java 解析json格式数据（转）

 

2012-07-30 16:43:54|  分类： java |  标签：java  json  |举报|字号 订阅

 

 

有时候我们可能会用到json格式的数据进行数据的传输，那么我们怎么把接收到的数据解析出来呢？ 
  下面有两种方法： 
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： 

Java代码  

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.       
50.       
51. }  

json格式转换成object类型： 

Java代码  

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

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： 

Java代码  

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： 

Java代码  

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