Java 利用枚举封装接口返回 JSON 结构

利用枚举封装返回码和返回信息

 1 package com.template.project.util;
 2 
 3 public enum StatusCode {
 4 
 5     SUCCESS(20000, "成功"), FAIL(50000, "失败"),
 6 
 7     REQUEST_PARAM_ERROR(50001, "请求参数错误");
 8 
 9     private int code;
10 
11     private String message;
12 
13     StatusCode(int code, String message) {
14         this.code = code;
15         this.message = message;
16     }
17 
18     public int getCode() {
19         return code;
20     }
21 
22     public void setCode(int code) {
23         this.code = code;
24     }
25 
26     public String getMessage() {
27         return message;
28     }
29 
30     public void setMessage(String message) {
31         this.message = message;
32     }
33 
34 }

封装返回类型，可按需要增加相应的构造方法

  1 package com.template.project.util;
  2 
  3 import java.time.LocalDateTime;
  4 import java.time.format.DateTimeFormatter;
  5 
  6 import com.alibaba.fastjson.JSONObject;
  7 
  8 public class ResultBuilder<T> {
  9 
 10     public ResultBuilder(T data, int code, String message) {
 11         this.result = data;
 12         this.code = code;
 13         this.message = message;
 14         this.responseTime = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
 15     }
 16 
 17     public ResultBuilder(T data, StatusCode statusCode) {
 18         this.result = data;
 19         this.code = statusCode.getCode();
 20         this.message = statusCode.getMessage();
 21         this.responseTime = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
 22     }
 23 
 24     public ResultBuilder(T data, StatusCode statusCode, String extendMsg) {
 25         this.result = data;
 26         this.code = statusCode.getCode();
 27         this.message = statusCode.getMessage() + extendMsg;
 28         this.responseTime = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
 29     }
 30 
 31     public ResultBuilder(StatusCode statusCode) {
 32         this.code = statusCode.getCode();
 33         this.message = statusCode.getMessage();
 34         this.responseTime = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
 35     }
 36 
 37     public ResultBuilder(StatusCode statusCode, String extendMsg) {
 38         this.code = statusCode.getCode();
 39         this.message = statusCode.getMessage() + extendMsg;
 40         this.responseTime = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
 41     }
 42 
 43     public ResultBuilder(int code, String message) {
 44         this.code = code;
 45         this.message = message;
 46         this.responseTime = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
 47     }
 48 
 49     public ResultBuilder(int code) {
 50         this.code = code;
 51         this.responseTime = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
 52     }
 53 
 54     private int code;
 55 
 56     private String message;
 57 
 58     private T result;
 59 
 60     private String responseTime;
 61 
 62     public int getCode() {
 63         return code;
 64     }
 65 
 66     public void setCode(int code) {
 67         this.code = code;
 68     }
 69 
 70     public String getMessage() {
 71         return message;
 72     }
 73 
 74     public void setMessage(String message) {
 75         this.message = message;
 76     }
 77 
 78     public T getResult() {
 79         return this.result;
 80     }
 81 
 82     public void setResult(T result) {
 83         this.result = result;
 84     }
 85 
 86     public String getResponseTime() {
 87         return responseTime;
 88     }
 89 
 90     public void setResponseTime(String responseTime) {
 91         this.responseTime = responseTime;
 92     }
 93 
 94     public JSONObject toJSONObject() {
 95         JSONObject out = new JSONObject();
 96         out.put("code", code);
 97         out.put("message", message);
 98         out.put("result", result);
 99         out.put("responseTime", responseTime);
100         return out;
101     }
102 
103     @Override
104     public String toString() {
105         return toJSONObject().toString();
106     }
107     
108 }

接下来看看测试结果

 1 public class Test {
 2     
 3     public static void main(String[] args) {
 4         JSONObject jobj = new JSONObject();
 5         jobj.put("name", "wangbo");
 6         jobj.put("age", 29);
 7         ResultBuilder<JSONObject> resultBuilder = new ResultBuilder<>(jobj, StatusCode.SUCCESS);
 8         System.out.println(resultBuilder);
 9     }
10 
11 }

执行结果为

{"result":{"name":"wangbo","age":29},"code":20000,"responseTime":"2018-09-04 11:00:09","message":"成功"}

统一响应格式有助于系统间调用和前端解析。

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原文地址：https://www.cnblogs.com/wbxk/p/9583276.html