使用MyBatis Plus需要用上的相关依赖

1.pom.xml添加

        <!--MyBatisPlus依赖-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.2</version>
        </dependency>

         <!--自动生成后端代码-->        
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.3.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity</artifactId>
            <version>1.7</version>
        </dependency>

        <!--mysql驱动依赖-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>

        <!--数据库连接池druid-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.20</version>
        </dependency>
        
        <!--热部署配置-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>

2.application.properties配置

#设置端口号
server.port=8088
#热部署生效
spring.devtools.restart.enabled=true
#热部署生效目录
spring.devtools.restart.additional-paths=src/main/java
#设置classpath目录下的WEB-INF文件夹内容修改不重启
spring.devtools.restart.exclude=static/**

spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/mydb?useSSL=false
spring.datasource.username=root
spring.datasource.password=123456
mybatis-plus.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl

3.mybatis-plus自动生成代码（基础版）

第3点转载于博主：【Java】mybatis-plus自动生成代码（基础版）_mybatisplus 自动生成代码-CSDN博客

基础版自动生成代码，根据数据库表的结构，自动创建对应的实体类、mapper接口、mapper.xml文件、service接口和controller类

public static void main(String[] args) {
        //创建对象
        AutoGenerator autoGenerator = new AutoGenerator();
        //数据源
        DataSourceConfig dataSourceConfig = new DataSourceConfig();
        dataSourceConfig.setDbType(DbType.MYSQL);
        dataSourceConfig.setDriverName("com.mysql.cj.jdbc.Driver");
        dataSourceConfig.setUrl("jdbc:mysql://localhost:3306/数据库名?useSSL=false"); //这里填写mysql端口+数据库名
        dataSourceConfig.setUsername("root");  //mysql用户名
        dataSourceConfig.setPassword("password");  //mysql密码
        autoGenerator.setDataSource(dataSourceConfig);
        //全局配置
        GlobalConfig globalConfig = new GlobalConfig();
        globalConfig.setOutputDir("D:\\IdeaProject\\项目名\\src\\main\\java");  //这里填写生成代码存放的地址
        //globalConfig.setOutputDir(System.getProperty("user.dir")+"/src/main/java");
        globalConfig.setAuthor("admin");
        globalConfig.setOpen(false);
        //去掉Service的I
        globalConfig.setServiceName("%sService");
        autoGenerator.setGlobalConfig(globalConfig);
        //包配置
        PackageConfig packageConfig = new PackageConfig();
        packageConfig.setParent("com.bing");  //这里填写自己的包名
        packageConfig.setEntity("entity");
        packageConfig.setMapper("mapper");
        packageConfig.setService("service");
        packageConfig.setServiceImpl("service.impl");
        packageConfig.setController("controller");
        autoGenerator.setPackageInfo(packageConfig);
        //策略配置
        StrategyConfig strategyConfig = new StrategyConfig();
        //全部的表
        strategyConfig.setInclude("xxx","yyy");  //需要自动生成哪些表的内容，全部列举在这里
        strategyConfig.setNaming(NamingStrategy.underline_to_camel);
        strategyConfig.setColumnNaming(NamingStrategy.underline_to_camel);
        strategyConfig.setEntityLombokModel(true);
        autoGenerator.setStrategy(strategyConfig);
        //启动
        autoGenerator.execute();
    }