4.0.0 org.example day16 pom 1.0 demo 8.0.30 4.13.2 1.7.20 1.2.3 3.1.0 mysql mysql-connector-java ${mysql.version} junit junit ${junit.version} org.slf4j slf4j-api ${slf4j.version} ch.qos.logback logback-classic ${logback.version} com.baomidou mybatis-plus ${mybatis.plus.version}