import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

public class test_main {

static void parseJson() throws JSONException {
String result = "[{\"username\": \"your name\", \"user_json\": {\"username\": \"your name\", \"nickname\": \"your nickname\"}}]";
JSONArray resultArray = new JSONArray(result);
JSONObject resultObj = resultArray.optJSONObject(0);

String username = resultObj.getString("username");

System.out.println(username);

JSONObject user = resultObj.getJSONObject("user_json");
String nickname = user.getString("nickname");
System.out.println(nickname);

}

static void stringToJosn() throws JSONException {
// 创建JSONObject对象
JSONObject json = new JSONObject();

// 向json中添加数据
json.put("username", "wanglihong");
json.put("height", 12.5);
json.put("age", 24);

// 创建JSONArray数组,并将json添加到数组
JSONArray array = new JSONArray();
array.put(json);

// 转换为字符串
String jsonStr = array.toString();

System.out.println(jsonStr);

}

static void setToJosn() throws JSONException {
// 初始化ArrayList集合并添加数据
List<String> list = new ArrayList<String>();
list.add("username");
list.add("age");
list.add("sex");

// 初始化HashMap集合并添加数组
Map map = new HashMap();
map.put("bookname", "CSS3实战");
map.put("price", 69.0);

// 初始化JSONArray对象,并添加数据
JSONArray array = new JSONArray();
array.put(list);
array.put(map);


String jsonStr = array.toString();

System.out.println(jsonStr);
// 生成的JSON字符串为:[["username","age","sex"],{"price":69,"bookname":"CSS3实战"}]

}

public static void main(String[] args) throws JSONException {
// TODO Auto-generated method stub

// parseJson();

// stringToJosn();
setToJosn();
}

}