Java uses Json-lib objects, String,json

The package used:

Commons-beanutils.jar

Commons-collections-3.1.jar

Commons-lang.jar

Commons-logging-1.1.3.jar

Ezmorph-1.0.jar

Json-lib-2.2.2-jdk15.jar

Let's look at the interaction between JSON and string.

User.java User Object

 Package test;  Public class User {        String id;    String name;     int Age ;                   // Omit Get Set }    

Json.java

 Packagetest;ImportNet.sf.json.JSONObject; Public classjson{ Public Static voidMain (string[] args) {//String to JSONString Text = "{' id ': ' 001 ', ' name ': ' Jack ', ' age ': 22}"; Jsonobject Jo=jsonobject.fromobject (text); System.out.println (Jo.get ("id") + "__" + jo.get ("name") + "___" + jo.getint ("age")));
                //a String-to-object equals the first turn to JSON and then to the objectString text2= "{' id ': ' 002 ', ' name ': ' Lion ', ' age ': 23}"; User U1= (user) Jsonobject.tobean (jsonobject.fromobject (text2), user.class); System.out.println (U1.getid ()+ "___" +u1.getname () + "__" +u1.getage ());
                //Object Goto JSONUser U =NewUser (); U.setid ("003"); U.setage (25); U.setname ("Tom"); Jsonobject Jo2=jsonobject.fromobject (U);        System.out.println (JO2); System.out.println (Jo2.get ("Name")); }}

Print output

001__jack___22
002___lion__23
{"Age": +, "id": "003", "name": "Tom"}
Tom

Add a new property to User.java book

 Package test;  Public class User {        String id;    String name;     int Age ;    Book book;         // Get       }

Book.java

 Package test;  Public class Book {    String id;    String name;     // Get  }

So what does it look like to turn the user into JSON?

 Packagetest;ImportNet.sf.json.JSONObject; Public classJson { Public Static voidMain (string[] args) { book Book=NewBook (); Book. SetId ("111"); Book.setname (Language); User u=NewUser (); U.setid ("002"); U.setname ("Xim");          U.setbook (book); Jsonobject Jo=jsonobject.fromobject (U);            System.out.println (Jo); }}

Output printing

{"Age": 0, "book": {"id": "111", "name": "Language"}, "id": "002", "name": "Xim"}

The method of mutual transfer is the same as the first one.

　　

Java uses Json-lib objects, String,json