.println(connection);
+    }
+
+
+    @Test
+    public void test02() throws Exception {
+        EmpDao empDao = new EmpDao();
+
+        List<Emp> all = empDao.getAll();
+        System.out.println(all);
+    }
+
+}

JDBC/src/main/java/com/lc/jdbc3/Column.java

@@ -0,0 +1,23 @@
+package com.lc.jdbc3;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * ClassName: Column
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 11:27
+ * @Version 1.0
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.FIELD)
+public @interface Column {
+
+    String property() default "";
+
+    String filed();
+
+}

JDBC/src/main/java/com/lc/jdbc3/Table.java

@@ -0,0 +1,24 @@
+package com.lc.jdbc3;
+
+import org.junit.Test;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * ClassName: Table
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 11:23
+ * @Version 1.0
+ */
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE})
+public @interface Table {
+
+    //抽象方法
+    String value() default "";
+}

JDBC/src/main/java/com/lc/jdbc3/Test01.java

@@ -0,0 +1,82 @@
+package com.lc.jdbc3;
+
+import com.lc.utils.DButils;
+import org.junit.Test;
+
+import java.lang.reflect.Field;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+/**
+ * ClassName: Test01
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 11:31
+ * @Version 1.0
+ */
+public class Test01 {
+
+
+    @Test
+    public void test01() throws SQLException {
+        //class
+        Class<User> clazz = User.class;
+
+        String sql = " select ";
+
+        //判断是否有 Table
+        boolean annotationPresent = clazz.isAnnotationPresent(Table.class);
+        if (annotationPresent){
+
+            //获取字段
+            Field[] fields = clazz.getDeclaredFields();
+
+            for (Field field : fields) {
+
+                boolean anno = field.isAnnotationPresent(Column.class);
+
+                if (anno){
+                    //有注解
+                    Column annotation = field.getAnnotation(Column.class);
+                    String annoFiled = annotation.filed();
+
+                    sql+= annoFiled + " , ";
+                }else{
+                    //没有注解
+                    String filedName = field.getName();
+                    sql+= filedName + " , ";
+                }
+            }
+            sql+= " 1 ";
+
+            sql+= " from ";
+
+            //获取注解
+            Table annotation = clazz.getAnnotation(Table.class);
+            // 表名 value
+            String tUser = annotation.value();
+
+            sql += tUser + " ";
+        }
+
+        //执行 sql语句
+        System.out.println(sql);
+
+        //连接 DButils
+        Connection connection = DButils.getConnection();
+
+        PreparedStatement preparedStatement = connection.prepareStatement(sql);
+
+        ResultSet resultSet = preparedStatement.executeQuery();
+
+        while (resultSet.next()){
+            System.out.println(resultSet.getString("name"));
+        }
+
+        connection.close();
+
+    }
+
+}

JDBC/src/main/java/com/lc/jdbc3/User.java

@@ -0,0 +1,76 @@
+package com.lc.jdbc3;
+
+/**
+ * ClassName: User
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 11:17
+ * @Version 1.0
+ */
+
+//@Table(value = "t_user")
+@Table("t_user")
+public class User {
+
+    private Integer id;
+    private String name;
+    private Integer age;
+    private String address;
+
+    @Column( property = "loginName", filed = "login_name")
+    private String loginName;
+
+    // 省略getter和setter方法
+
+
+    public String getLoginName() {
+        return loginName;
+    }
+
+    public void setLoginName(String loginName) {
+        this.loginName = loginName;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Integer getAge() {
+        return age;
+    }
+
+    public void setAge(Integer age) {
+        this.age = age;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(String address) {
+        this.address = address;
+    }
+
+
+    @Override
+    public String toString() {
+        return "User{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", age=" + age +
+                ", address='" + address + '\'' +
+                '}';
+    }
+}

JDBC/src/main/java/com/lc/jdbc4/Column.java

@@ -0,0 +1,23 @@
+package com.lc.jdbc4;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * ClassName: Column
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 11:27
+ * @Version 1.0
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.FIELD)
+public @interface Column {
+
+    String property() default "";
+
+    String filed();
+
+}

JDBC/src/main/java/com/lc/jdbc4/Emp.java

@@ -0,0 +1,85 @@
+package com.lc.jdbc4;
+
+import java.util.Date;
+
+/**
+ * ClassName: Emp
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/25 15:50
+ * @Version 1.0
+ */
+@Table("emp")
+public class Emp {
+    private Integer id;
+    private String ename;
+    private Integer mgr;
+    private Date joindate;
+    private Double salary;
+    private Double bonus;
+
+
+    public Emp() {
+    }
+
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getEname() {
+        return ename;
+    }
+
+    public void setEname(String ename) {
+        this.ename = ename;
+    }
+
+    public Integer getMgr() {
+        return mgr;
+    }
+
+    public void setMgr(Integer mgr) {
+        this.mgr = mgr;
+    }
+
+    public Date getJoindate() {
+        return joindate;
+    }
+
+    public void setJoindate(Date joindate) {
+        this.joindate = joindate;
+    }
+
+    public Double getSalary() {
+        return salary;
+    }
+
+    public void setSalary(Double salary) {
+        this.salary = salary;
+    }
+
+    public Double getBonus() {
+        return bonus;
+    }
+
+    public void setBonus(Double bonus) {
+        this.bonus = bonus;
+    }
+
+    @Override
+    public String toString() {
+        return "Emp{" +
+                "id=" + id +
+                ", ename='" + ename + '\'' +
+                ", mgr='" + mgr + '\'' +
+                ", joindate=" + joindate +
+                ", salary=" + salary +
+                ", bonus=" + bonus +
+                '}';
+    }
+}

JDBC/src/main/java/com/lc/jdbc4/EmpDao.java

@@ -0,0 +1,13 @@
+package com.lc.jdbc4;
+
+import com.lc.utils.BaseDAO;
+
+/**
+ * ClassName: EmpDao
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 15:07
+ * @Version 1.0
+ */
+public class EmpDao extends BaseDAO<Emp> {
+}

JDBC/src/main/java/com/lc/jdbc4/Table.java

@@ -0,0 +1,22 @@
+package com.lc.jdbc4;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * ClassName: Table
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 11:23
+ * @Version 1.0
+ */
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE})
+public @interface Table {
+
+    //抽象方法
+    String value() default "";
+}

JDBC/src/main/java/com/lc/jdbc4/Test01.java

@@ -0,0 +1,47 @@
+package com.lc.jdbc4;
+
+import org.junit.Test;
+
+import java.sql.SQLException;
+import java.util.List;
+
+/**
+ * ClassName: Test01
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 14:36
+ * @Version 1.0
+ */
+public class Test01 {
+
+    @Test
+    public void test01()  {
+        UserDao userDao = new UserDao();
+        //id获取
+        List<User> all = userDao.getAll();
+
+        System.out.println(all);
+    }
+
+    @Test
+    public void test02()  {
+        EmpDao empDao = new EmpDao();
+        //id获取
+        List<Emp> all = empDao.getAll();
+
+        System.out.println(all);
+    }
+
+
+
+    @Test
+    public void test03() throws Exception {
+        UserDao userDao = new UserDao();
+        User user = new User();
+        user.setName("ls");
+        user.setAge(18);
+        user.setLoginName("ls");
+        userDao.insert(user);
+        System.out.println("插入成功");
+    }
+}

JDBC/src/main/java/com/lc/jdbc4/User.java

@@ -0,0 +1,77 @@
+package com.lc.jdbc4;
+
+/**
+ * ClassName: User
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 11:17
+ * @Version 1.0
+ */
+
+//@Table(value = "t_user")
+@Table("t_user")
+public class User {
+
+    private Integer id;
+    private String name;
+    private Integer age;
+    private String address;
+
+    @Column( property = "loginName", filed = "login_name")
+    private String loginName;
+
+    // 省略getter和setter方法
+
+
+    public String getLoginName() {
+        return loginName;
+    }
+
+    public void setLoginName(String loginName) {
+        this.loginName = loginName;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Integer getAge() {
+        return age;
+    }
+
+    public void setAge(Integer age) {
+        this.age = age;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(String address) {
+        this.address = address;
+    }
+
+
+    @Override
+    public String toString() {
+        return "User{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", age=" + age +
+                ", address='" + address + '\'' +
+                ", loginName='" + loginName + '\'' +
+                '}';
+    }
+}

JDBC/src/main/java/com/lc/jdbc4/UserDao.java

@@ -0,0 +1,14 @@
+package com.lc.jdbc4;
+
+import com.lc.utils.BaseDAO;
+
+/**
+ * ClassName: UserDao
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 14:35
+ * @Version 1.0
+ */
+public class UserDao extends BaseDAO<User> {
+
+}

JDBC/src/main/java/com/lc/jdbc5/Column.java

@@ -0,0 +1,23 @@
+package com.lc.jdbc5;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * ClassName: Column
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 11:27
+ * @Version 1.0
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.FIELD)
+public @interface Column {
+
+    String property() default "";
+
+    String filed();
+
+}

JDBC/src/main/java/com/lc/jdbc5/EmpDao.java

@@ -0,0 +1,14 @@
+package com.lc.jdbc5;
+
+import com.lc.jdbc4.Emp;
+import com.lc.utils.BaseDAO;
+
+/**
+ * ClassName: EmpDao
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 15:07
+ * @Version 1.0
+ */
+public class EmpDao extends BaseDAO<Emp> {
+}

JDBC/src/main/java/com/lc/jdbc5/Person.java

@@ -0,0 +1,39 @@
+package com.lc.jdbc5;
+
+
+/**
+ * ClassName: Person
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 16:06
+ * @Version 1.0
+ */
+@Table("t_person")
+public class Person {
+    private Integer id;
+    private String name;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public String toString() {
+        return "Person{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                '}';
+    }
+}

JDBC/src/main/java/com/lc/jdbc5/PersonDao.java

@@ -0,0 +1,14 @@
+package com.lc.jdbc5;
+
+import com.lc.utils.BaseDAO;
+
+/**
+ * ClassName: PersonDao
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 16:07
+ * @Version 1.0
+ */
+public class PersonDao extends BaseDAO<Person> {
+
+}

JDBC/src/main/java/com/lc/jdbc5/Table.java

@@ -0,0 +1,21 @@
+package com.lc.jdbc5;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * ClassName: Table
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 11:23
+ * @Version 1.0
+ */
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE})
+public @interface Table {
+    //抽象方法
+    String value() default "";
+}

