springBoot和mybaitsplus实现供管理后台使用的用户列表(列表中需要显示余额、做分页)、编辑、删除接口。(必做)

好的，下面是详细的实现步骤： 1. 在Maven项目中添加Spring Boot和Mybatis Plus的依赖，在pom.xml文件中添加以下依赖： ``` <dependencies> <!-- Spring Boot --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- Mybatis Plus --> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.4.3.1</version> </dependency> <!-- MySQL 驱动 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.25</version> </dependency> </dependencies> ``` 2. 创建用户表，并使用Mybatis Plus的注解进行表映射。在src/main/java目录下创建一个com.example.entity包，创建User实体类： ``` package com.example.entity; import com.baomidou.mybatisplus.annotation.IdType; import com.baomidou.mybatisplus.annotation.TableField; import com.baomidou.mybatisplus.annotation.TableId; import com.baomidou.mybatisplus.annotation.TableName; import lombok.Data; @Data @TableName("user") public class User { @TableId(value = "id", type = IdType.AUTO) private Long id; @TableField(value = "username") private String username; @TableField(value = "password") private String password; @TableField(value = "balance") private Double balance; } ``` 3. 创建UserMapper接口，继承Mybatis Plus提供的BaseMapper接口，用于提供基本的增删改查操作。在src/main/java目录下创建一个com.example.mapper包，创建UserMapper接口： ``` package com.example.mapper; import com.baomidou.mybatisplus.core.mapper.BaseMapper; import com.example.entity.User; public interface UserMapper extends BaseMapper<User> { } ``` 4. 创建UserService类，实现用户列表、编辑、删除等业务逻辑。在src/main/java目录下创建一个com.example.service包，创建UserService类： ``` package com.example.service; import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper; import com.baomidou.mybatisplus.extension.plugins.pagination.Page; import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl; import com.example.entity.User; import com.example.mapper.UserMapper; import org.springframework.stereotype.Service; @Service public class UserService extends ServiceImpl<UserMapper, User> { public Page<User> getUserList(int pageNum, int pageSize) { Page<User> page = new Page<>(pageNum, pageSize); QueryWrapper<User> wrapper = new QueryWrapper<>(); wrapper.orderByAsc("id"); return baseMapper.selectPage(page, wrapper); } public User getUserById(Long id) { return baseMapper.selectById(id); } public void saveUser(User user) { baseMapper.insert(user); } public void updateUser(User user) { baseMapper.updateById(user); } public void deleteUser(Long id) { baseMapper.deleteById(id); } } ``` 5. 创建UserController类，提供RESTful接口，用于前端页面调用。在src/main/java目录下创建一个com.example.controller包，创建UserController类： ``` package com.example.controller; import com.baomidou.mybatisplus.extension.plugins.pagination.Page; import com.example.entity.User; import com.example.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; @RestController @RequestMapping("/users") public class UserController { @Autowired private UserService userService; @GetMapping("") public Page<User> getUserList(@RequestParam(defaultValue = "1") int pageNum, @RequestParam(defaultValue = "10") int pageSize) { return userService.getUserList(pageNum, pageSize); } @GetMapping("/{id}") public User getUserById(@PathVariable Long id) { return userService.getUserById(id); } @PostMapping("") public void saveUser(@RequestBody User user) { userService.saveUser(user); } @PutMapping("/{id}") public void updateUser(@PathVariable Long id, @RequestBody User user) { user.setId(id); userService.updateUser(user); } @DeleteMapping("/{id}") public void deleteUser(@PathVariable Long id) { userService.deleteUser(id); } } ``` 6. 在src/main/resources/application.properties文件中添加数据库连接配置： ``` spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai spring.datasource.username=root spring.datasource.password=root spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver mybatis-plus.mapper-locations=classpath:mapper/*.xml ``` 7. 在启动类中添加注解@EnableTransactionManagement，开启事务管理。在src/main/java目录下创建一个com.example包，创建启动类Application： ``` package com.example; import org.mybatis.spring.annotation.MapperScan; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.transaction.annotation.EnableTransactionManagement; @EnableTransactionManagement @SpringBootApplication @MapperScan("com.example.mapper") public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } } ``` 8. 在前端页面中，使用Vue或React等框架，调用后端接口，实现用户列表的展示、编辑、删除等操作。 希望这些步骤能够对您有所帮助，如果还有其他问题，可以随时继续提问。