<!--版本依赖管理-->
        <properties>
            <mybatis-plus-gene.version>3.4.1</mybatis-plus-gene.version>
            <velocity.version>2.0</velocity.version>
        </properties>

        <!--mybatis-plus 逆向生成-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>${mybatis-plus-gene.version}</version>
        </dependency>

        <!-- velocity 模板引擎, Mybatis Plus 代码生成器需要 -->
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity-engine-core</artifactId>
            <version>${velocity.version}</version>
        </dependency>        

package com.example.springbootdemo;

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.DateType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import org.junit.Test;

/**
 * @description: CodeGenerator <br>
 * @date: 2022/12/25 14:19 <br>
 * @author: William <br>
 * @version: 1.0 <br>
 */
public class CodeGenerator {

    @Test
    public void run() {

        // 1、创建代码生成器
        AutoGenerator mpg = new AutoGenerator();
        // 2、全局配置
        GlobalConfig gc = new GlobalConfig();
        //获取当前项目的路径
        String projectPath = System.getProperty("user.dir");
        //拼接代码生成以后存放的目录
        gc.setOutputDir(projectPath + "/src/main/java");
        gc.setAuthor("William");
        //生成后是否打开资源管理器
        gc.setOpen(false);
        //重新生成时文件是否覆盖
        gc.setFileOverride(true);
        //去掉Service接口的首字母I
        gc.setServiceName("%sService");
        //主键策略
        gc.setIdType(IdType.AUTO);
        //定义生成的实体类中日期类型
        gc.setDateType(DateType.ONLY_DATE);
        //开启Swagger2模式
        gc.setSwagger2(true);
        mpg.setGlobalConfig(gc);

        // 3、数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setUrl("jdbc:mysql://localhost:3306/test?serverTimezone=GMT%2B8");
        dsc.setDriverName("com.mysql.cj.jdbc.Driver");
        dsc.setUsername("root");
        dsc.setPassword("123456");
        dsc.setDbType(DbType.MYSQL);
        mpg.setDataSource(dsc);

        // 4、包配置
        PackageConfig pc = new PackageConfig();
        pc.setParent("com.example.springbootdemo");
        //pc.setModuleName("user"); //模块名,多模块开发,或者微服务模块使用,也可以配置接口版本号,例如:v1
        pc.setController("controller");
        pc.setEntity("entity");
        pc.setService("service");
        pc.setMapper("mapper");
        mpg.setPackageInfo(pc);

        // 5、策略配置
        StrategyConfig strategy = new StrategyConfig();
        //需要逆向的表名
        strategy.setInclude("user");
        strategy.setNaming(NamingStrategy.underline_to_camel);//数据库表映射到实体的命名策略
        //strategy.setTablePrefix(pc.getModuleName() + "_"); //生成实体时去掉表前缀
        strategy.setColumnNaming(NamingStrategy.underline_to_camel);//数据库表字段映射到实体的命名策略
        strategy.setEntityLombokModel(true); // lombok 模型 @Accessors(chain = true) setter链式操作
        strategy.setRestControllerStyle(true); //restful api风格控制器
        strategy.setControllerMappingHyphenStyle(true); //url中驼峰转连字符
        mpg.setStrategy(strategy);


        // 6、执行
        mpg.execute();
    }
}

package com.example.springbootdemo.controller;


import com.example.springbootdemo.entity.User;
import com.example.springbootdemo.service.UserService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import net.bytebuddy.asm.Advice;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;

/**
 * <p>
 *  前端控制器
 * </p>
 *
 * @author William
 * @since 2022-12-25
 */
@Api(tags = "用户相关接口")
@RestController
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;


    @ApiOperation(value = "根据用户ID获取用户信息")
    @GetMapping("/{id}")
    public String getUser(@PathVariable("id") Integer id){
        if(id == null || id <= 0){
            return "参数错误！";
        }
        User user = userService.getById(id);
        if(user == null){
            return "当前用户不存在，参数错误";
        }
        return user.toString();
    }

}