private void parseJSONWithJSONObject(String JsonData) {try{JSONArray jsonArray = new JSONArray(jsonData);for (int i=0; i < jsonArray.length(); i++)    {JSONObject jsonObject = jsonArray.getJSONObject(i);String id = jsonObject.getString("id");String name = jsonObject.getString("name");String version = jsonObect.getString("version");System.out.println("id" + id + ";name" + name + ";version" + version);}}catch (Exception e){e.printStackTrace();}

[{"id": 1580615,"name": "皮的嘛","packageName": "com.renren.mobile.android","iconUrl": "app/com.renren.mobile.android/icon.jpg","stars": 2,"size": 21803987,"downloadUrl": "app/com.renren.mobile.android/com.renren.mobile.android.apk","des": "2011-2017 你的铁头娃一直在这儿。中国最大的实名制SNS网络平台，嫩头青"},{"id": 1540629,"name": "不存在的","packageName": "com.ct.client","iconUrl": "app/com.ct.client/icon.jpg","stars": 2,"size": 4794202,"downloadUrl": "app/com.ct.client/com.ct.client.apk","des": "斗鱼271934走过路过不要错过，这里有最好的鸡儿"}
]JSONArray jsonArray=new JSONArray(json);for(int i=0;i<jsonArray.length();i++){JSONObject object=jsonArray.getJSONObject(i);String id=object.getString("id");String name=object.getString("name");String packageName=object.getString("packageName");String iconUrl = object.getString("iconUrl");double stars=Double.parseDouble(object.getString("stars"));String size=object.getString("size");String downloadUrl = object.getString("downloadUrl");String des = object.getString("des");//其他操作
               ....}

 {"id": 1525490,"name": "有缘网","packageName": "com.youyuan.yyhl","iconUrl": "app/com.youyuan.yyhl/icon.jpg","stars": 4,"size": 3876203,"downloadUrl": "app/com.youyuan.yyhl/com.youyuan.yyhl.apk","des": "产品介绍：有缘是时下最受大众单身男女亲睐的婚恋交友软件。有缘网专注于通过轻松、"}JSONObject object = new JSONObject(json);long id = object.getLong("id");String name = object.getString("name");String packageName = object.getString("packageName");String iconUrl = object.getString("iconUrl");float stars = Float.parseFloat(object.getString("stars"));long size = object.getLong("size");String downloadUrl = object.getString("downloadUrl");String des = object.getString("des");

private void parseJSONWithGSON(String JsonData) {Gson gson = new Gson();List<Student > applist = gson.fromJson(jsonData,new TypeToken<List<App>>() {}.getType());for(Student student: studentlist) {}
}

public class Student {private String name;private int age;private boolean sex;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;}public boolean isSex() {return sex;}public void setSex(boolean gender) {this.sex = gender;}@Overridepublic String toString() {return "Student [name=" + name + ", age=" + age + ", sex=" + sex + "]";}}

public class DemoFormat {// 将 java 对象 格式化为 Json 字符串.public static void main(String[] args) {Student stu = new Student();stu.setName("张三");stu.setAge(18);stu.setSex(true);Gson gson = new Gson();//toJson方法参数即一个javabean。返回值即一个json字符串String json = gson.toJson(stu);//打印为 {"name":"张三","age":18,"sex":true}
        System.out.println(json);}
}

public class DemoFormat {// 将 Json 字符串. 格式化为 java对象.public static void main(String[] args) {String json = "{'name':'张三','age':18,'sex':true}";Gson gson = new Gson();// 将json 转化成 java 对象  //fromJson方法。参数一是json字符串。参数二是要转换的javabean//该javabean的字段名必须与json的key名字完全对应才能被正确解析。Student stu = gson.fromJson(json, Student.class);}
}

json:[{'name':'二阳','age':18,'sex':true},{'name':'小2阳','age':19,'sex':false},{'name':'小3马','age':20,'sex':true},{'name':'小4梦','age':21,'sex':false},{'name':'小5莲','age':22,'sex':true}]

 Gson gson = new Gson();// 将 json 转化 成 List泛型List<Student> stus = gson.fromJson(json, new TypeToken<List<Student>>() {}.getType());

{"picture": "image/home01.jpg"
,"list": [{"id": 1525490,"name": "aaa"},{"id": 1525490,"name": "bbb"}]
}

public class Infos{String  picture;List<Name>  list;class Name{String id;String name
}
//所有的setter方法此处省略,其实如果合用的是AS开发可以直接使用工具Gsonfomat一键生成javabean很方便
}

  {'flag':true,'data':{'name':'张三','age':18,'sex':true}} 

1. 获得 解析者JsonParser parser = new JsonParser();2. 获得 根节点元素JsonElement element = parser.parse(json);3. 根据 文档判断根节点属于 什么类型的 Gson节点对象// 假如文档 显示 根节点 为对象类型  对象类型即 {}表示。[]表示为数组类型。// 获得 根节点 的实际 节点类型JsonObject root = element.getAsJsonObject();4. 取得 节点 下 的某个节点的 value// 获得 flag 节点的值, flag 节点为基本数据节点JsonPrimitive flagJson = root.getAsJsonPrimitive("flag");// 基本节点取值boolean flag = flagJson.getAsBoolean();// 获得 data 节点的值，data 节点为Object数据节点JsonObject dataJson = root.getAsJsonObject("data");// 将节点上的数据转换为对象Student stu = new Gson().fromJson(dataJson,Student.class);