JDBC/src/main/java/com/lc/jdbc5/Test01.java

@@ -0,0 +1,62 @@
+package com.lc.jdbc5;
+
+import org.junit.Test;
+
+import java.util.List;
+
+/**
+ * ClassName: Test01
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 16:08
+ * @Version 1.0
+ */
+public class Test01 {
+    @Test
+    public void test01() throws Exception {
+        PersonDao personDao = new PersonDao();
+        Person person = new Person();
+        person.setId(2);
+        person.setName("ffff");
+
+        int insert = personDao.insert(person);
+
+    }
+
+    @Test
+    public void test02(){
+        PersonDao personDao = new PersonDao();
+
+        List<Person> all = personDao.getAll();
+
+        System.out.println(all);
+    }
+
+    @Test
+    public void test03() throws Exception {
+        PersonDao personDao = new PersonDao();
+
+        int del = personDao.del(1);
+
+    }
+
+    @Test
+    public void test04() throws Exception {
+        PersonDao personDao = new PersonDao();
+
+        Person id = personDao.getId(2);
+        System.out.println(id);
+    }
+
+    @Test
+    public void test05() throws Exception {
+        PersonDao personDao = new PersonDao();
+        Person person = new Person();
+        person.setId(2);
+        person.setName("aaa");
+        int update = personDao.update(person);
+        System.out.println(update);
+    }
+
+
+}

JDBC/src/main/java/com/lc/utils/BaseDAO.java

@@ -0,0 +1,224 @@
+package com.lc.utils;
+
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+
+import com.lc.jdbc5.*;
+
+
+/**
+ * ClassName: BaseDao
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 14:30
+ * @Version 1.0
+ */
+public class BaseDAO<T> {
+
+    static Connection connection = null;
+    //获取连接
+    static {
+        //获取连接
+        try {
+            connection  = DButils.getConnection();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public int insert(T t) throws Exception {
+        Class<T> clazz = (Class<T>) t.getClass();
+
+        String sql = "insert into " + getTableName(clazz) + "( "+getFiledSql(clazz)+" ) values ( ";
+
+        Field[] declaredFields = clazz.getDeclaredFields();
+        int length = declaredFields.length;
+        for (int i = 0; i < length; i++) {
+            if (i== length - 1){
+                sql+= " ?  );";
+            }else{
+                sql+= " ?,";
+            }
+        }
+
+        PreparedStatement preparedStatement = connection.prepareStatement(sql);
+
+        for (int i = 1; i <= declaredFields.length; i++) {
+            declaredFields[i-1].setAccessible(true);
+
+            preparedStatement.setObject(i,declaredFields[i-1].get(t));
+        }
+
+        return preparedStatement.executeUpdate();
+    }
+
+    public int update(T t) throws Exception {
+        Class<T> clazz = (Class<T>) t.getClass();
+
+        String sql = " update " + getTableName(clazz) + " set ";
+
+        Field[] declaredFields = clazz.getDeclaredFields();
+
+        for (Field declaredField : declaredFields) {
+            String filedName = filedName(declaredField);
+            if (!declaredField.getName().equals("id")){
+                sql+= " " + filedName + " = ? , ";
+            }
+        }
+        sql = sql.substring(0, sql.length() - 2); // 去除最后一个逗号和空格
+
+        sql+= " where id = ?  ";
+        
+        PreparedStatement preparedStatement = connection.prepareStatement(sql);
+
+        int index = 0;
+        for (Field declaredField : declaredFields) {
+            if (!declaredField.getName().equals("id")){
+                declaredField.setAccessible(true);
+                preparedStatement.setObject(index,declaredField.get(t));
+            }
+            index++;
+        }
+        Field id = clazz.getDeclaredField("id");
+        id.setAccessible(true);
+        preparedStatement.setObject(index++,id.get(t));
+
+        return preparedStatement.executeUpdate();
+    }
+
+    public int del(int id) throws Exception {
+        Class<T> clazzClass = getClazzClass();
+        String sql = " delete from " + getTableName(clazzClass) + " where id = ? ";
+        PreparedStatement preparedStatement = connection.prepareStatement(sql);
+        preparedStatement.setObject(1,id);
+        return preparedStatement.executeUpdate();
+    }
+
+    public List<T> getAll()  {
+        //this 子类
+        try {
+            Class<T> clazz = getClazzClass();
+            //sql
+            String sql = "select " + getFiledSql(clazz) + " from " + getTableName(clazz);
+
+            //连接 DButils
+            Connection connection = DButils.getConnection();
+            PreparedStatement preparedStatement = connection.prepareStatement(sql);
+            //结果
+            ResultSet rs = preparedStatement.executeQuery();
+
+            List<T> list = new ArrayList<>();
+
+            while (rs.next()){
+                Constructor<T> constructor = clazz.getConstructor();
+                T t = constructor.newInstance();
+                //反射完成赋值
+                Field[] declaredFields = clazz.getDeclaredFields();
+                for (Field declaredField : declaredFields) {
+                    declaredField.setAccessible(true);
+                    declaredField.set(t,rs.getObject(filedName(declaredField)));
+                }
+                list.add(t);
+            }
+
+            return  list;
+
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public T getId(int id)  {
+        //this 子类
+        try {
+            Class<T> clazz = getClazzClass();
+
+            //sql
+            String sql = "select " + getFiledSql(clazz) + " from " + getTableName(clazz) + " where id = ? ";
+
+            //连接 DButils
+            Connection connection = DButils.getConnection();
+            PreparedStatement preparedStatement = connection.prepareStatement(sql);
+            //设置参数
+            preparedStatement.setInt(1,id);
+            //结果
+            ResultSet rs = preparedStatement.executeQuery();
+            //反射
+            return  getT(rs, clazz);
+
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+
+    public T getT(ResultSet rs , Class<T> clazz) throws Exception{
+
+        Constructor<T> constructor = clazz.getConstructor();
+        T t = constructor.newInstance();
+
+        while (rs.next()){
+            //反射完成赋值
+            Field[] declaredFields = clazz.getDeclaredFields();
+            for (Field declaredField : declaredFields) {
+                declaredField.setAccessible(true);
+                declaredField.setAccessible(true);
+                declaredField.set(t,rs.getObject(filedName(declaredField)));
+            }
+        }
+        return t;
+
+    }
+
+    private String getTableName(Class<T> clazz) {
+        //获取表名
+        if (clazz.isAnnotationPresent(Table.class)){
+            return clazz.getAnnotation(Table.class).value();
+        }else {
+            return clazz.getSimpleName();
+        }
+    }
+
+    private String getFiledSql(Class<T> clazz){
+        String filedSql = "";
+        //获取字段
+        Field[] fields = clazz.getDeclaredFields();
+        for (Field field : fields) {
+            //获取字段名
+            filedSql += filedName(field) + " , ";
+        }
+        filedSql = filedSql.substring(0,filedSql.lastIndexOf(","));
+
+        return filedSql;
+    }
+
+    public String filedName(Field field){
+        if (field.isAnnotationPresent(Column.class)){
+            //有注解
+            return field.getAnnotation(Column.class).filed();
+        }else{
+            //没有注解
+           return field.getName();
+        }
+    }
+
+    public Class<T> getClazzClass() throws ClassNotFoundException {
+        Class clazz = this.getClass();
+        //获取父类泛型类型
+        ParameterizedType genericSuperclass = (ParameterizedType) clazz.getGenericSuperclass();
+        //泛型
+        Type cla = genericSuperclass.getActualTypeArguments()[0];
+        //javabean的class
+        Class<T> typeClazz = (Class<T>) Class.forName(cla.getTypeName());
+        return typeClazz;
+    }
+}

JDBC/src/main/java/com/lc/utils/DButils.java

@@ -0,0 +1,56 @@
+package com.lc.utils;
+
+import com.alibaba.druid.pool.DruidDataSourceFactory;
+
+import javax.sql.DataSource;
+import java.io.InputStream;
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.util.Properties;
+
+/**
+ * ClassName: DButils
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/28 10:27
+ * @Version 1.0
+ */
+public class DButils {
+
+    private static DataSource dataSource= null;
+
+    //使用
+    static {
+        try {
+            //Properties
+            Properties properties = new Properties();
+            // 数据源信息
+            InputStream dataSourse = DButils.class.getClassLoader().getResourceAsStream("jdbc.properties");
+            //加载配置文件配置文件
+            properties.load(dataSourse);
+            // 创建数据源
+            dataSource = DruidDataSourceFactory.createDataSource(properties);
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    /*
+       获取连接
+     */
+    public static Connection getConnection() throws SQLException {
+
+        return dataSource.getConnection();
+    }
+
+    /*
+   获取连接
+ */
+    public static DataSource getDataSource() throws SQLException {
+        //单例
+        return dataSource;
+    }
+
+
+}

JDBC/src/main/resources/jdbc.properties

@@ -0,0 +1,10 @@
+driverClassName=com.mysql.jdbc.Driver
+url=jdbc:mysql:///db2?useSSL=false&useServerPrepStmts=true
+username=root
+password=123456
+# ???????
+initialSize=5
+# ?????
+maxActive=10
+# ??????
+maxWait=3000

JavaSE/day14/day14.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

JavaSE/day14/src/com/lc/day14/coll01/TestColl.java

@@ -0,0 +1,86 @@
+package com.lc.day14.coll01;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.function.Predicate;
+
+/**
+ * ClassName: TestColl
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/10 10:12
+ * @Version 1.0
+ */
+public class TestColl {
+
+    /*
+     * `public boolean add(E e)`：  把给定的对象添加到当前集合中 。
+     * `public void clear()` :清空集合中所有的元素。
+     * `public boolean remove(E e)`: 把给定的对象在当前集合中删除。
+     * `public boolean contains(Object obj)`: 判断当前集合中是否包含给定的对象。
+     * `public boolean isEmpty()`: 判断当前集合是否为空。
+     * `public int size()`: 返回集合中元素的个数。
+     * `public Object[] toArray()`: 把集合中的元素，存储到数组中
+     * default boolean removeIf(Predicate<? super E> filter) 删除此集合中满足给定谓词的所有元素。
+     */
+    public static void main(String[] args) {
+        //容器
+        Collection coll = new ArrayList();
+
+        coll.add(456);
+        coll.add("123");
+        coll.add(new Object()); // 4eec7777
+        coll.add(new Double(1.0));
+        coll.add("zs");
+
+        System.out.println(coll);
+
+        //clear
+        //coll.clear();
+        //System.out.println(coll);
+
+        //remove
+        boolean remove = coll.remove("zs");
+        System.out.println(coll);
+
+//        Object o = new Object();
+//        System.out.println(o); //41629346
+//        coll.remove(o);
+//        System.out.println(coll); //
+
+        //contains
+        boolean contains = coll.contains(123);
+        System.out.println(contains);
+
+        //isEmpty
+        boolean empty = coll.isEmpty();
+        System.out.println(empty);
+
+        //size
+        System.out.println(coll.size());
+
+        //toArray
+        Object[] array = coll.toArray();
+
+        for (int i = 0; i < array.length; i++) {
+            System.out.println(array[i]);
+        }
+
+        //removeIf(Predicate<? super E> filter)
+        //Predicate 判断
+        //boolean test(T t); 返回true 删除 或者 false 不删除 传入实现规则
+
+
+        coll.removeIf(new Predicate() {
+            @Override
+            public boolean test(Object object) {
+                if (object.equals("123")){
+                    return true;
+                }
+                return false;
+            }
+        });
+
+        System.out.println(coll);
+    }
+}

