springboot中返回result类的具体代码controller，util,

以下是一个使用Spring Boot返回Result类的示例代码：

Controller层：

@RestController
@RequestMapping("/api")
public class UserController {
    @Autowired
    private UserService userService;

    @GetMapping("/users")
    public Result<List<User>> getAllUsers() {
        List<User> userList = userService.getAllUsers();
        return Result.success(userList);
    }

    @GetMapping("/users/{id}")
    public Result<User> getUserById(@PathVariable("id") Long id) {
        User user = userService.getUserById(id);
        return Result.success(user);
    }

    @PostMapping("/users")
    public Result<User> createUser(@RequestBody User user) {
        User newUser = userService.createUser(user);
        return Result.success(newUser);
    }

    @PutMapping("/users/{id}")
    public Result<User> updateUser(@PathVariable("id") Long id, @RequestBody User user) {
        User updatedUser = userService.updateUser(id, user);
        return Result.success(updatedUser);
    }

    @DeleteMapping("/users/{id}")
    public Result deleteUser(@PathVariable("id") Long id) {
        userService.deleteUser(id);
        return Result.success();
    }
}

Util层：

public class Result<T> {
    private int code;
    private String message;
    private T data;

    public Result() {
    }

    public Result(int code, String message) {
        this.code = code;
        this.message = message;
    }

    public Result(int code, String message, T data) {
        this.code = code;
        this.message = message;
        this.data = data;
    }

    public static <T> Result<T> success() {
        return new Result<>(ResultCode.SUCCESS.getCode(), ResultCode.SUCCESS.getMessage());
    }

    public static <T> Result<T> success(T data) {
        return new Result<>(ResultCode.SUCCESS.getCode(), ResultCode.SUCCESS.getMessage(), data);
    }

    public static <T> Result<T> failure(ResultCode resultCode) {
        return new Result<>(resultCode.getCode(), resultCode.getMessage());
    }

    public static <T> Result<T> failure(ResultCode resultCode, String message) {
        return new Result<>(resultCode.getCode(), message);
    }

    // getters and setters
}

其中，Result类是一个泛型类，可以根据需要返回不同类型的数据。在这个示例中，我们使用了一个枚举类ResultCode来定义返回结果的状态码和信息。

public enum ResultCode {
    SUCCESS(200, "成功"),
    FAILURE(400, "失败"),
    UNAUTHORIZED(401, "未认证"),
    NOT_FOUND(404, "不存在"),
    INTERNAL_SERVER_ERROR(500, "内部服务器错误");

    private final int code;
    private final String message;

    ResultCode(int code, String message) {
        this.code = code;
        this.message = message;
    }

    public int getCode() {
        return code;
    }

    public String getMessage() {
        return message;
    }
}