（三）SpringBoot定義統一返回result對象

一：定義響應碼枚舉

package com.example.demo.core.ret;

/**
 * @Description: 響應碼枚舉，參考HTTP狀態碼的語義
 * @author 
 * @date 2018/4/19 09:42
 */
public enum RetCode {

   // 成功
   SUCCESS(200),

   // 失敗
   FAIL(400),

   // 未認證（簽名錯誤）
   UNAUTHORIZED(401),

   // 接口不存在
   NOT_FOUND(404),

   // 服務器內部錯誤
   INTERNAL_SERVER_ERROR(500);

   public int code;

   RetCode(int code) {
      this.code = code;
   }
}

　　

二：創建返回對象實體（泛型）

package com.example.demo.core.ret;

import java.io.Serializable;

import com.alibaba.fastjson.JSON;

/**
 * @Description: 返回對象實體
 * @author 
 * @date 2018/4/19 09:43
 */
public class RetResult<T> {

   public int code;

   private String msg;

   private T data;

   public RetResult<T> setCode(RetCode retCode) {
      this.code = retCode.code;
      return this;
   }

   public int getCode() {
      return code;
   }

   public RetResult<T> setCode(int code) {
      this.code = code;
      return this;
   }

   public String getMsg() {
      return msg;
   }

   public RetResult<T> setMsg(String msg) {
      this.msg = msg;
      return this;
   }

   public T getData() {
      return data;
   }

   public RetResult<T> setData(T data) {
      this.data = data;
      return this;
   }

}

　　說明：code為狀態碼、msg為提示信息、data為返回的數據

 

四：返回結果數據格式封裝

package com.example.demo.core.ret;

/**
 * @Description: 將結果轉換為封裝后的對象
 * @author 
 * @date 2018/4/19 09:45
 */
public class RetResponse {

   private final static String SUCCESS = "success";

   public static <T> RetResult<T> makeOKRsp() {
      return new RetResult<T>().setCode(RetCode.SUCCESS).setMsg(SUCCESS);
   }

   public static <T> RetResult<T> makeOKRsp(T data) {
      return new RetResult<T>().setCode(RetCode.SUCCESS).setMsg(SUCCESS).setData(data);
   }

   public static <T> RetResult<T> makeErrRsp(String message) {
      return new RetResult<T>().setCode(RetCode.FAIL).setMsg(SUCCESS);
   }

   public static <T> RetResult<T> makeRsp(int code, String msg) {
      return new RetResult<T>().setCode(code).setMsg(msg);
   }
   
   public static <T> RetResult<T> makeRsp(int code, String msg, T data) {
      return new RetResult<T>().setCode(code).setMsg(msg).setData(data);
   }
}

　　

五：功能測試

@RequestMapping("/selectById")
public RetResult<UserInfo> selectById(Integer id){
    UserInfo userInfo = userInfoService.selectById(id);
    return RetResponse.makeOKRsp(userInfo);
}

　　改造后請求返回數據格式

{
    "code": 200,
    "msg": "success",
    "data": {
        "id": 1,
        "userName": "1"
    }
}