子查询， 自定义SQL

travel/dao/src/main/resources/com/lc/dao/TravelItemDao.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 <mapper namespace="com.lc.dao.TravelItemDao">
+
     <resultMap id="BaseResultMap" type="com.lc.pojo.TravelItemPojo">
         <id column="id" jdbcType="INTEGER" property="id" />
         <result column="code" jdbcType="VARCHAR" property="code" />

travel/mbg/src/main/java/com/cl/mbg/MbgApplication.java

@@ -1,15 +0,0 @@
-package com.cl.mbg;
-
-import org.mybatis.spring.annotation.MapperScan;
-import org.springframework.boot.SpringApplication;
-import org.springframework.boot.autoconfigure.SpringBootApplication;
-
-@SpringBootApplication
-@MapperScan("com.cl.mbg.mapper")
-public class MbgApplication {
-
-    public static void main(String[] args) {
-        SpringApplication.run(MbgApplication.class, args);
-    }
-
-}