JSON-lib这个Java类包用于把bean，map和XML转换成JSON并能够把JSON转回成bean和DynaBean.

　　下载地址：

　　还要需要的第3方包：mons（3.2以上版本）

　　org.apache.oro

　　net.sf.ezmorph（ezmorph-1.0.4.jar）

　　nu.xom

　　1、List

　　Java代码

boolean[] boolArray = new boolean[]{true,false,true};      

            JSONArray jsonArray1 = JSONArray.fromObject( boolArray );      
            System.out.println( jsonArray1 );      
           // prints [true,false,true]     
              
            List list = new ArrayList();      
            list.add( "first" );      
            list.add( "second" );      
            JSONArray jsonArray2 = JSONArray.fromObject( list );      
            System.out.println( jsonArray2 );      
           // prints ["first","second"]     
  
            JSONArray jsonArray3 = JSONArray.fromObject( "['json','is','easy']" );      
            System.out.println( jsonArray3 );      
           // prints ["json","is","easy"] 

　　2、Map

　　Java代码

Map map = new HashMap();      

          map.put( "name", "json" );      
          map.put( "bool", Boolean.TRUE );      
            
          map.put( "int", new Integer(1) );      
          map.put( "arr", new String[]{"a","b"} );      
          map.put( "func", "function(i){ return this.arr[i]; }" );      
          JSONObject json = JSONObject.fromObject( map );      
          System.out.println( json );      
         //{"func":function(i){ return this.arr[i]; },"arr":["a","b"],"int":1,"name":"json","bool":true}

　　3、BEAN

　　Java代码

/**

      * Bean.java
         private String name = "json";   
         private int pojoId = 1;   
         private char[] options = new char[]{'a','f'};   
         private String func1 = "function(i){ return this.options[i]; }";   
         private JSONFunction func2 = new JSONFunction(new String[]{"i"},"return this.options[i];");
     */   
JSONObject jsonObject = JSONObject.fromObject( new JsonBean() );      
System.out.println( jsonObject );      
//{"func1":function(i){ return this.options[i]; },"pojoId":1,"name":"json","options":["a","f"],"func2":function(i){ return this.options[i]; }}

　　4、BEANS

　　Java代码

/**

       * private int row ;
           private int col ;
           private String value ;
       *
       */  
List list = new ArrayList();   
          JsonBean2 jb1 = new JsonBean2();   
          jb1.setCol(1);   
          jb1.setRow(1);   
          jb1.setValue("xx");   
            
          JsonBean2 jb2 = new JsonBean2();   
          jb2.setCol(2);   
          jb2.setRow(2);   
          jb2.setValue("");   
            
            
          list.add(jb1);   
          list.add(jb2);   
            
          JSONArray ja = JSONArray.fromObject(list);   
          System.out.println( ja.toString() );   
         //[{"value":"xx","row":1,"col":1},{"value":"","row":2,"col":2}]

　　5、String to bean