Map and Jsonobject the 2 data structures between the transformations

The front desk writes JSON directly: var array = [];

Call method: Array[index], if object, then ["Key"]

var obj = {"A": 123, "B": "Hello", "C": Array}

Calling method: Obj.a or obj["a"]

It's just var.

var str = " {" A ": 123," B ":" Hello "," C ": Array}" Str doesn't have that many methods .

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1 Importjava.util.LinkedList;2 ImportJava.util.*;3 ImportJava.util.ListIterator;4 5 ImportNet.sf.json.JSONArray;6 ImportNet.sf.json.JSONObject;7 8 9  Public classa11111111 {Ten      Public Static voidMain (string[] args) { One          AJsonobject json=NewJsonobject (); -Json.put ("name", "Xiaoming"); -Json.put ("Age", "10"); the         //The output JSON is: {"name": "Xiaoming", "Age": "Ten"} -         //JSON is a real data structure that can have these methods Json.isempty () -         //if: The string is not so many ways -  +Jsonarray ja=NewJsonarray (); -Ja.add ("1"); +Ja.add ("2"); AJa.add ("3"); atJa.add (3, JSON); -         //["1", "2", "3", {"name": "Xiaoming", "Age": "Ten"}] - System.out.println (ja.tostring ()); -System.out.println (Ja.get (3));  -         //{"name": "Xiaoming", "Age": "10"} points out is a string, not a data structure -         //System.out.println (Ja.get (3). Get ("age")); The Get method is not available, Ja.get (3). This is a little bit of a way out of everything. inString str = (string) ja.get (3);//Str can receive this string -      to  +         /*Ja.get (3) is essentially a string representation.*/ -         //now Ja is a string, parsed into the structure above theJsonobject jsonobject = Jsonobject.fromobject (Ja.get (3)); *System.out.println (Jsonobject.get ("Age"));//get ten $         Panax Notoginsenghashmap<string, object> data =NewHashmap<string, object>();  -Iterator it =Jsonobject.keys ();  the            //Traverse jsonobject Data, add to map object +             while(It.hasnext ()) A            {   theString key =string.valueof (It.next ());  +String value =(String) jsonobject.get (key);  - data.put (key, value);  $            }   $ System.out.println (data); -                //{name= xiaoming, age=10} -     }   - }Wuyi          the //{name= xiaoming, age=10} map data structure grow like this - //{"name": "Xiaoming", "Age": "Ten"} JSONOBJECT data structure has grown like this

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From Map-json Object-JSON character 1 public class a11111111 {

2       Public Static voidMain (string[] args) {3Map map =NewHashMap ();4Map.put ("msg", "yes");//map contains Yes5Jsonobject Jsonobject =jsonobject.fromobject (map);
and reuse the same piece of code,6SYSTEM.OUT.PRINTLN ("The result of the output is:" +jsonobject);7             //3. Convert the JSON object to a JSON string8String result =jsonobject.tostring ();9 System.out.println (result);Ten         } One      /*The result of the output is: {"msg": "Yes"}*/ A      //{"MSG": "Yes"} long: But the above is the data structure (Jsonobject), the following is the string -      //data Structures in Java can be output directly by name, or data structure names. ToString Output
The top one can call a lot of methods--the next one is just a string, not so many ways.
 -}

Jsonobject Jsonobject = Jsonobject.fromobject

Map and Jsonobject the 2 data structures between the transformations