Mybatis-Plus网址：https://baomidou.com/pages/779a6e/#%E4%BD%BF%E7%94%A8

第一步：引入依赖

<!-- 代码生成器 -->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-generator</artifactId>
    <version>3.5.1</version>
</dependency>
<dependency>
    <groupId>org.apache.velocity</groupId>
    <artifactId>velocity</artifactId>
    <version>1.7</version>
</dependency>

第二步：创建utils包，创建CodeGenerator.java

有很多内容是根据自己项目的具体情况设置，注意看注释

package com.qing.springboot.utils;

/**
 * ClassName: CodeGenerator
 * Description:
 *
 * @Author Dong
 * @Create 2024/7/20 17:52
 * @Version 1.0
 */


import com.baomidou.mybatisplus.generator.FastAutoGenerator;
import com.baomidou.mybatisplus.generator.config.OutputFile;

import java.util.Collections;

public class CodeGenerator {

    public static void main(String[] args) {
        generate();
    }

    private static void generate() {
        FastAutoGenerator.create("jdbc:mysql://localhost:3306/qing?serverTimezone=GMT%2b8", "root", "Liu.2004310")
                .globalConfig(builder -> {
                    builder.author("Dong") // 设置作者
                            .enableSwagger() // 开启 swagger 模式
                            .fileOverride() // 覆盖已生成文件
                            .outputDir("D:\\003-Code\\002-project_code\\xiao_bai_bi_she\\Spring\\springboot\\src\\main\\java\\"); // 指定输出目录
                })
                .packageConfig(builder -> {
                    builder.parent("com.qing.springboot") // 设置父包名
                            .moduleName(null) // 设置父包模块名
                            .pathInfo(Collections.singletonMap(OutputFile.mapperXml, "D:\\003-Code\\002-project_code\\xiao_bai_bi_she\\Spring\\springboot\\src\\main\\resources\\mapper\\")); // 设置mapperXml生成路径
                })
                .strategyConfig(builder -> {
                    builder.entityBuilder().enableLombok();
                    builder.mapperBuilder().enableMapperAnnotation().build();
                    builder.controllerBuilder().enableHyphenStyle()  // 开启驼峰转连字符
                            .enableRestStyle();  // 开启生成@RestController 控制器
                    builder.addInclude("sys_user") // 设置需要生成的表名
                            .addTablePrefix("t_", "sys_"); // 设置过滤表前缀
                })
//                .templateEngine(new FreemarkerTemplateEngine()) // 使用Freemarker引擎模板，默认的是Velocity引擎模板
                .execute();

    }
}

点击运行就可以生成代码，注意和路径相关的不要写错。

参考：

第三步：此时Controller类为空需要如下配置：

此配置可根据项目需要自行添加或更改。

resources包下的templates包里的controller.java.vm文件

package ${package.Controller};


import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import org.springframework.web.bind.annotation.*;
import javax.annotation.Resource;
import java.util.List;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

import ${package.Service}.${table.serviceName};
import ${package.Entity}.${entity};

#if(${restControllerStyle})
import org.springframework.web.bind.annotation.RestController;
#else
import org.springframework.stereotype.Controller;
#end
#if(${superControllerClassPackage})
import ${superControllerClassPackage};
#end

/**
 * <p>
 * $!{table.comment} 前端控制器
 * </p>
 *
 * @author ${author}
 * @since ${date}
 */
#if(${restControllerStyle})
@RestController
#else
@Controller
#end
@RequestMapping("#if(${package.ModuleName})/${package.ModuleName}#end/#if(${controllerMappingHyphenStyle})${controllerMappingHyphen}#else${table.entityPath}#end")
#if(${kotlin})
class ${table.controllerName}#if(${superControllerClass}) : ${superControllerClass}()#end

#else
    #if(${superControllerClass})
    public class ${table.controllerName} extends ${superControllerClass} {
    #else
    public class ${table.controllerName} {
    #end

@Resource
private ${table.serviceName} ${table.entityPath}Service;

// 新增或者更新
@PostMapping
public boolean save(@RequestBody ${entity} ${table.entityPath}) {
        return ${table.entityPath}Service.saveOrUpdate(${table.entityPath});
        }

@DeleteMapping("/{id}")
public Boolean delete(@PathVariable Integer id) {
        return ${table.entityPath}Service.removeById(id);
        }

@PostMapping("/del/batch")
public boolean deleteBatch(@RequestBody List<Integer> ids) {
        return ${table.entityPath}Service.removeByIds(ids);
        }

@GetMapping
public List<${entity}> findAll() {
        return ${table.entityPath}Service.list();
        }

@GetMapping("/{id}")
public ${entity} findOne(@PathVariable Integer id) {
        return ${table.entityPath}Service.getById(id);
        }

@GetMapping("/page")
public Page<${entity}> findPage(@RequestParam Integer pageNum,
@RequestParam Integer pageSize) {
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.orderByDesc("id");
        return ${table.entityPath}Service.page(new Page<>(pageNum, pageSize), queryWrapper);
        }

        }

#end

第四：最后根据自己项目需要更改相关内容。