一.org.json 解析器 (推薦使用,更適合于對象模型)
概述及例子: http://code.google.com/p/json-simple/
API: http://code.google.com/p/json-simple/
例(測試通過,注意延遲加載問題):
  JSONArray  jsona=new JSONArray();
  JSONObject jsono=new JSONObject();
  List<Author> l=authorDAO.findAll();
  for(Author a:l){
   jsono.put("author_num", a.getAuthorNam());
   jsono.put("author_nam", a.getAuthorNum());
   jsono.put("author_sex", a.getAuthorSex());
   jsono.put("author_level", a.getLevel().getLevelNam());
   jsono.put("author_department", a.getAuthorDepartment());
   jsona.add(jsono.clone());              //jsono.clone()返回實例對象;jsono僅僅只是個指針
   jsono.clear();                                //必須清除內(nèi)容以備下次調(diào)用.
  }

二.json-lib 解析器
(1)所需依賴的類文件

Json-lib requires (at least) the following dependencies in your classpath:

• jakarta commons-lang 2.3               //appach網(wǎng)站下載最新的
• jakarta commons-beanutils 1.7.0     //appach網(wǎng)站下載最新的
• jakarta commons-collections 3.2     //appach網(wǎng)站下載最新的
• jakarta commons-logging 1.1          //appach網(wǎng)站下載最新的
• ezmorph 1.0.4

詳見: http://json-lib.sourceforge.net/

(2)下載JSON-LIB-2.2.1,并查找 ezmorph 1.0.4 文件

 1import net.sf.json.JSONArray;
 2
 3
 4
 5boolean[] boolArray = new boolean[]{true,false,true};      
 6           JSONArray jsonArray1 = JSONArray.fromObject( boolArray );      
 7           System.out.println( jsonArray1 );      
 8           // prints [true,false,true]     
 9              
10           List list = new ArrayList();      
11           list.add( "first" );      
12           list.add( "second" );      
13           JSONArray jsonArray2 = JSONArray.fromObject( list );      
14           System.out.println( jsonArray2 );      
15           // prints ["first","second"]     
16  
17           JSONArray jsonArray3 = JSONArray.fromObject( "['json','is','easy']" );      
18           System.out.println( jsonArray3 );      
19           // prints ["json","is","easy"]