JavaSE/day14/src/com/lc/day14/coll02/Test02.java

@@ -0,0 +1,57 @@
+package com.lc.day14.coll02;
+
+import com.lc.day14.ex2.Student;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.function.Predicate;
+
+/**
+ * ClassName: Test02
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/10 11:31
+ * @Version 1.0
+ */
+public class Test02 {
+
+    public static void main(String[] args) {
+        //泛型 指定泛型 只能添加指定的泛型类型
+        //将运行期问题在编译器解决
+        Collection<String> list = new ArrayList<>();
+
+        list.add("1");
+        list.add("2");
+        list.add("3");
+        list.add("4");
+        list.add("5");
+
+        //迭代器
+        Iterator<String> iterator = list.iterator();
+
+        // hasNext 判断  next  获取
+        while (iterator.hasNext()){
+            String s = iterator.next();
+            System.out.println(s);
+        }
+
+
+        // foreach
+        for ( String e : list){
+            System.out.println(e);
+        }
+
+
+        //泛型
+        Collection<Student> c1 = new ArrayList();
+        c1.add(new Student());
+        c1.removeIf(new Predicate<Student>() {
+            @Override
+            public boolean test(Student student) {
+                return false;
+            }
+        });
+
+    }
+}

JavaSE/day14/src/com/lc/day14/coll02/Test03.java

@@ -0,0 +1,49 @@
+package com.lc.day14.coll02;
+
+import com.lc.day14.ex2.Student;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.function.Predicate;
+
+/**
+ * ClassName: Test02
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/10 11:31
+ * @Version 1.0
+ */
+public class Test03 {
+
+    public static void main(String[] args) {
+       Collection<Integer> list = new ArrayList<>();
+
+        list.add(111);
+        list.add(222);
+        list.add(333);
+
+        //增强for原理是迭代器  使用迭代器 不可以在使用原集合操作 元素。
+//        for (Integer i : list) {
+//            if (i.equals(222)){
+//                list.remove(i);
+//            }
+//        }
+
+        //ConcurrentModificationException 并发修改异常
+
+
+        //在迭代器 内部 有删除方法。
+        Iterator<Integer> iterator = list.iterator();
+
+        while (iterator.hasNext()){
+            Integer next = iterator.next();
+            if (next == 111){
+                iterator.remove();
+            }
+        }
+
+        System.out.println(list);
+
+    }
+}

JavaSE/day14/src/com/lc/day14/ex/Test.java

@@ -0,0 +1,29 @@
+package com.lc.day14.ex;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/10 9:35
+ * @Version 1.0
+ */
+public class Test {
+    public static void main(String[] args) {
+        int i = 1;
+        Integer j = new Integer(2); // 0x1133
+        Circle c = new Circle(); // 0x1166 radius
+        change(i,j,c);
+        System.out.println("i = " + i); // 1 1 1 1
+        System.out.println("j = " + j); // 2 1 2 2
+        System.out.println("c.radius = " + c.radius); // 10 20 2 10 10
+    }
+
+    public static void change(int a ,Integer b,Circle c ){ //b = 0x1133 = 2
+        a += 10;
+        b = 20; // 0x1133 = 20  // Integer.valueOf(20) = new Integer(20) 0x1144
+        c.radius += 10; //0x1166.radius
+    }
+}
+class Circle{
+    double radius;
+}

JavaSE/day14/src/com/lc/day14/ex2/Student.java

@@ -0,0 +1,47 @@
+package com.lc.day14.ex2;
+
+/**
+ * ClassName: Student
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/10 11:07
+ * @Version 1.0
+ */
+public class Student {
+
+    private String name;
+
+    private int age;
+
+    public Student() {
+    }
+
+    public Student(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    @Override
+    public String toString() {
+        return "Student{" +
+                "name='" + name + '\'' +
+                ", age=" + age +
+                '}';
+    }
+}

JavaSE/day14/src/com/lc/day14/ex2/Test.java

@@ -0,0 +1,62 @@
+package com.lc.day14.ex2;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.function.Predicate;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/10 11:07
+ * @Version 1.0
+ */
+public class Test {
+
+    public static void main(String[] args) {
+        //集合
+        Collection coll = new ArrayList();
+
+        coll.add(new Student("zs",18));
+        coll.add(new Student("ls",19));
+        coll.add(new Student("ww",20));
+        coll.add(new Student("zl",12));
+        coll.add(new Student("kk",16));
+
+
+        // 判断是否为空
+        if (!coll.isEmpty()){
+            Object[] array = coll.toArray();
+
+            for (int i = 0; i < array.length; i++) {
+                //强制
+                Student s = (Student) array[i];
+                //zs
+                boolean equals = s.getName().equals("zs");
+                if (equals){
+                    //删除
+                    coll.remove(array[i]);
+                }
+            }
+        }
+
+        //查看
+        System.out.println(coll);
+
+
+        coll.removeIf(new Predicate() {
+            @Override
+            public boolean test(Object object) {
+                Student s1 = (Student) object;
+
+                if (s1.getAge() >= 18){
+                    return true;
+                }
+                return false;
+            }
+        });
+
+        System.out.println(coll);
+
+    }
+}

JavaSE/day14/src/com/lc/day14/ex2/Test04.java

@@ -0,0 +1,46 @@
+package com.lc.day14.ex2;
+
+import com.lc.day14.ex2.Student;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.function.Predicate;
+
+/**
+ * ClassName: Test04
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/10 11:50
+ * @Version 1.0
+ */
+public class Test04 {
+    public static void main(String[] args) {
+        Collection<Student> person=new ArrayList();
+        person.add(new Student("zs",15));
+        person.add(new Student("ls",21));
+        person.add(new Student("ww",17));
+        person.add(new Student("ll",23));
+        person.add(new Student("rr",17));
+        Object[] student=person.toArray();
+        for (int i = 0; i < 5; i++) {
+            System.out.println(student[i]);
+        }
+        System.out.println("删除前");
+
+        for (int i = 0; i < 5; i++) {
+            System.out.println(person);
+        }
+        person.removeIf(new Predicate<Student>() {
+            @Override
+            public boolean test(Student a) {
+                Student b=(Student)a;
+                if(b.getAge()>=18||b.getName().equals("zs"))
+                    return true;
+                else
+                    return false;
+            }
+        }) ;
+
+        System.out.println(person);
+    }
+}

JavaSE/day15/day15.iml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module-library">
+      <library name="JUnit4">
+        <CLASSES>
+          <root url="jar://$MAVEN_REPOSITORY$/junit/junit/4.13.1/junit-4.13.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar!/" />
+        </CLASSES>
+        <JAVADOC />
+        <SOURCES />
+      </library>
+    </orderEntry>
+  </component>
+</module>

JavaSE/day15/src/com/lc/day15/list01/Test01.java

@@ -0,0 +1,98 @@
+package com.lc.day15.list01;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.ListIterator;
+import java.util.function.UnaryOperator;
+
+/**
+ * ClassName: Test01
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 9:32
+ * @Version 1.0
+ */
+public class Test01 {
+
+    public static void main(String[] args) {
+        List<Integer> list = new ArrayList<>();
+
+        //添加
+        list.add(0,111);
+        //索引必须递增 不能跳过
+        list.add(1,222);
+
+        list.add(333);
+
+
+        //get(int index) 根据元素获取
+        Integer i = list.get(1);
+        System.out.println(i);
+
+
+        //remove(int index) 根据索引删除
+        list.remove(1); //重载
+
+        System.out.println(list);
+
+        //修改
+        Integer set = list.set(1, 222222);
+
+        System.out.println(list);
+
+        //
+        List list1 = new ArrayList<>();
+        list1.add(1);
+        list1.add(2);
+        list1.add(3);
+
+        List<Integer> list2 = new ArrayList<>();
+        list2.add(4);
+        list2.add(5);
+        list2.add(6);
+
+        //list1.addAll(list2); //添加所有的元素
+        //list1.add(list2); //添加一个元素
+
+        System.out.println(list1);
+
+        //集合不可变
+        List<Integer> integers = List.of(1, 2, 3);
+
+       // boolean add = integers.add(4);
+
+        //迭代器
+        ListIterator<Integer> integerListIterator = integers.listIterator();
+
+        //前一个
+        boolean b = integerListIterator.hasPrevious();
+
+
+        //`replaceAll
+
+        List<Integer> list3 = new ArrayList<>();
+
+        list3.add(1);
+        list3.add(2);
+        list3.add(3);
+        list3.add(4);
+
+        //UnaryOperator
+        list3.replaceAll(new UnaryOperator<Integer>() {
+            @Override
+            public Integer apply(Integer integer) {
+
+                //integer 每一个元素 +10
+                int i1 = integer + 10;
+
+                return i1;
+            }
+        });
+
+
+        System.out.println(list3);
+
+    }
+
+}

JavaSE/day15/src/com/lc/day15/list02/Student.java

@@ -0,0 +1,70 @@
+package com.lc.day15.list02;
+
+/**
+ * ClassName: Student
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 10:30
+ * @Version 1.0
+ */
+public class Student {
+
+    //学号，姓名，年龄，成绩
+
+    private Integer id;
+    private String name;
+    private Integer age;
+    private Double score;
+
+    public Student() {
+    }
+
+    public Student(Integer id, String name, Integer age, Double score) {
+        this.id = id;
+        this.name = name;
+        this.age = age;
+        this.score = score;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Integer getAge() {
+        return age;
+    }
+
+    public void setAge(Integer age) {
+        this.age = age;
+    }
+
+    public Double getScore() {
+        return score;
+    }
+
+    public void setScore(Double score) {
+        this.score = score;
+    }
+
+    @Override
+    public String toString() {
+        return "Student{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", age=" + age +
+                ", score=" + score +
+                '}';
+    }
+}

