JAVA使用Gson解析json数据实例解析
JSON(JavaScriptObjectNotation)是一种轻量级的数据交换格式，易于阅读和编写，同时也易于机器解析和生成。同XML一样是一种“传输格式”。JSON采用与编程语言无关的文本格式，便于数据传输、存储、交换。
封装类Attribute：
publicclassAttribute{
privateintid;
privateStringname;
privateintage;
publicintgetId(){
returnid;
}
publicvoidsetId(intid){
this.id=id;
}
publicStringgetName(){
returnname;
}
publicvoidsetName(Stringname){
this.name=name;
}
publicintgetAge(){
returnage;
}
publicvoidsetAge(intage){
this.age=age;
}
}
另一个封装类GsonDataAnalysis：
publicclassGsonDataAnalysis{
privateList<Attribute>list;
publicList<Attribute>getList(){
returnlist;
}
publicvoidsetList(List<Attribute>list){
this.list=list;
}
}
测试类Main方法：
/**
*Gson解析json数据
*@authorForeverLover
*@version2015-04-19
*/
publicclassGsonTest{
publicstaticvoidmain(String[]args){
StringsTotalString="{\"list\":["+
"{\"id\":\"1\",\"name\":\"Tom\",\"age\":\"12\"},"+
"{\"id\":\"2\",\"name\":\"Marry\",\"age\":\"18\"}"+
"]}";
Gsongson=newGson();
GsonDataAnalysisgda=gson.fromJson(
sTotalString,GsonDataAnalysis.class);
for(inti=0;i<gda.getList().size();i++){
System.out.print("ID号："+gda.getList().get(i).getId()+"");
System.out.print("姓名："+gda.getList().get(i).getName()+"");
System.out.println("年龄："+gda.getList().get(i).getAge());
}
}
}
注：在使用Gson类的时候在工程中要添加Gson.jar包。
下面给大家介绍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"}]};
Gsongson=newGson();
SurveyListVOsurveyListVO=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"}]};
JSONObjectjson;
try{
json=newJSONObject(sTotalString);
JSONArrayresults=json.getJSONArray("result");
for(inti=0;i<results.length();i++){
SurveyVOsurveyVO=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(JSONExceptione){
e.printStackTrace();
}
}