java 解析json格式数据

  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：

public class SurveyVO {

	private String surveyId;
	private String surveyName;
	private String message;

	public String getMessage() {
		return message;
	}

	public void setMessage(String message) {
		this.message = message;
	}

	public String getSurveyId() {
		return surveyId;
	}

	public void setSurveyId(String surveyId) {
		this.surveyId = surveyId;
	}

	public String getSurveyName() {
		return surveyName;
	}

	public void setSurveyName(String surveyName) {
		this.surveyName = surveyName;
	}

}

public class SurveyListVO {
	
	private String message;
	private List<SurveyVO> result;
	public String getMessage() {
		return message;
	}
	public void setMessage(String message) {
		this.message = message;
	}
	public List<SurveyVO> getResult() {
		return result;
	}
	public void setResult(List<SurveyVO> result) {
		this.result = result;
	}
	
	
}

json格式转换成object类型：

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

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：

public class SurveyVO {
	private String surveyId;
	private String surveyName;
	public String getSurveyId() {
		return surveyId;
	}
	public void setSurveyId(String surveyId) {
		this.surveyId = surveyId;
	}
	public String getSurveyName() {
		return surveyName;
	}
	public void setSurveyName(String surveyName) {
		this.surveyName = surveyName;
	}
}

json格式转换成object类型：

public class fromJson() {
			sTotalString = {"message":"success","result":[{"surveyid":"1","surveyname":"B"}{surveyid":"2","surveyname":"C"}]};
			JSONObject json;
			 try {
			 json = new JSONObject(sTotalString);
			 JSONArray results = json.getJSONArray("result");
			 for (int i = 0; i < results.length(); i++) {
			 SurveyVO surveyVO = new SurveyVO();
			 JSONObject result = results.getJSONObject(i);
			 System.out.println(result.getString("surveyId")+"  "+result.getString("surveyName"));
			 surveyVO.setSurveyId(result.getString("surveyId"));
			 surveyVO.setSurveyName(result.getString("surveyName"));
			 surveyVOList.add(surveyVO);
			 }
			 } catch (JSONException e) {
			 e.printStackTrace();
			 }
		}