JavaSE/day15/src/com/lc/day15/list02/Test.java

@@ -0,0 +1,78 @@
+package com.lc.day15.list02;
+
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+import java.util.function.UnaryOperator;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 10:32
+ * @Version 1.0
+ */
+public class Test {
+    public static void main(String[] args) {
+
+
+        List<Student> ss = new ArrayList<>();
+
+        ss.add(new Student(1,"张三", 20,66.0));
+        ss.add(new Student(2,"坤坤", 22,86.2));
+        ss.add(new Student(3,"凡凡", 18,96.0));
+        ss.add(new Student(4,"李四", 26,95.0));
+        ss.add(new Student(5,"韩梅梅", 17,16.0));
+        ss.add(new Student(6,"李雷", 20,26.0));
+
+        for (Student s : ss) {
+            System.out.println(s);
+        }
+
+        //找出成绩最高的学院删除 ， 找出成绩最低的学员删除。
+        //排序
+        ss.sort(new Comparator<Student>() {
+            @Override
+            public int compare(Student o1, Student o2) {
+                return o1.getScore().compareTo(o2.getScore());
+            }
+        });
+
+        System.out.println("---------------");
+
+        for (Student s : ss) {
+            System.out.println(s);
+        }
+
+        //删除第一个  最后一个
+
+        ss.remove(0);
+        ss.remove(ss.size() - 1);
+
+        System.out.println("---------------");
+
+        for (Student s : ss) {
+            System.out.println(s);
+        }
+
+        ss.replaceAll(new UnaryOperator<Student>() {
+            @Override
+            public Student apply(Student student) { //0x1122
+
+                student.setScore(student.getScore()+10);
+
+                if (student.getScore() > 100){
+                    student.setScore(100.0);
+                }
+                return student;
+            }
+        });
+
+        System.out.println("---------------");
+
+        for (Student s : ss) {
+            System.out.println(s);
+        }
+
+    }
+}

JavaSE/day15/src/com/lc/day15/list03/Test01.java

@@ -0,0 +1,28 @@
+package com.lc.day15.list03;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * ClassName: Test01
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 10:49
+ * @Version 1.0
+ */
+public class Test01 {
+
+    public static void main(String[] args) {
+
+        // 创建的数组 长度 0
+        List<String> list = new ArrayList<>();
+
+        // 指定容量 this.elementData = new Object[initialCapacity];
+        List list1 = new ArrayList<>(20);
+
+        //元素
+        List list2 = new ArrayList(List.of(1,2,3,4,5,6,7));
+        list2.add(8);
+    }
+
+}

JavaSE/day15/src/com/lc/day15/list03/Test02.java

@@ -0,0 +1,39 @@
+package com.lc.day15.list03;
+
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+
+/**
+ * ClassName: Test01
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 10:49
+ * @Version 1.0
+ */
+public class Test02 {
+
+    public static void main(String[] args) {
+        LinkedList<Integer> linkedList = new LinkedList<>();
+
+        linkedList.addFirst(11);
+        linkedList.addFirst(22);
+        linkedList.addFirst(33);
+
+        //33 22 11
+
+        //栈
+        Integer first = linkedList.getFirst();
+        System.out.println(first);
+
+        //队列
+        Integer last = linkedList.getLast();
+        System.out.println(last);
+
+        //连接池
+        //除雪 工具箱  按照顺序。
+
+
+    }
+
+}

JavaSE/day15/src/com/lc/day15/list03/Test03.java

@@ -0,0 +1,52 @@
+package com.lc.day15.list03;
+
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.Enumeration;
+import java.util.List;
+import java.util.Vector;
+
+/**
+ * ClassName: Test03
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 11:01
+ * @Version 1.0
+ */
+public class Test03 {
+
+    public static void main(String[] args) {
+
+        Vector<Integer> vector = new Vector<>();
+
+        vector.add(1); //synchronized 线程安全的
+        vector.add(2);
+        vector.add(3);
+
+        Enumeration<Integer> elements = vector.elements();
+
+        while (elements.hasMoreElements()){
+            Integer i = elements.nextElement();
+            System.out.println(i);
+        }
+
+
+
+    }
+
+    @Test
+    public void testListRemove() {
+        List list = new ArrayList(); //0x1122
+        list.add(1);
+        list.add(2);
+        list.add(3);
+        updateList(list);
+        System.out.println(list);// 123 12 123 12   // 12
+    }
+
+    private static void updateList(List list) { // 0x1122
+        list.remove(2);  // 索引
+    }
+
+}

JavaSE/day15/src/com/lc/day15/set04/TestSet.java

@@ -0,0 +1,34 @@
+package com.lc.day15.set04;
+
+import java.util.HashSet;
+
+/**
+ * ClassName: TestSet
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 11:37
+ * @Version 1.0
+ */
+public class TestSet {
+
+    public static void main(String[] args) {
+
+        HashSet set = new HashSet<>();
+
+        /*
+        - 它不保证集合的迭代顺序;
+        - 此类允许`null`元素
+        - 不可重复
+         */
+        set.add(1);
+        set.add(1);
+        set.add(2);
+        set.add(null);
+        set.add(3);
+        set.add(4);
+
+        System.out.println(set);
+
+
+    }
+}

JavaSE/day15/src/com/lc/day15/set05/Person.java

@@ -0,0 +1,54 @@
+package com.lc.day15.set05;
+
+import java.util.Objects;
+import java.util.Random;
+
+/**
+ * ClassName: Person
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 11:43
+ * @Version 1.0
+ */
+public class Person {
+
+    String name;
+    int age;
+
+    public Person(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    @Override
+    public boolean equals(Object object) {
+        Person p = (Person) object;
+        boolean result = this.name.equals(p.name);
+        result = result && (this.age == p.age);
+        return result;
+    }
+
+
+    /*
+        总结：
+            添加 返回是否返回相同的hashcode 判断是否调用equals。
+            返回的hashcode 相同调用equals 否则不调用,直接添加
+                不同的hashcode 不是相同对象。
+
+            相同 equals
+                相同的hashcode 对象 可能相同的。比较内容。equals 返回true 相同 返回 false 不相同。
+     */
+    @Override
+    public int hashCode() {
+        //return new Random().nextInt();
+        return 1;
+    }
+
+    @Override
+    public String toString() {
+        return "Person{" +
+                "name='" + name + '\'' +
+                ", age=" + age +
+                '}';
+    }
+}

JavaSE/day15/src/com/lc/day15/set05/Test.java

@@ -0,0 +1,30 @@
+package com.lc.day15.set05;
+
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 11:44
+ * @Version 1.0
+ */
+public class Test {
+
+    public static void main(String[] args) {
+
+        //hashcode  equalus
+
+        Set<Person> set = new HashSet<>();
+
+        //使用地址
+        set.add(new Person("a", 1));
+        set.add(new Person("a", 2));
+        set.add(new Person("a", 2));
+
+        //改变存储 判断
+        System.out.println(set);
+
+    }
+}

JavaSE/day15/src/com/lc/day15/set06/Person.java

@@ -0,0 +1,46 @@
+package com.lc.day15.set06;
+
+import java.util.Objects;
+
+/**
+ * ClassName: Person
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 14:07
+ * @Version 1.0
+ */
+public class Person {
+
+    int id;
+    String name;
+
+    public Person(int id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    @Override
+    public boolean equals(Object object) {
+        if (this == object) return true;
+        if (object == null || getClass() != object.getClass()) return false;
+        Person person = (Person) object;
+        return id == person.id && Objects.equals(name, person.name);
+    }
+
+
+    @Override
+    public int hashCode() {
+        // hashcode 是通过 id, name 生成的
+        int hash = Objects.hash(id, name);
+        System.out.println("hash :"+hash);
+        return Objects.hash(id, name);
+    }
+
+    @Override
+    public String toString() {
+        return "Person{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                '}';
+    }
+}

JavaSE/day15/src/com/lc/day15/set06/Test.java

@@ -0,0 +1,46 @@
+package com.lc.day15.set06;
+
+import java.util.HashSet;
+import java.util.Random;
+import java.util.Set;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 13:38
+ * @Version 1.0
+ */
+public class Test {
+
+    public static void main(String[] args) {
+        //编写一个程序，获取10个1至20的随机数，要求随机数不能重复。并把最终的随机数输出到控制台。
+        Set<Integer> number = get10Number();
+
+        System.out.println(number);
+
+        //获取 20 20-40；
+        Set<Integer> number1 = getNumber(15, 20, 40);
+        System.out.println(number1);
+
+    }
+
+    public static Set<Integer> getNumber(int count ,int start, int end){
+        Set<Integer> set = new HashSet<>();
+
+        while (set.size() != count){
+            set.add( new Random().nextInt(end - start) +start);
+        }
+        return set;
+    }
+
+    public static Set<Integer> get10Number(){
+        Set<Integer> set = new HashSet<>();
+
+        while (set.size() != 10){
+            set.add( new Random().nextInt(20) +1);
+        }
+        return set;
+    }
+
+}

JavaSE/day15/src/com/lc/day15/set06/Test01.java

@@ -0,0 +1,30 @@
+package com.lc.day15.set06;
+
+import java.util.*;
+
+/**
+ * ClassName: Test01
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 14:02
+ * @Version 1.0
+ */
+public class Test01 {
+    public static void main(String[] args) {
+
+        Scanner scanner = new Scanner(System.in);
+
+        String next = scanner.next();
+
+        char[] charArray = next.toCharArray();
+
+        Set<Character> set = new HashSet<>();
+
+        for (char c : charArray) {
+            set.add(c);
+        }
+
+        System.out.println(set);
+
+    }
+}

JavaSE/day15/src/com/lc/day15/set06/Test02.java

@@ -0,0 +1,39 @@
+package com.lc.day15.set06;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Scanner;
+import java.util.Set;
+
+/**
+ * ClassName: Test01
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 14:02
+ * @Version 1.0
+ */
+public class Test02 {
+    public static void main(String[] args) {
+
+        HashSet set = new HashSet();
+
+        Person p1 = new Person(1001,"AA"); //34072
+        Person p2 = new Person(1002,"BB"); //34135
+
+        set.add(p1);
+        set.add(p2);
+        p1.name = "CC";
+        set.remove(p1); // 34136  1001 CC
+        System.out.println(set);
+
+        set.add(new Person(1001,"CC")); // 34136
+        System.out.println(set);
+
+        set.add(new Person(1001,"AA")); // 34072
+        System.out.println(set);
+
+        //其中Person类中重写了hashCode()和equal()方法
+
+
+    }
+}

