Spring Boot与MyBatis-Plus：代码逆向生成指南

在Spring Boot项目中使用MyBatis-Plus进行代码逆向生成，可以通过MyBatis-Plus提供的代码生成器来快速生成实体类、Mapper接口、Service接口及其实现类等。以下是一个简单的示例步骤：

代码逆向生成 

1.添加依赖：

在pom.xml文件中添加MyBatis-Plus和代码生成器相关的依赖。

<!-- Spring Boot Starter Data JPA -->
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<!-- MyBatis-Plus -->
<dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>3.5.7</version>
</dependency>
<!-- MyBatis-Plus Generator -->
<dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-generator</artifactId><version>3.5.7</version>
</dependency>
<dependency><groupId>org.freemarker</groupId><artifactId>freemarker</artifactId><version>2.3.31</version> <!-- 使用合适的版本号 -->
</dependency>
<!-- MySQL 驱动 -->
<dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.23</version>
</dependency>

2.写代码生成器：

创建一个Java类，用于配置和运行代码生成器。

public class CodeGenerator {// 你的数据库连接信息private static final String URL = "jdbc:mysql://localhost:3306/my_db?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=UTC";private static final String USERNAME = "root";private static final String PASSWORD = "123456";public static void main(String[] args) {FastAutoGenerator.create(URL, USERNAME, PASSWORD).globalConfig(builder -> builder.author("xiaochen").outputDir(Paths.get(System.getProperty("user.dir")) + "/src/main/java").commentDate("yyyy-MM-dd").enableSwagger()).packageConfig(builder -> builder.parent("com.demo").entity("entity").controller("controller").service("service").serviceImpl("service.impl").mapper("mapper").xml("mapper.xml")).strategyConfig(builder -> builder.addInclude("user_test").entityBuilder().enableLombok()).templateEngine(new FreemarkerTemplateEngine()).execute();}
}

3.运行代码生成器：

运行CodeGenerator类的main方法，代码生成器将会根据配置生成相应的代码文件。

通过以上步骤，你可以快速生成MyBatis-Plus所需的实体类、Mapper接口、Service接口及其实现类等代码，大大提高开发效率。

续：

当然也可以自定义controller,配置如下：

1.修改controller模板 

将其放在 resources 下的 templates 目录下

package ${package.Controller};import org.springframework.web.bind.annotation.RequestMapping;
<#if restControllerStyle>
import org.springframework.web.bind.annotation.RestController;
<#else>
import org.springframework.stereotype.Controller;
</#if>
<#if superControllerClassPackage??>
import ${superControllerClassPackage};
</#if>
import ${package.Entity}.${entity};
<#if generateService>
import ${package.Service}.${table.serviceName};
</#if>
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestParam;
import java.util.List;/*** <p>* ${table.comment!} 前端 控制器* </p>** @author ${author}* @since ${date}*/
<#if restControllerStyle>
@RestController
<#else>
@Controller
</#if>
@RequestMapping("<#if package.ModuleName?? && package.ModuleName != "">/${package.ModuleName}</#if>/<#if controllerMappingHyphenStyle>${controllerMappingHyphen}<#else>${table.entityPath}</#if>")
<#if kotlin>
class ${table.controllerName}<#if superControllerClass??> : ${superControllerClass}()</#if>
<#else>
<#if superControllerClass??>
public class ${table.controllerName} extends ${superControllerClass} {
<#else>
public class ${table.controllerName} {
</#if>@Autowiredprivate ${table.serviceName} ${(table.serviceName?substring(1))?uncap_first};/*** 查询所有*/@GetMappingpublic List<${entity}> getAll() {return ${(table.serviceName?substring(1))?uncap_first}.list();}/*** 根据id查询*/@GetMapping("/{id}")public  ${entity} getById(@PathVariable Long id) {return ${(table.serviceName?substring(1))?uncap_first}.getById(id);}/*** 添加*/@PostMappingpublic boolean add(@RequestBody ${entity} ${entity?uncap_first}) {return ${(table.serviceName?substring(1))?uncap_first}.save(${entity?uncap_first});}/*** 修改*/@PutMapping("/{id}")public boolean update(@PathVariable Integer id, @RequestBody  ${entity} ${entity?uncap_first}) {${entity?uncap_first}.setId(id);return ${(table.serviceName?substring(1))?uncap_first}.updateById(${entity?uncap_first});}/*** 删除*/@DeleteMapping("/{id}")public boolean delete(@PathVariable Long id) {return ${(table.serviceName?substring(1))?uncap_first}.removeById(id);}
}
</#if>

2.在strategyConfig配置中添加如下代码

.controllerBuilder().enableRestStyle().template("templates/controller.java")

 3.测试：

生成效果如下：

/*** <p>*  前端 控制器* </p>** @author xiaochen* @since 2024-07-05*/
@RestController
@RequestMapping("/userTest")
public class UserTestController {@Autowiredprivate IUserTestService userTestService;/*** 查询所有*/@GetMappingpublic List<UserTest> getAll() {return userTestService.list();}/*** 根据id查询*/@GetMapping("/{id}")public  UserTest getById(@PathVariable Long id) {return userTestService.getById(id);}/*** 添加*/@PostMappingpublic boolean add(@RequestBody UserTest userTest) {return userTestService.save(userTest);}/*** 修改*/@PutMapping("/{id}")public boolean update(@PathVariable Integer id, @RequestBody  UserTest userTest) {userTest.setId(id);return userTestService.updateById(userTest);}/*** 删除*/@DeleteMapping("/{id}")public boolean delete(@PathVariable Long id) {return userTestService.removeById(id);}
}