http://blog.csdn.net/superit401/article/details/51728929

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 =newboolean[]{true,false,true};

            JSONArray jsonArray1 = JSONArray.fromObject( boolArray );

            System.out.println( jsonArray1 );

           // prints [true,false,true]    

            List list =newArrayList();

            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 =newHashMap();

          map.put("name","json");

          map.put("bool", Boolean.TRUE );      

          map.put("int",newInteger(1) );

          map.put("arr",newString[]{"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[] ptions = 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(newJsonBean() );

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 =newArrayList();

          JsonBean2 jb1 =newJsonBean2();

          jb1.setCol(1);

          jb1.setRow(1);

          jb1.setValue("xx");   

          JsonBean2 jb2 =newJsonBean2();

          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

Java代码

String json ="{name=\"json\",bool:true,int:1,double:2.2,func:function(a){ return a; },array:[1,2]}";

JSONObject jsonObject = JSONObject.fromString(json);

Object bean = JSONObject.toBean( jsonObject );

assertEquals( jsonObject.get("name"), PropertyUtils.getProperty( bean,"name") );

   assertEquals( jsonObject.get("bool"), PropertyUtils.getProperty( bean,"bool") );

   assertEquals( jsonObject.get("int"), PropertyUtils.getProperty( bean,"int") );

    assertEquals( jsonObject.get("double"), PropertyUtils.getProperty( bean,"double") );

    assertEquals( jsonObject.get("func"), PropertyUtils.getProperty( bean,"func") );

   List expected = JSONArray.toList( jsonObject.getJSONArray("array") );

   assertEquals( expected, (List) PropertyUtils.getProperty( bean,"array") );    

Java代码

String json ="{\"value\":\"xx\",\"row\":1,\"col\":1}";

JSONObject jsonObject = JSONObject.fromString(json);

   JsonBean2 bean = (JsonBean2) JSONObject.toBean( jsonObject, JsonBean2.class);

    assertEquals( jsonObject.get("col"),newInteger( bean.getCol())   );

      assertEquals( jsonObject.get("row"),newInteger( bean.getRow() ) );

      assertEquals( jsonObject.get("value"), bean.getValue() );    

6 json to xml

1)

JSONObject json = new JSONObject( true );

String xml = XMLSerializer.write( json );

<o class="object" null="true">

2)

JSONObject json = JSONObject.fromObject("{\"name\":\"json\",\"bool\":true,\"int\":1}");

String xml = XMLSerializer.write( json );

<o class="object">

<name type="string">json</name>

<bool type="boolean">true</bool>

<int type="number">1</int>

</o>

<o class="object">

<name type="string">json</name>

<bool type="boolean">true</bool>

<int type="number">1</int>

</o>

3)

JSONArray json = JSONArray.fromObject("[1,2,3]");

String xml = XMLSerializer.write( json );

<a class="array">

<e type="number">1</e>

<e type="number">2</e>

<e type="number">3</e>

</a>

7 、xml to json

<a class="array">

<e type="function" params="i,j">

return matrix[i][j];

</e>

</a>

<a class="array">

<e type="function" params="i,j">

return matrix[i][j];

</e>

</a>

JSONArray json = (JSONArray) XMLSerializer.read( xml );

System.out.println( json );

// prints [function(i,j){ return matrix[i][j]; }]