在前后端分离的情况下,我们经常会定义一个统一的反回数据格式,通常都会包含状态码,返回信息,返回的数据,是否成功等参数。
单独定义了一个ReturnCode
枚举类用于存储代码和返回的Message
public enum ResultCode {
//成功
SUCCESS(200),
// 失败
FAIL(400),
// 未认证(签名错误)
UNAUTHORIZED(401),
// 接口不存在
NOT_FOUND(404),
// 服务器内部错误
INTERNAL_SERVER_ERROR(500);
public int code;
ResultCode(int code)
{
this.code=code;
}
}
/*
统一返回信息
*/
public class ResponseResult {
public int code; //返回状态码200成功
private String msg; //返回描述信息
private T data; //返回内容体
public ResponseResult setCode(ResultCode retCode) {
this.code = retCode.code;
return this;
}
public int getCode() {
return code;
}
public ResponseResult setCode(int code) {
this.code = code;
return this;
}
public String getMsg() {
return msg;
}
public ResponseResult setMsg(String msg) {
this.msg = msg;
return this;
}
public T getData() {
return data;
}
public ResponseResult setData(T data) {
this.data = data;
return this;
}
}
在定义一个统一返回类:
public class Response {
private final static String SUCCESS = "success";
private final static String FAIL = "fail";
public static ResponseResult makeOKRsp() {
return new ResponseResult().setCode(ResultCode.SUCCESS).setMsg(SUCCESS);
}
public static ResponseResult makeOKRsp(String message) {
return new ResponseResult().setCode(ResultCode.SUCCESS).setMsg(message);
}
public static ResponseResult makeOKRsp(T data) {
return new ResponseResult().setCode(ResultCode.SUCCESS).setMsg(SUCCESS).setData(data);
}
public static ResponseResult makeErrRsp(String message) {
return new ResponseResult().setCode(ResultCode.INTERNAL_SERVER_ERROR).setMsg(message);
}
public static ResponseResult makeRsp(int code, String msg) {
return new ResponseResult().setCode(code).setMsg(msg);
}
public static ResponseResult makeRsp(int code, String msg, T data) {
return new ResponseResult().setCode(code).setMsg(msg).setData(data);
}
}
新建测试用户接口类
package com.example.demo.service;
import com.example.demo.entity.User;
public interface IUserService {
public User getUserInfo();
}
新建测试用户信息服务类
package com.example.demo.service.impl;
import com.example.demo.entity.User;
import com.example.demo.service.UserService;
import org.springframework.stereotype.Service;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.logging.SimpleFormatter;
@Service
public class UserServiceImpl implements IUserService {
public User getUserInfo(){
User user = new User();
user.setName("jack");
user.setPassword(12341234);
return user;
}
}
@Autowired
UserService service;
@RequestMapping(value = "/getUserItem",method = RequestMethod.GET)
public ResponseResult getUserItem(){
try {
User user = service.getUserInfo();
String[] arr= new String[]{"测试"};
return Response.makeOKRsp(user);
}catch (Exception e)
{
return Response.makeErrRsp("查询用户信息异常");
}
}
返回结果:
/**
* 全局异常处理
*/
@RestControllerAdvice
public class GlobalExceptionHandler {
/*============= 请求错误 start ==============================================*/
/**
* HTTP 请求方式不支持异常
* HttpRequestMethodNotSupportedException
* @return {@link ResponseResult}
*/
@ExceptionHandler(value = HttpRequestMethodNotSupportedException.class)
public ResponseResult httpRequestMethodNotSupportException(HttpRequestMethodNotSupportedException e, HttpServletRequest request) {
return Response.makeErrRsp("请求方式不支持异常");
}
/*============= 请求错误 end ==============================================*/
}
修改一下getUserItem让其抛出自定义查询返回null的异常:
源码:https://github.com/LeeCurtain/demo.git