pom

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.0.5</version>
        </dependency>

<!--        代码生成-->
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity-engine-core</artifactId>
            <version>2.2</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.37</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>2.7.0</version>
        </dependency>
    </dependencies>

yml

spring:
  datasource:
    username: root
    password: 123456
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/db_qyc?serverTimezone=GMT%2B8

生成器

package com.qyc.plus;


import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
import com.baomidou.mybatisplus.generator.config.GlobalConfig;
import com.baomidou.mybatisplus.generator.config.PackageConfig;
import com.baomidou.mybatisplus.generator.config.StrategyConfig;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class PlusApplicationTests {

    @Test
    void contextLoads() {
        //创建代码生成器
        AutoGenerator autoGenerator = new AutoGenerator();

        //全局配置
        GlobalConfig globalConfig = new GlobalConfig();
//        String path = System.getProperty("user.dir");
//        System.out.println(path);
        String path = "G:\\IDEA source\\plus";
        globalConfig.setOutputDir(path+"/src/main/java");
        globalConfig.setAuthor("testjava");
        globalConfig.setOpen(false);
        globalConfig.setFileOverride(false);  //不覆盖
        globalConfig.setServiceName("%sService"); //去掉接口首字母I
        globalConfig.setIdType(IdType.AUTO);  //主键生成策略
        globalConfig.setSwagger2(true); //开启swagger2模式
        autoGenerator.setGlobalConfig(globalConfig);

        //数据源配置
        DataSourceConfig dataSourceConfig = new DataSourceConfig();
        dataSourceConfig.setUrl("jdbc:mysql://localhost:3306/db_qyc?serverTimezone=GMT%2B8");
        dataSourceConfig.setDriverName("com.mysql.jdbc.Driver");
        dataSourceConfig.setUsername("root");
        dataSourceConfig.setPassword("123456");
        dataSourceConfig.setDbType(DbType.MYSQL);
        autoGenerator.setDataSource(dataSourceConfig);

        //包配置
        PackageConfig packageConfig = new PackageConfig();
        packageConfig.setParent("com.qyc");
        packageConfig.setModuleName("plus");
        packageConfig.setController("controller");
        packageConfig.setEntity("bean");
        packageConfig.setService("service");
        packageConfig.setMapper("mapper");
        autoGenerator.setPackageInfo(packageConfig);

        //策略配置
        StrategyConfig strategyConfig = new StrategyConfig();
        strategyConfig.setInclude("user"); //表
        strategyConfig.setNaming(NamingStrategy.underline_to_camel); //库表映射策略
        strategyConfig.setTablePrefix(packageConfig.getModuleName()+"_"); //生成实体是去掉表前缀
        strategyConfig.setColumnNaming(NamingStrategy.underline_to_camel); //字段映射策略
        strategyConfig.setEntityLombokModel(true); //lombok模型
        strategyConfig.setRestControllerStyle(true);
        strategyConfig.setControllerMappingHyphenStyle(true);
        autoGenerator.setStrategy(strategyConfig);
        autoGenerator.execute();
    }

}