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：

publicclassSurveyVO{

privateStringsurveyId;
privateStringsurveyName;
privateStringmessage;

publicStringgetMessage(){
returnmessage;
}

publicvoidsetMessage(Stringmessage){
this.message=message;
}

publicStringgetSurveyId(){
returnsurveyId;
}

publicvoidsetSurveyId(StringsurveyId){
this.surveyId=surveyId;
}

publicStringgetSurveyName(){
returnsurveyName;
}

publicvoidsetSurveyName(StringsurveyName){
this.surveyName=surveyName;
}

}

publicclassSurveyListVO{

privateStringmessage;
privateList<SurveyVO>result;
publicStringgetMessage(){
returnmessage;
}
publicvoidsetMessage(Stringmessage){
this.message=message;
}
publicList<SurveyVO>getResult(){
returnresult;
}
publicvoidsetResult(List<SurveyVO>result){
this.result=result;
}
}

json格式转换成object类型：

publicclassfromGson(){
sTotalString={"message":"success","result":[{"surveyid":"1","surveyname":"B"}{"surveyid":"2","surveyname":"C"}]};

Gson gson=newGson();
SurveyListVO surveyListVO=gson.fromJson(sTotalString,
SurveyListVO.class);
for(inti=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());
}
}

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：

publicclassSurveyVO{
privateStringsurveyId;
privateStringsurveyName;
publicStringgetSurveyId(){
returnsurveyId;
}
publicvoidsetSurveyId(StringsurveyId){
this.surveyId=surveyId;
}
publicStringgetSurveyName(){
returnsurveyName;
}
publicvoidsetSurveyName(StringsurveyName){
this.surveyName=surveyName;
}
}

json格式转换成object类型：

publicclassfromJson(){
sTotalString={"message":"success","result":[{"surveyid":"1","surveyname":"B"}{"surveyid":"2","surveyname":"C"}]};
JSONObject json;

try{
json=newJSONObject(sTotalString);
JSONArray results=json.getJSONArray("result");
for(inti=0;i<results.length();i++){
SurveyVO surveyVO=newSurveyVO();
JSONObjectresult=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();
}
}