JavaSE/day15/src/com/lc/day15/set07/Test.java

@@ -0,0 +1,30 @@
+package com.lc.day15.set07;
+
+import java.util.LinkedHashSet;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 14:49
+ * @Version 1.0
+ */
+public class Test {
+
+    public static void main(String[] args) {
+
+        LinkedHashSet<Integer> linkedHashSet = new LinkedHashSet<>();
+
+        linkedHashSet.add(1);
+        linkedHashSet.add(1);
+        linkedHashSet.add(2);
+        linkedHashSet.add(3);
+
+        for (Integer i : linkedHashSet) {
+            System.out.println(i);
+        }
+
+        System.out.println(linkedHashSet);
+
+    }
+}

JavaSE/day15/src/com/lc/day15/set08/Person.java

@@ -0,0 +1,32 @@
+package com.lc.day15.set08;
+
+/**
+ * ClassName: Person
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 14:56
+ * @Version 1.0
+ */
+public class Person implements Comparable<Person> {
+
+    String name;
+
+    public Person(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public int compareTo(Person o) {
+        // == 0 相等  相等就是同一个对象。
+        // > 0  当前大于传入对象
+        // < 0  当前小于传入对象
+        return this.name.compareTo(o.name);
+    }
+
+    @Override
+    public String toString() {
+        return "Person{" +
+                "name='" + name + '\'' +
+                '}';
+    }
+}

JavaSE/day15/src/com/lc/day15/set08/TestTree.java

@@ -0,0 +1,28 @@
+package com.lc.day15.set08;
+
+import java.util.Set;
+import java.util.TreeSet;
+
+/**
+ * ClassName: TestTree
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 14:54
+ * @Version 1.0
+ */
+public class TestTree {
+
+    public static void main(String[] args) {
+        Set<String> sets = new TreeSet<>();
+
+        sets.add("b");
+        sets.add("a");
+        sets.add("c");
+        sets.add("e");
+        sets.add("h");
+
+        //有序的  自然排序
+        System.out.println(sets);
+    }
+
+}

JavaSE/day15/src/com/lc/day15/set08/TestTree1.java

@@ -0,0 +1,34 @@
+package com.lc.day15.set08;
+
+import java.util.Set;
+import java.util.TreeSet;
+
+/**
+ * ClassName: TestTree
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 14:54
+ * @Version 1.0
+ */
+public class TestTree1 {
+
+    public static void main(String[] args) {
+        Set<Person> sets = new TreeSet<>();
+
+        sets.add(new Person("c"));
+        sets.add(new Person("a"));
+        sets.add(new Person("b"));
+        sets.add(new Person("a"));
+        sets.add(new Person("d"));
+
+        //自然排序 ：
+        //1. 元素必须实现Comparable接口
+        //2. 重写compareTo方法
+
+        // Person cannot be cast to class java.lang.Comparable
+
+        System.out.println(sets);
+        // 结果
+
+    }
+}

JavaSE/day15/src/com/lc/day15/set08/TestTree2.java

@@ -0,0 +1,33 @@
+package com.lc.day15.set08;
+
+import java.util.Comparator;
+import java.util.Set;
+import java.util.TreeSet;
+
+/**
+ * ClassName: TestTree
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 14:54
+ * @Version 1.0
+ */
+public class TestTree2 {
+
+    public static void main(String[] args) {
+        Set<Person> sets = new TreeSet<>(new Comparator<Person>() {
+            @Override
+            public int compare(Person o1, Person o2) {
+                return -o1.name.compareTo(o2.name);
+            }
+        });
+
+        sets.add(new Person("c"));
+        sets.add(new Person("a"));
+        sets.add(new Person("b"));
+        sets.add(new Person("a"));
+        sets.add(new Person("d"));
+
+        System.out.println(sets);
+
+    }
+}

JavaSE/day15/src/com/lc/day15/set09/Employee.java

@@ -0,0 +1,59 @@
+package com.lc.day15.set09;
+
+/**
+ * ClassName: Employee
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 16:00
+ * @Version 1.0
+ */
+public class Employee implements Comparable<Employee> {
+    private String name;
+    private Integer age;
+    private MyDate birthday;
+
+    public Employee(String name, Integer age, MyDate birthday) {
+        this.name = name;
+        this.age = age;
+        this.birthday = birthday;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Integer getAge() {
+        return age;
+    }
+
+    public void setAge(Integer age) {
+        this.age = age;
+    }
+
+    public MyDate getBirthday() {
+        return birthday;
+    }
+
+    public void setBirthday(MyDate birthday) {
+        this.birthday = birthday;
+    }
+
+    @Override
+    public String toString() {
+        return "Employee{" +
+                "name='" + name + '\'' +
+                ", age=" + age +
+                ", birthday=" + birthday +
+                '}';
+    }
+
+    @Override
+    public int compareTo(Employee o) {
+
+        return this.name.compareTo(o.name);
+    }
+}

JavaSE/day15/src/com/lc/day15/set09/MyDate.java

@@ -0,0 +1,54 @@
+package com.lc.day15.set09;
+
+/**
+ * ClassName: MyDate
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 16:00
+ * @Version 1.0
+ */
+public class MyDate {
+
+    private Integer year;
+    private Integer month;
+    private Integer day;
+
+    public MyDate(Integer year, Integer month, Integer day) {
+        this.year = year;
+        this.month = month;
+        this.day = day;
+    }
+
+    public Integer getYear() {
+        return year;
+    }
+
+    public void setYear(Integer year) {
+        this.year = year;
+    }
+
+    public Integer getMonth() {
+        return month;
+    }
+
+    public void setMonth(Integer month) {
+        this.month = month;
+    }
+
+    public Integer getDay() {
+        return day;
+    }
+
+    public void setDay(Integer day) {
+        this.day = day;
+    }
+
+    @Override
+    public String toString() {
+        return "MyDate{" +
+                "year=" + year +
+                ", month=" + month +
+                ", day=" + day +
+                '}';
+    }
+}

JavaSE/day15/src/com/lc/day15/set09/Test.java

@@ -0,0 +1,53 @@
+package com.lc.day15.set09;
+
+import java.util.Comparator;
+import java.util.TreeMap;
+import java.util.TreeSet;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 16:00
+ * @Version 1.0
+ */
+public class Test {
+
+    public static void main(String[] args) {
+
+        TreeSet<Employee> treeSet = new TreeSet<>();
+        
+        treeSet.add(new Employee("zs",18, new MyDate(1990,3,10) ));
+        treeSet.add(new Employee("lis",18, new MyDate(1994,2,10) ));
+        treeSet.add(new Employee("ww",19, new MyDate(1992,3,22) ));
+        treeSet.add(new Employee("zl",18, new MyDate(1990,4,10) ));
+        treeSet.add(new Employee("kk",22, new MyDate(1993,3,11) ));
+
+        for (Employee employee : treeSet) {
+            System.out.println(employee);
+        }
+
+        //生日日期的
+        TreeSet<Employee> tt = new TreeSet<>(new Comparator<Employee>(){
+
+            @Override
+            public int compare(Employee o1, Employee o2) {
+                //生日月份
+                int i = o1.getBirthday().getMonth().compareTo(o2.getBirthday().getMonth());
+                //天数
+                i = i == 0 ? o1.getBirthday().getDay().compareTo(o2.getBirthday().getDay()): i;
+                return i;
+            }
+        });
+
+
+        tt.addAll(treeSet);
+
+        System.out.println("---------------------");
+        for (Employee employee : tt) {
+            System.out.println(employee);
+        }
+
+    }
+
+}

JavaSE/day15/src/com/lc/day15/set09/Test01.java

@@ -0,0 +1,50 @@
+package com.lc.day15.set09;
+
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+import java.util.TreeSet;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/11 16:00
+ * @Version 1.0
+ */
+public class Test01 {
+
+    public static void main(String[] args) {
+        //在一个List集合中存储了多个无大小顺序并且有重复的字符串，
+        // 定义一个方法，让其有序(从小到大排序)，并且不能去除重复元素。
+
+        List<Integer> list = new ArrayList<>();
+        list.add(1);
+        list.add(2);
+        list.add(3);
+        list.add(4);
+        list.add(5);
+        list.add(6);
+        list.add(7);
+        list.add(7);
+        list.add(2);
+        list.add(4);
+        list.add(3);
+
+        TreeSet<Integer> set = new TreeSet<>(new Comparator<Integer>() {
+            @Override
+            public int compare(Integer o1, Integer o2) {
+
+                int r = o1.compareTo(o2);
+                return  r == 0 ? 1 : r;
+            }
+        });
+
+        for (Integer i : list) {
+            set.add(i);
+        }
+
+        System.out.println(set);
+
+    }
+}

JavaSE/day16/day16.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

JavaSE/day16/src/com/lc/day16/coll06/Test.java

@@ -0,0 +1,60 @@
+package com.lc.day16.coll06;
+
+import java.sql.Connection;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/12 11:45
+ * @Version 1.0
+ */
+public class Test {
+    public static void main(String[] args) {
+
+        /*
+        **排序操作：**
+        - reverse(List)：反转 List 中元素的顺序
+        - shuffle(List)：对 List 集合元素进行随机排序
+        - sort(List)：根据元素的自然顺序对指定 List 集合元素按升序排序
+        - sort(List，Comparator)：根据指定的 Comparator 产生的顺序对 List 集合元素进行排序
+        - swap(List，int， int)：将指定 list 集合中的 i 处元素和 j 处元素进行交换
+         */
+
+        List<Integer> integers = List.of(4, 2, 324, 234, 25, 34, 65, 367);
+
+        ArrayList<Integer> list = new ArrayList<>(integers);
+        //反转
+        Collections.reverse(list);
+
+        System.out.println(list);
+
+        //shuffle 随机调换  洗牌
+        Collections.shuffle(list);
+        System.out.println(list);
+
+        //sort
+        Collections.sort(list);
+        System.out.println(list);
+
+        //Comparator
+        Collections.sort(list, new Comparator<Integer>() {
+            @Override
+            public int compare(Integer o1, Integer o2) {
+                return Integer.compare(o2, o1);
+            }
+        });
+
+        System.out.println(list);
+
+
+        //交换
+        Collections.swap(list, 0, list.size() - 1);
+
+        System.out.println(list);
+    }
+}

