java工具类集合（一）

所介绍的工具包均可直接新建工具类丢在包下面。

1.在使用Controller向Ajax传参时常常使用JSON来完成传参，所以写了一个工具类，将返回的数据封装成JSON格式。

 1 package com.lgqrlchinese.projectName.utils;
 2
 3 public class ResponseResult<T> {
 4
 5     public ResponseResult() {
 6
 7     }
 8
 9     public ResponseResult(T rows) {
10         this.data = rows;
11     }
12
13     public ResponseResult(String errorMessage) {
14         this.success = false;
15         this.message = errorMessage;
16     }
17
18     public ResponseResult(String errorCode, String errorMessage) {
19         this.success = false;
20         this.code = errorCode;
21         this.message = errorMessage;
22     }
23
24     private String code; // 返回的错误状态码
25
26     public void setCode(String code) {
27         this.code = code;
28     }
29
30     public String getCode() {
31         return this.code;
32     }
33
34     private Boolean success = true;
35
36     public Boolean setSuccess(Boolean success) {
37         return this.success = success;
38     }
39
40     public Boolean getSuccess() {
41         return this.success;
42     }
43
44     private T data;
45
46     public T getData() {
47         return data;
48     }
49
50     public void setData(T data) {
51         this.data = data;
52     }
53
54     private String message;
55
56     public String getMessage() {
57         return this.message;
58     }
59
60     public void setMessage(String message) {
61         this.success = false;
62         this.message = message;
63     }
64
65 }

使用Demo：

 1 //这里只贴方法内容
 2  public ResponseResult<List<Bean>> getAllUser(HttpServletResponse response) {
 3         ResponseResult<List<Bean>> result = new ResponseResult<List<Bean>>();
 4         List<Bean> list = new ArrayList<Bean>();
 5         orderInfoManageService.selectAllOrder();
 6         list = orderInfoManageService.selectAllOrder();
 7         //        result.setData();
 8         System.out.println("这是User列表");
 9         result.setData(list);
10         return result;
11     }