//org.json.JSONArray;
//org.json.JSONObject;
private void parseJSONWithJSONObject(String jsonData){
try {
//將json字符串jsonData裝入JSON數(shù)組，即JSONArray
//jsonData可以是從文件中讀取，也可以從服務(wù)器端獲得
JSONArray jsonArray = new JSONArray(jsonData);
for (int i = 0; i< jsonArray.length(); i++) {
//循環(huán)遍歷，依次取出JSONObject對(duì)象
//用getInt和getString方法取出對(duì)應(yīng)鍵值
JSONObject jsonObject = jsonArray.getJSONObject(i);
int stu_no = jsonObject.getInt("stu_no");
String stu_name = jsonObject.getString("stu_name");
String stu_sex = jsonObject.getString("stu_sex");
Log.d("MainActivity","stu_no: " + stu_no);
Log.d("MainActivity","stu_name: " + stu_name);
Log.d("MainActivity","stu_sex: " + stu_sex);
}
} catch (Exception e) {
e.printStackTrace();
}
}

[{ "stu_no":12345,"stu_name":"John","stu_sex":"male"
},{ "stu_no":12346,"stu_name":"Tom","stu_sex":"male"
},{"stu_no":12347,"stu_name":"Lily","stu_sex":"female"}]

public class Student {
private int stu_no;
private String stu_name;
private String stu_sex;
Student(int stu_no,String stu_name,String stu_sex){
this.stu_no = stu_no;
this.stu_name = stu_name;
this.stu_sex = stu_sex;
}
}
// 序列化，將Student對(duì)象stu轉(zhuǎn)換為字符串str
Student stu = new Student(123,"Tom","male");
Gson gson = new Gson();
String str = gson.toJson(stu); 
//反序列化，將字符串轉(zhuǎn)換為Student對(duì)象
jsonData = "{ \"stu_no\":12345,\"stu_name\":\"John\",\"stu_sex\":\"male\" }";
Gson gson = new Gson();
Student student = gson.fromJson(jsonData,Student.class); 

Gson gson = new Gson();
int[] ints = {1, 2, 3, 4, 5};
String[] strings = {"abc", "def", "ghi"};
//序列化（serialization）
//將整數(shù)數(shù)組轉(zhuǎn)換為JSON數(shù)組
gson.toJson(ints); // ==> [1,2,3,4,5]
//將字符串?dāng)?shù)組轉(zhuǎn)換為JSON數(shù)組
gson.toJson(strings); // ==> ["abc", "def", "ghi"]
// 反序列化（Deserialization）
// 將JSON數(shù)組轉(zhuǎn)換為原生類數(shù)組
// ints2、string2與ints、strings相等
int[] ints2 = gson.fromJson("[1,2,3,4,5]", int[].class); 
String[] strings2 = gson.fromJson("[\"abc\", \"def\", \"ghi\"]",String[].class); 

//對(duì)于類似于2.2中的jsonData，包含3個(gè)Student對(duì)象
//與原生類不同，需要借助TypeToken獲得期望解析成的數(shù)據(jù)類型
//下列代碼運(yùn)行后，students包含三個(gè)Student對(duì)象
Gson gson = new Gson();
List<Student> students;
students = gson.fromJson(jsonData, new TypeToken<List<Student>>(){}.getType()); // ==>[stu0,stu1,stu2]