JavaSE/day16/src/com/lc/day16/coll06/Test1.java

@@ -0,0 +1,45 @@
+package com.lc.day16.coll06;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/12 11:45
+ * @Version 1.0
+ */
+public class Test1 {
+    public static void main(String[] args) {
+
+       /*
+       - Object max(Collection)：根据元素的自然顺序，返回给定集合中的最大元素
+        - Object max(Collection，Comparator)：根据 Comparator 指定的顺序，返回给定集合中的最大元素
+        - Object min(Collection)：根据元素的自然顺序，返回给定集合中的最小元素
+        - Object min(Collection，Comparator)：根据 Comparator 指定的顺序，返回给定集合中的最小元素
+        - int binarySearch(List list,T key)在List集合中查找某个元素的下标，但是List的元素必须是T或T的子类对象，而且必须是可比较大小的，即支持自然排序的。而且集合也事先必须是有序的，否则结果不确定。
+        - int binarySearch(List list,T key,Comparator c)在List集合中查找某个元素的下标，但是List的元素必须是T或T的子类对象，而且集合也事先必须是按照c比较器规则进行排序过的，否则结果不确定。
+        - int frequency(Collection c，Object o)：返回指定集合中指定元素的出现次数
+        */
+
+        List<Integer> integers = List.of(4, 2, 324, 234, 25, 34, 65, 367);
+
+        ArrayList<Integer> list = new ArrayList<>(integers);
+
+        //max
+        Integer max = Collections.max(list);
+        System.out.println(max);
+
+
+        //binarySearch
+        int i = Collections.binarySearch(list, 2); //索引
+        System.out.println(i);
+
+        //frequency
+        int frequency = Collections.frequency(list, 2);
+        System.out.println(frequency);
+    }
+}

JavaSE/day16/src/com/lc/day16/coll06/Test2.java

@@ -0,0 +1,46 @@
+package com.lc.day16.coll06;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/12 11:45
+ * @Version 1.0
+ */
+public class Test2 {
+    public static void main(String[] args) {
+        /*
+        **复制、替换**
+        - void copy(List dest,List src)：将src中的内容复制到dest中
+        - boolean replaceAll(List list，Object oldVal，Object newVal)：使用新值替换 List 对象的所有旧值
+        - 提供了多个unmodifiableXxx()方法，该方法返回指定 Xxx的不可修改的视图。
+        **添加**
+        - boolean addAll(Collection  c,T... elements)将所有指定元素添加到指定 collection 中。
+         */
+
+        List<Integer> integers = List.of(4, 2, 324, 234, 25, 34, 65, 367);
+        ArrayList<Integer> list = new ArrayList<>(integers);
+
+        ArrayList<Integer> dest = new ArrayList<>(integers);
+
+        //赋值
+        Collections.copy(dest,list);
+
+        System.out.println(dest);
+
+        // 替换
+        Collections.replaceAll(list,234,2345);
+        System.out.println(list);
+
+
+        //addAll
+        boolean b = Collections.addAll(list, 1111, 2222, 3333, 4444);
+        System.out.println(b);
+
+        System.out.println(list);
+    }
+}

JavaSE/day16/src/com/lc/day16/list07/Person.java

@@ -0,0 +1,34 @@
+package com.lc.day16.list07;
+
+import java.util.Objects;
+
+/**
+ * ClassName: Person
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/12 16:31
+ * @Version 1.0
+ */
+public class Person {
+
+
+    String name ;
+
+    public Person(String name) {
+        this.name = name;
+    }
+
+
+    @Override
+    public boolean equals(Object object) {
+        if (this == object) return true;
+        if (object == null || getClass() != object.getClass()) return false;
+        Person person = (Person) object;
+        return Objects.equals(name, person.name);
+    }
+
+    @Override
+    public int hashCode() {
+        return 1;
+    }
+}

JavaSE/day16/src/com/lc/day16/list07/Test.java

@@ -0,0 +1,46 @@
+package com.lc.day16.list07;
+
+import java.util.ArrayList;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/12 13:42
+ * @Version 1.0
+ */
+public class Test {
+
+    public static void main(String[] args) {
+
+
+
+        ArrayList<String> list = new ArrayList<>();
+
+        list.add("1"); //1
+        list.add("2");
+        list.add("3");
+        list.add("4");
+        list.add("5");
+        list.add("6");
+        list.add("7");
+        list.add("8");
+        list.add("9"); //9
+        list.add("10"); //10
+        list.add("11"); //11
+        list.add("11"); //11
+        list.add("11"); //11
+        list.add("11"); //11
+        list.add("11"); //11
+        list.add("11"); //11
+        list.add("11"); //11
+        list.add("11"); //11
+
+
+        ArrayList<String> list1 = new ArrayList<>();
+        list1.add("0");
+        list1.addAll(list); //一次性添加 11个元素  看源码
+
+
+    }
+}

JavaSE/day16/src/com/lc/day16/list07/Test1.java

@@ -0,0 +1,22 @@
+package com.lc.day16.list07;
+
+import java.util.ArrayList;
+import java.util.LinkedList;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/12 13:42
+ * @Version 1.0
+ */
+public class Test1 {
+
+    public static void main(String[] args) {
+
+
+        LinkedList<String> list = new LinkedList<>();
+        list.add("1");
+
+    }
+}

JavaSE/day16/src/com/lc/day16/list07/Test2.java

@@ -0,0 +1,23 @@
+package com.lc.day16.list07;
+
+import java.util.HashMap;
+import java.util.LinkedList;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/12 13:42
+ * @Version 1.0
+ */
+public class Test2 {
+
+    public static void main(String[] args) {
+
+        HashMap<Integer,Integer> map = new HashMap<>();
+
+        map.put(1,111);
+        map.put(2,111);
+
+    }
+}

JavaSE/day16/src/com/lc/day16/list07/Test4.java

@@ -0,0 +1,23 @@
+package com.lc.day16.list07;
+
+import java.util.HashMap;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/12 13:42
+ * @Version 1.0
+ */
+public class Test4 {
+
+    public static void main(String[] args) {
+
+        HashMap<Person,Integer> map = new HashMap<>();
+
+        map.put(new Person("1"),0);
+        map.put(new Person("2"),0);
+
+
+    }
+}

JavaSE/day16/src/com/lc/day16/map01/Person.java

@@ -0,0 +1,24 @@
+package com.lc.day16.map01;
+
+/**
+ * ClassName: Person
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/12 9:51
+ * @Version 1.0
+ */
+public class Person {
+
+    String name;
+
+    public Person(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public String toString() {
+        return "Person{" +
+                "name='" + name + '\'' +
+                '}';
+    }
+}

JavaSE/day16/src/com/lc/day16/map01/TestMap01.java

@@ -0,0 +1,144 @@
+package com.lc.day16.map01;
+
+import jdk.swing.interop.SwingInterOpUtils;
+
+import java.util.*;
+
+/**
+ * ClassName: TestMap01
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/12 9:42
+ * @Version 1.0
+ */
+public class TestMap01 {
+    public static void main(String[] args) {
+
+        /*
+        - **添加、修改操作：**
+          - Object put(Object key,Object value)：将指定key-value添加到(或修改)当前map对象中
+          - void putAll(Map m):将m中的所有key-value对存放到当前map中
+        - **删除操作：**
+          - Object remove(Object key)：移除指定key的key-value对，并返回value
+          - void clear()：清空当前map中的所有数据
+        - **元素查询的操作：**
+          - Object get(Object key)：获取指定key对应的value
+          - boolean containsKey(Object key)：是否包含指定的key
+          - boolean containsValue(Object value)：是否包含指定的value
+          - int size()：返回map中key-value对的个数
+          - boolean isEmpty()：判断当前map是否为空
+          - boolean equals(Object obj)：判断当前map和参数对象obj是否相等
+        - **元视图操作的方法：**
+          - Set keySet()：返回所有key构成的Set集合
+          - Collection values()：返回所有value构成的Collection集合
+          - Set entrySet()：返回所有key-value对构成的Set集合
+         */
+
+        //map
+        Map<Object,String> map = new HashMap<>();
+
+        map.put(1,"kunkun");
+        map.put(2,"ff");
+        map.put(3,"ff");
+        map.put(3,"llei"); //key 重复 替换 value 覆盖
+        map.put(4,null);
+        map.put(null,null);
+
+        System.out.println(map);
+
+
+        //putAll
+
+
+        Map<Object,String> map1 = new HashMap<>();
+        map1.put(1,"zs");
+        map1.put(2,"hmm");
+        Map<Object,String> map2 = new HashMap<>(map1);
+        map2.put(3,"zl");
+        map2.put(4,"zl");
+
+        //map1.putAll(map2);
+        // System.out.println(map1);
+        System.out.println(map2);
+
+        String remove = map2.remove(1);
+        System.out.println(remove);
+
+        //System.out.println(map2);
+        //map2.clear();
+        System.out.println(map2);
+
+        //get
+        String s = map2.get(2);
+        System.out.println(s);
+        System.out.println(map2);
+
+        boolean b = map2.containsKey(7);
+        System.out.println(b);
+        //containsValue
+        boolean b1 = map2.containsValue("zl");
+        System.out.println(b1);
+
+        //size
+        int size = map2.size();
+        System.out.println(size);
+
+        //empty
+        boolean empty = map2.isEmpty();
+        System.out.println(empty);
+
+
+        Map<Integer,Person> map3 = new HashMap<>();
+
+        map3.put(1,new Person("韩梅梅"));
+        map3.put(2,new Person("李雷"));
+        map3.put(3,new Person("小明"));
+        map3.put(4,new Person("小红"));
+
+        //根据key获取value
+
+        //keySet
+        for (Integer i : map3.keySet()) {
+            Person person = map3.get(i);
+
+            System.out.println("key："+i + "---value:"+ person);
+        }
+
+
+        //entrySet
+        for (Map.Entry<Integer, Person> entry : map3.entrySet()) {
+            System.out.println(entry.getKey() +"---"+ entry.getValue());
+        }
+
+
+        //班级名称   班级 多个人 List
+
+        Map<String, List<Person>> classs = new HashMap<>();
+
+        List<Person> list = new ArrayList<>();
+        list.add(new Person("hmm1"));
+        list.add(new Person("hmm2"));
+        list.add(new Person("hmm3"));
+        list.add(new Person("hmm4"));
+
+        classs.put("java",list);
+
+        List<Person> java = classs.get("java");
+
+        for (Person person : java) {
+            System.out.println(person);
+        }
+
+
+        //key
+        Map<Person,String> map4 = new HashMap<>();
+        map4.put(new Person("1"),"1");
+        map4.put(new Person("1"),"1");
+        map4.put(new Person("1"),"1");
+        map4.put(new Person("1"),"1");
+
+        System.out.println(map4.size()); // 没有重写 存的是 地址。
+
+    }
+
+}

