java 解析json格式数据

       有时候可能会用到json格式进行数据的传输，那么怎么把接收到的数据解析出来呢？ 下面介绍两种解析json数据的方法：

       1、通过谷歌的Gson来进行解析： 
json数据：sTotalString = {"message":"success","result":[{"surveyid":"1","surveyname":"B"}{surveyid":"2","surveyname":"C"}]}; 

两个VO类： 

1. public class SurveyVO {
   
2. 
   
3.     private String surveyId;
   
4.     private String surveyName;
   
5.     private String message;
   
6. 
   
7.     public String getMessage() {
   
8.         return message;
   
9.     }
   
10. 
    
11.     public void setMessage(String message) {
    
12.         this.message = message;
    
13.     }
    
14. 
    
15.     public String getSurveyId() {
    
16.         return surveyId;
    
17.     }
    
18. 
    
19.     public void setSurveyId(String surveyId) {
    
20.         this.surveyId = surveyId;
    
21.     }
    
22. 
    
23.     public String getSurveyName() {
    
24.         return surveyName;
    
25.     }
    
26. 
    
27.     public void setSurveyName(String surveyName) {
    
28.         this.surveyName = surveyName;
    
29.     }
    
30. 
    
31. }
    
32. 
    
33. public class SurveyListVO {
    
34.     
    
35.     private String message;
    
36.     private List<SurveyVO> result;
    
37.     public String getMessage() {
    
38.         return message;
    
39.     }
    
40.     public void setMessage(String message) {
    
41.         this.message = message;
    
42.     }
    
43.     public List<SurveyVO> getResult() {
    
44.         return result;
    
45.     }
    
46.     public void setResult(List<SurveyVO> result) {
    
47.         this.result = result;
    
48.     }    
    
49. }

json格式转换成object类型：

1. public class fromGson() {
   
2.         sTotalString = {"message":"success","result":[{"surveyid":"1","surveyname":"B"}{"surveyid":"2","surveyname":"C"}]};
   
3. 
   
4.         Gson gson = new Gson();
   
5.         SurveyListVO surveyListVO = gson.fromJson(sTotalString,
   
6.                                     SurveyListVO.class);
   
7.         for (int i = 0; i < surveyListVO.getResult().size(); i++) {
   
8.             System.out.print(surveyListVO.getResult().get(i)
   
9.                              .getSurveyId());
   
10.             print: 1////2
    
11.             System.out.print(surveyListVO.getResult().get(i)
    
12.                              .getSurveyName());
    
13.             print: B///C
    
14.             System.out.print(surveyListVO.getMessage());
    
15.         }
    
16.     }

      2、通过json-org.jar包进行解析： 
json数据：sTotalString = {"message":"success","result":[{"surveyid":"1","surveyname":"B"}{surveyid":"2","surveyname":"C"}]}; 

一个VO类： 

1. public class SurveyVO {
   
2.     private String surveyId;
   
3.     private String surveyName;
   
4.     public String getSurveyId() {
   
5.         return surveyId;
   
6.     }
   
7.     public void setSurveyId(String surveyId) {
   
8.         this.surveyId = surveyId;
   
9.     }
   
10.     public String getSurveyName() {
    
11.         return surveyName;
    
12.     }
    
13.     public void setSurveyName(String surveyName) {
    
14.         this.surveyName = surveyName;
    
15.     }
    
16. }

json格式转换成object类型： 

1. public class fromJson() {
   
2.         sTotalString = {"message":"success","result":[{"surveyid":"1","surveyname":"B"}{"surveyid":"2","surveyname":"C"}]};
   
3.         JSONObject json;
   
4. 
   
5.         try {
   
6.             json = new JSONObject(sTotalString);
   
7.             JSONArray results = json.getJSONArray("result");
   
8.             for (int i = 0; i < results.length(); i++) {
   
9.                 SurveyVO surveyVO = new SurveyVO();
   
10.                 JSONObject result = results.getJSONObject(i);
    
11.                 System.out.println(result.getString("surveyId")+" "+result.getString("surveyName"));
    
12.                 surveyVO.setSurveyId(result.getString("surveyId"));
    
13.                 surveyVO.setSurveyName(result.getString("surveyName"));
    
14.                 surveyVOList.add(surveyVO);
    
15.             }
    
16.         } catch (JSONException e) {
    
17.             e.printStackTrace();
    
18.         }
    
19.     }