JSON(JavaScript Object Notation) 是一種輕量級的數據交換格式，易于閱讀和編寫，同時也易于機器解析和生成。同XML一樣是一種“傳輸格式”。JSON采用與編程語言無關的文本格式，便于數據傳輸、存儲、交換。
封裝類Attribute：
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public class Attribute {private int id;private String name;private int age;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}} |
另一個封裝類GsonDataAnalysis：
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public class GsonDataAnalysis {private List<Attribute> list;public List<Attribute> getList() {return list;}public void setList(List<Attribute> list) {this.list = list;}} |
測試類Main方法：
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/*** Gson解析json數據* @author ForeverLover* @version 2015-04-19*/public class GsonTest {public static void main(String[] args) {String sTotalString = "{\"list\": [" +"{\"id\":\"1\",\"name\":\"Tom\",\"age\":\"12\"}," +"{\"id\":\"2\",\"name\":\"Marry\",\"age\":\"18\"}" +"]}";Gson gson = new Gson();GsonDataAnalysis gda = gson.fromJson(sTotalString, GsonDataAnalysis.class);for(int i = 0; i < gda.getList().size(); i ++) {System.out.print("ID號：" + gda.getList().get(i).getId() + " ");System.out.print("姓 名：" + gda.getList().get(i).getName() + " ");System.out.println("年 齡：" + gda.getList().get(i).getAge());}}} |
注：在使用Gson類的時候在工程中要添加Gson.jar包。
下面給大家介紹java 解析json格式數據
有時候可能會用到json格式進行數據的傳輸，那么怎么把接收到的數據解析出來呢？ 下面介紹兩種解析json數據的方法：
1、通過谷歌的Gson來進行解析：
json數據：sTotalString = {"message":"success","result":[{"surveyid":"1","surveyname":"B"}{surveyid":"2","surveyname":"C"}]};
兩個VO類：
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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格式轉換成object類型：
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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////2System.out.print(surveyListVO.getResult().get(i).getSurveyName());print: B///CSystem.out.print(surveyListVO.getMessage());}} |
2、通過json-org.jar包進行解析：
json數據：sTotalString = {"message":"success","result":[{"surveyid":"1","surveyname":"B"}{surveyid":"2","surveyname":"C"}]};
一個VO類：
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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格式轉換成object類型：
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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();}} |
