JSON与Java对象之间的转换实战

JSON与JAVA数据的转换
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:http://json-lib.sourceforge.net/ 
还要需要的第3方包: 
org.apache.commons(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"]    

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} 

Map map = new HashMap();   
         map.put( "name", "json" );