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

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. 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());
9. print: 1////2
10. System.out.print(surveyListVO.getResult().get(i)
11. .getSurveyName());
12. print: B///C
13. System.out.print(surveyListVO.getMessage());
14. }
15. }

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. 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. }