JavaSE/day16/src/com/lc/day16/map02/Test.java

@@ -0,0 +1,38 @@
+package com.lc.day16.map02;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/12 10:53
+ * @Version 1.0
+ */
+public class Test {
+
+
+    public static void main(String[] args) {
+
+        LinkedHashMap<Integer, String> linkedHashMap = new LinkedHashMap<>();
+
+        linkedHashMap.put(1,"a");
+        linkedHashMap.put(2,"b");
+        linkedHashMap.put(3,"c");
+        linkedHashMap.put(4,"d");
+
+        String s = linkedHashMap.get(1);
+        System.out.println(s);
+
+
+        Set<Map.Entry<Integer, String>> entries = linkedHashMap.entrySet();
+
+        for (Map.Entry<Integer, String> entry : entries) {
+            System.out.println(entry.getKey() +"-"+ entry.getValue());
+        }
+
+        
+    }
+}

JavaSE/day16/src/com/lc/day16/map03/Test.java

@@ -0,0 +1,45 @@
+package com.lc.day16.map03;
+
+import java.util.Comparator;
+import java.util.Set;
+import java.util.TreeMap;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/12 10:57
+ * @Version 1.0
+ */
+public class Test {
+
+    public static void main(String[] args) {
+
+        TreeMap<Integer,String> treeMap = new TreeMap<>();
+
+        treeMap.put(3, "3");
+        treeMap.put(4, "3");
+        treeMap.put(1, "3");
+        treeMap.put(2, "3");
+
+        //Integer 实现 cmoparable 接口
+
+        Set<Integer> integers = treeMap.keySet();
+        System.out.println(integers);
+
+
+        TreeMap<Integer,String> treeMap1 = new TreeMap<>(new Comparator<Integer>() {
+            @Override
+            public int compare(Integer o1, Integer o2) {
+
+                return -Integer.compare(o1,o2);
+            }
+        });
+        treeMap1.putAll(treeMap);
+
+        System.out.println(treeMap1.keySet());
+
+    }
+
+
+}

JavaSE/day16/src/com/lc/day16/map04/Test.java

@@ -0,0 +1,38 @@
+package com.lc.day16.map04;
+
+import java.util.Enumeration;
+import java.util.Hashtable;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/12 11:13
+ * @Version 1.0
+ */
+public class Test {
+    public static void main(String[] args) {
+
+        Hashtable<Integer,String> hashtable = new Hashtable<>();
+        //该类实现了一个哈希表，它将键映射到值。 任何非null对象都可以用作键或值。
+
+        hashtable.put(1,"a");
+        hashtable.put(2,"b");
+
+        Enumeration<String> elements = hashtable.elements();
+
+        while (elements.hasMoreElements()){
+            System.out.println(elements.nextElement());
+        }
+
+        //和其他对比
+        //线程安全的
+
+
+        Hashtable hash  = new Hashtable();
+
+        hash.put(null,null);
+
+        System.out.println(hash);
+    }
+}

JavaSE/day16/src/com/lc/day16/map05/Test.java

@@ -0,0 +1,40 @@
+package com.lc.day16.map05;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Properties;
+import java.util.Set;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/12 11:21
+ * @Version 1.0
+ */
+public class Test {
+
+    public static void main(String[] args) {
+
+
+        Properties properties = new Properties();
+
+        properties.put("name", "jack");
+        properties.put("pass", "123456");
+
+
+        String property = properties.getProperty("name");
+        System.out.println(property);
+
+        //properties.load(); //文件
+
+        Set<Object> objects = properties.keySet();
+
+        System.out.println(objects);
+
+
+        HashSet set = new HashSet();
+
+        set.add("123");
+    }
+}

JavaSE/day17/day17.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

JavaSE/day17/src/com/lc/day16/homework/Test01.java

@@ -0,0 +1,80 @@
+package com.lc.day16.homework;
+
+import java.util.*;
+
+/**
+ * ClassName: Test01
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/15 9:12
+ * @Version 1.0
+ */
+public class Test01 {
+    /*
+    1. 生成牌：生成54张扑克牌。使用LinkedHashMap，完成一个数字与字符串纸牌的对应关系
+    2. 洗牌：对54张牌进行随机排序。
+    3. 发牌：三个玩家参与游戏并交替摸牌，最后三张留作底牌。使用ArrayList存储各个玩家及底牌的牌。
+    4. 看牌：查看三人各自手中的牌（按照牌的大小排序）、底牌
+     */
+    public static void main(String[] args) {
+        //存储数字
+        String[] nums = { "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K", "A", "2" };
+        //存储花色
+        String[] colors = { "♦", "♣", "♥", "♠" };
+        //存储牌
+        LinkedHashMap<Integer, String> cards = new LinkedHashMap<>();
+        //索引
+        int index = 0;
+        //ArrayList
+        List<Integer> list = new ArrayList<>();
+
+        for (String num : nums) {
+            for (String color : colors) {
+                cards.put(index, color + num);
+                list.add(index);
+                index++;
+            }
+        }
+        //大王  小王
+        cards.put(index, "小王");
+        list.add(index);
+        list.add(++index);
+        cards.put(index, "大王");
+        //洗牌
+        Collections.shuffle(list);
+        //玩家
+        TreeMap<Integer, String> paly1 = new TreeMap<>();
+        TreeMap<Integer, String> paly2 = new TreeMap<>();
+        TreeMap<Integer, String> paly3 = new TreeMap<>();
+
+        List<String> dipai = new ArrayList<>();
+        dipai.add( cards.get(list.get(0)) );
+        dipai.add( cards.get(list.get(1)));
+        dipai.add( cards.get(list.get(2)));
+
+        //发牌
+        for (int i = 3; i < list.size(); i++) {
+            if(i % 3 == 0){
+                paly1.put(list.get(i),cards.get(list.get(i)));
+            }else if(i % 3 == 1){
+                paly2.put(list.get(i),cards.get(list.get(i)));
+            }else if (i % 3 == 2){
+                paly3.put(list.get(i),cards.get(list.get(i)));
+            }
+        }
+
+        //看牌
+        lookPoker("玩家1",paly1);
+        lookPoker("玩家2",paly2);
+        lookPoker("玩家3",paly3);
+        //底牌
+        System.out.println("底牌:" + dipai);
+
+    }
+
+    private static void lookPoker(String 玩家1, TreeMap<Integer, String> paly1) {
+        System.out.println(玩家1 + ":" + paly1.values());
+    }
+
+
+}

JavaSE/day17/src/com/lc/day16/homework/Test02.java

@@ -0,0 +1,62 @@
+package com.lc.day16.homework;
+
+import java.util.*;
+
+/**
+ * ClassName: Test01
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/15 9:12
+ * @Version 1.0
+ */
+public class Test02 {
+    /*
+        把字符串str字符串先按照;进行拆分，得到34个省（包括23个省，5个自治区，4个直辖市，2个特别行政区，下面的题目描述中，把它们都成为省份）
+        然后把每个省的字符串，按照:进行拆分，那么:左边的是省份名称，:右边的是该省的各市辖区
+        把34个省存储到一个HashMap集合中，其中编号是key，省份名是value
+        把所有省份的城市存储到一个LinkedHashMap集合中，其中省份名是key，该省份的所有城市用一个ArrayList的集合装起来，然后作为value。
+     */
+    public static void main(String[] args) {
+        //河北、山西、辽宁、吉林、黑龙江、江苏、浙江、安徽、福建、江西、山东、河南、湖北、湖南、广东、海南、四川、贵州、云南、陕西、甘肃、青海、台湾
+        String str = "河北、山西、辽宁、吉林、黑龙江、江苏、浙江、安徽、福建、江西、山东、河南、湖北、湖南、广东、海南、四川、贵州、云南、陕西、甘肃、青海、台湾";
+
+        String[] arr = str.split("、");
+        
+        HashMap<Integer,String> map = new HashMap<>();
+
+        for (int i = 0; i < arr.length; i++) {
+            map.put(i+1,arr[i]);
+        }
+
+        //城市
+        List ln = List.of("丹东","大连","抚顺","本溪","营口","阜新","辽阳","盘锦","铁岭","朝阳","葫芦岛");
+        List hlj = List.of("哈尔滨","齐齐哈尔","牡丹江","佳木斯","大庆","鸡西","双鸭山","鹤岗","七台河","黑河");
+        List jl = List.of("长春","吉林","延边朝鲜族自治州","四平","通化","白山","白城","辽源");
+
+        //
+        LinkedHashMap<String,List> cityMap = new LinkedHashMap<>();
+        cityMap.put(map.get(2),ln);
+        cityMap.put(map.get(3),hlj);
+        cityMap.put(map.get(4),jl);
+
+
+        //输入
+        Scanner scanner = new Scanner(System.in);
+        System.out.println("请选择：");
+        for (Map.Entry<Integer, String> s : map.entrySet()) {
+            System.out.println(s.getKey() + ":" + s.getValue());
+        }
+        //输入索引
+        int index = scanner.nextInt();
+        //value 获取 城市
+        String s = map.get(index);
+        List list = cityMap.get(s);
+
+        //输出
+        System.out.println(list);
+
+    }
+
+
+
+}

JavaSE/day17/src/com/lc/homework/day17/thread/Test01.java

@@ -0,0 +1,18 @@
+package com.lc.homework.day17.thread;
+
+/**
+ * ClassName: Test01
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/15 10:37
+ * @Version 1.0
+ */
+public class Test01 {
+
+    public static void main(String[] args) {
+        //主线程
+        System.out.println(Thread.currentThread().getName());
+
+        System.out.println();
+    }
+}

JavaSE/day17/src/com/lc/homework/day17/thread1/MyThread.java

@@ -0,0 +1,18 @@
+package com.lc.homework.day17.thread1;
+
+/**
+ * ClassName: MyThread
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/15 10:56
+ * @Version 1.0
+ */
+public class MyThread  extends  Thread{
+
+    @Override
+    public void run() {
+        for (int i = 0; i < 100; i++) {
+            System.out.println("mythread1");
+        }
+    }
+}

JavaSE/day17/src/com/lc/homework/day17/thread1/MyThread2.java

@@ -0,0 +1,18 @@
+package com.lc.homework.day17.thread1;
+
+/**
+ * ClassName: MyThread2
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/15 11:04
+ * @Version 1.0
+ */
+public class MyThread2 implements  Runnable{
+
+    @Override
+    public void run() {
+        for (int i = 0; i < 100; i++) {
+            System.out.println("mythread2");
+        }
+    }
+}

