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. publicclassSurveyVO{
   
2. 
   
3. privateStringsurveyId;
   
4. privateStringsurveyName;
   
5. privateStringmessage;
   
6. 
   
7. publicStringgetMessage(){
   
8. returnmessage;
   
9. }
   
10. 
    
11. publicvoidsetMessage(Stringmessage){
    
12. this.message=message;
    
13. }
    
14. 
    
15. publicStringgetSurveyId(){
    
16. returnsurveyId;
    
17. }
    
18. 
    
19. publicvoidsetSurveyId(StringsurveyId){
    
20. this.surveyId=surveyId;
    
21. }
    
22. 
    
23. publicStringgetSurveyName(){
    
24. returnsurveyName;
    
25. }
    
26. 
    
27. publicvoidsetSurveyName(StringsurveyName){
    
28. this.surveyName=surveyName;
    
29. }
    
30. 
    
31. }
    
32. 
    
33. publicclassSurveyListVO{
    
34. 
    
35. privateStringmessage;
    
36. privateList<SurveyVO>result;
    
37. publicStringgetMessage(){
    
38. returnmessage;
    
39. }
    
40. publicvoidsetMessage(Stringmessage){
    
41. this.message=message;
    
42. }
    
43. publicList<SurveyVO>getResult(){
    
44. returnresult;
    
45. }
    
46. publicvoidsetResult(List<SurveyVO>result){
    
47. this.result=result;
    
48. }
    
49. }

json格式转换成object类型：

1. publicclassfromGson(){
   
2. sTotalString={"message":"success","result":[{"surveyid":"1","surveyname":"B"}{"surveyid":"2","surveyname":"C"}]};
   
3. 
   
4. Gson gson=newGson();
   
5. SurveyListVO surveyListVO=gson.fromJson(sTotalString,
   
6. SurveyListVO.class);
   
7. for(inti=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. publicclassSurveyVO{
   
2. privateStringsurveyId;
   
3. privateStringsurveyName;
   
4. publicStringgetSurveyId(){
   
5. returnsurveyId;
   
6. }
   
7. publicvoidsetSurveyId(StringsurveyId){
   
8. this.surveyId=surveyId;
   
9. }
   
10. publicStringgetSurveyName(){
    
11. returnsurveyName;
    
12. }
    
13. publicvoidsetSurveyName(StringsurveyName){
    
14. this.surveyName=surveyName;
    
15. }
    
16. }

json格式转换成object类型：

1. publicclassfromJson(){
   
2. sTotalString={"message":"success","result":[{"surveyid":"1","surveyname":"B"}{"surveyid":"2","surveyname":"C"}]};
   
3. JSONObject json;
   
4. 
   
5. try{
   
6. json=newJSONObject(sTotalString);
   
7. JSONArray results=json.getJSONArray("result");
   
8. for(inti=0;i<results.length();i++){
   
9. SurveyVO surveyVO=newSurveyVO();
   
10. JSONObjectresult=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. }