Java uses Jsonobject instance _java

First, the introduction of JAR package
Use Jsonobject must refer to Json-lib.jar, and it also relies on other packages
Common-lang.jar
Common-beanuitls.jar
Common-collections.jar
Common-logging.jar
Ezmorph.jar
Second, the use of Jsonobject objects
The Json-lib package is a Java object, XML, and JSON-converted package.
1. Convert Java objects to JSON strings

Copy Code code as follows:

Person P1=new person ();
P1.setname ("Liu Dajiang");
P1.setage (26);
String Jsonstr=jsonobject.fromobject (p1). toString ();

2. Convert a Java collection into a JSON string

Copy Code code as follows:

Person P1=new person ();p 1.setName ("A1");p 1.setAge (26);
Person P2=new person ();p 2.setName ("A2");p 2.setAge (23);

List personlist=new arraylist<person> ();
Personlist.add (p1);
Personlist.add (p2);

Map personmap=new hashmap<string, person> ();
Personmap.put ("P1", p1);
Personmap.put ("P2", p2);

[{' Age ': ', ' name ': ' A1 '},{' age ': #, ' name ': ' A2 '}]
Jsonarray.fromobject (personlist). toString ();
Jsonserializer.tojson (Personlist)

[{' P2 ': {' name ': ' A2 ', ' Age ':}, ' P1 ': {' name ': ' A1 ', ' Age ': 26}}]
Jsonarray.fromobject (Personmap). toString ();
Jsonserializer.tojson (Personmap)

3. Convert a JSON string into a dynamic Java object

Copy Code code as follows:

String jsonstr= "[{\ name\": \ "a2\", \ "age\": 23},{\ "name\": \ "a1\", \ "age\": 26}] ";
Jsonarray Ja=jsonarray.fromobject (JSONSTR);

for (int i=0;i<ja.size (); i++) {
Jsonobject jo= Ja.getjsonobject (i); Convert to Jsonobject Object
System.out.println (Jo.get ("name"));

Person p= (person) Jsonobject.tobean (jo,person.class); Convert into JavaBean
System.out.println (P.getname ());

}