Java Foundation-json

/** * 1. The data and data objects contained in the string are parsed based on the JSON string received */System.out.println ("1. According to the received JSO                n string to parse the data and data objects contained in the string ");  The JSON string received by string result = "[{\" username\ ": \" Your name\ ", \" user_json\ ": {\" username\ ": \" Your name\ ",                \ "nickname\": \ "Your Nickname\"}}] ";                Generates a JSON object based on a string jsonarray json = new Jsonarray (result);                Jsonobject jsonobject = json.optjsonobject (0);                Gets the data item String username = jsonobject.getstring ("username");                Gets the data object Jsonobject user = Jsonobject.getjsonobject ("User_json");                String nickname = user.getstring ("nickname");                SYSTEM.OUT.PRINTLN (username);                System.out.println (nickname);                /** * 2.JSON Object converted to string String */System.out.println ("2.JSON object converted to string string"); Create Jsonobject Object JSONObject jsonobj = new Jsonobject ();                Add Data jsonobj.put ("username", "Wanglihong") to the JSON;                Jsonobj.put ("height", 12.5);                Jsonobj.put ("Age", 24);                Create a Jsonarray array and add the JSON to the array jsonarray = new Jsonarray ();                Array.put (Jsonobj);                Convert to String jsonstr = Array.tostring ();                                System.out.println (JSONSTR); /** * 3. The collection is converted to the Jsonarray object */System.out.println ("3.                Set to Jsonarray object ");                Initializes the ArrayList collection and adds the data list<string> List = new arraylist<string> ();                List.add ("username");                List.add ("Age");                List.add ("Sex");                Initializes the HashMap collection and adds an array of map<string,string> Map = new hashmap<string,string> ();                Map.put ("BookName", "CSS3 Combat"); Map.put ("PRIce "," 69.0 ");                Initializes the Jsonarray object and adds the data jsonarray Jsonarray = new Jsonarray ();                Jsonarray.put (list);                Jsonarray.put (map); System.out.println (Jsonarray.tostring ());

　　

Imported Package Name:
Import Org.json.JSONArray;
Import Org.json.JSONObject;


Dependencies for import:
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20160810</version>
</dependency>


Output Result:
1. Parse the data and data objects contained in the string based on the JSON string received
Your name
Your nickname
2.JSON object converted to string string
[{"Age": "username": "Wanglihong", "Height": 12.5}]
3. Set conversion to Jsonarray object
[["Username", "age", "Sex"],{"price": "69.0", "BookName": "CSS3 Combat"}]

Java Foundation-json