（三）SpringBoot定义统一返回result对象

一：定义响应码枚举

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

package com.example.demo.core.ret;   /**  * @Description: 响应码枚举，参考HTTP状态码的语义  * @author  * @date 2018/4/19 09:42  */ public enum RetCode {      // 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;      RetCode(int code) {       this.code = code;    } }

　　

二：创建返回对象实体（泛型）

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

package com.example.demo.core.ret;   import java.io.Serializable;   import com.alibaba.fastjson.JSON;   /**  * @Description: 返回对象实体  * @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;    }   }

　　说明：code为状态码、msg为提示信息、data为返回的数据

 

四：返回结果数据格式封装

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

package com.example.demo.core.ret;   /**  * @Description: 将结果转换为封装后的对象  * @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：功能测试

?

1 2 3 4 5

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

　　改造后请求返回数据格式

?

1 2 3 4 5 6 7 8

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