基于前后端分离技术做增删改查操作（SpringBoot+Mybatis Plus+Vue）

以下是一个简化的示例，展示了如何在前后端分离的项目中使用Spring Boot和MyBatis Plus进行增删改查操作。

后端代码（Spring Boot）:

// UserController.java
@RestController
@RequestMapping("/api/users")
public class UserController {
 
    @Autowired
�     private UserService userService;
 
    @GetMapping
    public List<User> getAllUsers() {
        return userService.list();
    }
 
    @GetMapping("/{id}")
    public User getUserById(@PathVariable("id") Long id) {
        return userService.getById(id);
    }
 
    @PostMapping
    public boolean createUser(User user) {
        return userService.save(user);
    }
 
    @PutMapping("/{id}")
    public boolean updateUser(@PathVariable("id") Long id, User user) {
        user.setId(id);
        return userService.updateById(user);
    }
 
    @DeleteMapping("/{id}")
    public boolean deleteUser(@PathVariable("id") Long id) {
        return userService.removeById(id);
    }
}
 
// UserService.java
@Service
public class UserService {
 
    @Autowired
    private UserMapper userMapper;
 
    public List<User> list() {
        return userMapper.selectList(null);
    }
 
    public User getById(Long id) {
        return userMapper.selectById(id);
    }
 
    public boolean save(User user) {
        return userMapper.insert(user) > 0;
    }
 
    public boolean updateById(User user) {
        return userMapper.updateById(user) > 0;
    }
 
    public boolean removeById(Long id) {
        return userMapper.deleteById(id) > 0;
    }
}
 
// UserMapper.java
@Mapper
public interface UserMapper extends BaseMapper<User> {
}

前端代码（Vue.js）:

// UserService.js
import axios from 'axios';
 
export default {
    getAllUsers() {
        return axios.get('/api/users');
    },
    getUserById(id) {
        return axios.get('/api/users/' + id);
    },
    createUser(user) {
        return axios.post('/api/users', user);
    },
    updateUser(id, user) {
        return axios.put('/