JavaSE/day17/src/com/lc/homework/day17/thread1/Test.java

@@ -0,0 +1,32 @@
+package com.lc.homework.day17.thread1;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/15 10:57
+ * @Version 1.0
+ */
+public class Test {
+
+    public static void main(String[] args) {
+
+        // 继承 Thread启动
+        MyThread myThread = new MyThread();
+        myThread.start(); // 主  my子线程  抢占资源。
+        //cpu 抢占
+
+        // 实现Runable
+        MyThread2 myThread2 = new MyThread2();
+        //new Thread
+        Thread thread = new Thread(myThread2);
+        //启动
+        thread.start();
+
+        //主线程 运行100次。
+        for (int i = 0; i < 100 ; i++) {
+            System.out.println("主线程");
+        }
+
+    }
+}

JavaSE/day17/src/com/lc/homework/day17/thread2/Test.java

@@ -0,0 +1,30 @@
+package com.lc.homework.day17.thread2;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/15 11:41
+ * @Version 1.0
+ */
+public class Test {
+
+    public static void main(String[] args) {
+
+        new Thread() {
+            @Override
+            public void run() {
+                System.out.println("匿名 继承 thread");
+            }
+        }.start();
+
+        new Thread(
+            new Runnable() {
+                @Override
+                public void run() {
+                    System.out.println("匿名 实现 runnable");
+                }
+            }
+        ).start();
+    }
+}

JavaSE/day17/src/com/lc/homework/day17/thread3/Test.java

@@ -0,0 +1,36 @@
+package com.lc.homework.day17.thread3;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/15 11:48
+ * @Version 1.0
+ */
+public class Test {
+
+    public static void main(String[] args) {
+
+        /*
+        - public Thread() :分配一个新的线程对象。
+        - public Thread(String name) :分配一个指定名字的新的线程对象。
+        - public Thread(Runnable target) :指定创建线程的目标对象，它实现了Runnable接口中的run方法
+        - public Thread(Runnable target,String name) :分配一个带有指定目标新的线程对象并指定名字。
+
+
+         */
+        Thread thread = new Thread("子线程1");
+        System.out.println(thread.getName());
+
+        //参数1 runable 参数2 名称
+        Thread thread1 = new Thread(new Runnable() {
+            @Override
+            public void run() {
+
+            }
+        }, "子线程2");
+        System.out.println(thread1.getName());
+
+    }
+
+}

JavaSE/day17/src/com/lc/homework/day17/thread3/Test2.java

@@ -0,0 +1,99 @@
+package com.lc.homework.day17.thread3;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/15 11:48
+ * @Version 1.0
+ */
+public class Test2 {
+
+    public static void main(String[] args) throws InterruptedException {
+
+        /*
+        * public void run() :此线程要执行的任务在此处定义代码。
+        * public void start() :导致此线程开始执行; Java虚拟机调用此线程的run方法。
+        * public String getName() :获取当前线程名称。
+        * public void setName(String name)：设置该线程名称。
+        * public static Thread currentThread() :返回对当前正在执行的线程对象的引用。在Thread子类中就是this，通常用于主线程和Runnable实现类
+        * public static void sleep(long millis) :使当前正在执行的线程以指定的毫秒数暂停（暂时停止执行）。
+        * public final boolean isAlive()：测试线程是否处于活动状态。如果线程已经启动且尚未终止，则为活动状态。
+        * void join() ：等待该线程终止。 插队
+          void join(long millis) ：等待该线程终止的时间最长为 millis 毫秒。如果millis时间到，将不再等待。
+          void join(long millis, int nanos) ：等待该线程终止的时间最长为 millis 毫秒 + nanos 纳秒。
+
+         */
+
+        Thread thread = new Thread(){
+            @Override
+            public void run() {
+                try {
+                    Thread.sleep(5000);
+                } catch (InterruptedException e) {
+                    throw new RuntimeException(e);
+                }
+                System.out.println(Thread.currentThread().getName());
+            }
+        };
+        thread.setName("线程1");
+
+//        thread.start();
+
+        Thread thread1 = new Thread() {
+            @Override
+            public void run() {
+
+            }
+        };
+
+//        thread1.start();
+
+        thread1.join();
+        boolean alive = thread1.isAlive();
+        System.out.println(alive);
+
+
+        //主线程
+        Thread thread2 = new Thread() {
+            @Override
+            public void run() {
+                for (int i = 0; i < 10000; i++) {
+                    System.out.println("thread2");
+                }
+
+            }
+        };
+        Thread thread3 = new Thread() {
+            @Override
+            public void run() {
+                try {
+                    thread2.join(1,1);
+                } catch (InterruptedException e) {
+                    throw new RuntimeException(e);
+                }
+                System.out.println("thread3");
+            }
+        };
+        Thread thread4 = new Thread() {
+            @Override
+            public void run() {
+                try {
+                    thread3.join();
+                } catch (InterruptedException e) {
+                    throw new RuntimeException(e);
+                }
+                System.out.println("thread4");
+            }
+        };
+
+        //控制 t1 ，t2 ，t3 线程的执行顺序
+
+        thread2.start();
+        thread3.start();
+        thread4.start();
+
+
+    }
+
+}

JavaSE/day17/src/com/lc/homework/day17/thread4/Test.java

@@ -0,0 +1,56 @@
+package com.lc.homework.day17.thread4;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/15 13:37
+ * @Version 1.0
+ */
+public class Test {
+    public static void main(String[] args) throws InterruptedException {
+        /*
+        - 声明一个匿名内部类继承Thread类，重写run方法，实现打印[1,100]之间的偶数，要求每隔1秒打印1个偶数。
+        - 声明一个匿名内部类继承Thread类，重写run方法，实现打印[1,100]之间的奇数，
+          - 当打印到5时，让奇数线程停下来，让偶数线程执行完再打印。
+         */
+        Thread thread1 = new Thread() {
+            @Override
+            public void run() {
+                for (int i = 0; i < 100; i += 2) {
+                    try {
+                        Thread.sleep(10);
+                    } catch (InterruptedException e) {
+                        throw new RuntimeException(e);
+                    }
+                    System.out.println(i);
+                }
+            }
+        };
+
+        Thread thread2 = new Thread() {
+            @Override
+            public void run() {
+                for (int i = 1; i < 100; i += 2) {
+                    if (i == 5){
+                        try {
+                            thread1.join();
+                        } catch (InterruptedException e) {
+                            throw new RuntimeException(e);
+                        }
+                    }
+                    System.out.println("奇数："+i);
+                }
+            }
+        };
+
+        thread1.start();
+        thread2.start();
+
+        thread1.join();
+        thread2.join();
+
+        System.out.println("执行完成");
+
+    }
+}

JavaSE/day17/src/com/lc/homework/day17/thread5/Test.java

@@ -0,0 +1,79 @@
+package com.lc.homework.day17.thread5;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/15 13:57
+ * @Version 1.0
+ */
+public class Test {
+
+    public static void main(String[] args) throws InterruptedException {
+        List<Integer> list = new ArrayList<>();
+
+        Thread thread = new Thread() {
+            @Override
+            public void run() {
+                for (int i = 1; i <= 10; i++) {
+                    try {
+                        Thread.sleep(1);
+                    } catch (InterruptedException e) {
+                        throw new RuntimeException(e);
+                    }
+                    list.add(i);
+                }
+            }
+        };
+        
+        Thread thread1 = new Thread() {
+            @Override
+            public void run() {
+
+                for (int i = 11; i <= 20; i++) {
+                    try {
+                        Thread.sleep(1);
+                    } catch (InterruptedException e) {
+                        throw new RuntimeException(e);
+                    }
+                    list.add(i);
+                }
+
+            }
+        };
+
+        Thread thread2 = new Thread() {
+            @Override
+            public void run() {
+
+                for (int i = 21; i <= 30; i++) {
+                    try {
+                        Thread.sleep(1);
+                    } catch (InterruptedException e) {
+                        throw new RuntimeException(e);
+                    }
+                    list.add(i);
+                }
+
+            }
+        };
+
+        thread.start();
+        thread1.start();
+        thread2.start();
+
+        thread.join();
+        thread1.join();
+        thread2.join();
+
+        //排序
+        Collections.sort(list);
+
+        System.out.println(list);
+
+    }
+}

JavaSE/day17/src/com/lc/homework/day17/thread5/Test1.java

@@ -0,0 +1,52 @@
+package com.lc.homework.day17.thread5;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/15 13:57
+ * @Version 1.0
+ */
+public class Test1 {
+
+    public static void main(String[] args) throws InterruptedException {
+
+
+        //线程1 执行   hello java
+        new Thread(){
+            @Override
+            public void run() {
+                for (int i = 0; i < 100; i++) {
+                    hello1();
+                }
+            }
+        }.start();
+        //线程2 执行   哈喽  爪洼
+        new Thread(){
+            @Override
+            public void run() {
+                for (int i = 0; i < 100; i++) {
+                    hello2();
+                }
+            }
+        }.start();
+
+        //synchronized 保证 代码 在整个方法中 或者十整个 代码块 不被其他线程打断。
+    }
+
+    public static synchronized void hello1() {
+
+        System.out.print("hello ");
+        System.out.println("java");
+    }
+
+    public static synchronized void hello2() {
+        System.out.print("哈喽 ");
+        //被打断了  不应该被打断。
+        System.out.println("爪洼 ");
+    }
+}

JavaSE/day17/src/com/lc/homework/day17/thread6/Test.java

@@ -0,0 +1,52 @@
+package com.lc.homework.day17.thread6;
+
+/**
+ * ClassName: Test
+ *
+ * @Author 爱扣钉-陈晨
+ * @Create 2024/1/15 15:19
+ * @Version 1.0
+ */
+public class Test {
+
+    public static void main(String[] args) {
+        Tikcet tikcet1 = new Tikcet(); // new 100
+        Tikcet tikcet2 = new Tikcet(); // new 100  不属于同一个资源。
+        new Thread("窗口1"){
+            @Override
+            public void run() {
+                for (int i = 0; i < 100 ; i++) {
+                    tikcet1.sale();
+                }
+            }
+        }.start();
+
+        new Thread("窗口2"){
+            @Override
+            public void run() {
+                for (int i = 0; i < 100 ; i++) {
+                    tikcet1.sale();
+                }
+            }
+        }.start();
+
+        new Thread("窗口3"){
+            @Override
+            public void run() {
+                for (int i = 0; i < 100 ; i++) {
+                    tikcet1.sale();
+                }
+            }
+        }.start();
+
+        new Thread("窗口4"){
+            @Override
+            public void run() {
+                for (int i = 0; i < 100 ; i++) {
+                    tikcet1.sale();
+                }
+            }
+        }.start();
+
+    }
+}