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

2、Map
Java代码
  1. Map map = new HashMap();
  2. map.put( "name","json" );
  3. map.put( "bool", Boolean.TRUE );
  5. map.put( "int",new Integer(1) );
  6. map.put( "arr",new String[]{"a","b"} );
  7. map.put( "func","function(i){ return this.arr[i]; }" );
  8. JSONObject json = JSONObject.fromObject( map );
  9. System.out.println( json );
  10. //{"func":function(i){ return this.arr[i]; },"arr":["a","b"],"int":1,"name":"json","bool":true}

3、BEAN
Java代码
  1. /**
  2. * Bean.java
  3. private String name = "json";
  4. private int pojoId = 1;
  5. private char[] options = new char[]{'a','f'};
  6. private String func1 = "function(i){ return this.options[i]; }";
  7. private JSONFunction func2 = new JSONFunction(new String[]{"i"},"return this.options[i];");
  8. */
  9. JSONObject jsonObject = JSONObject.fromObject( new JsonBean() );
  10. System.out.println( jsonObject );
  11. //{"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
  1. /**
  2. * private int row ;
  3. private int col ;
  4. private String value ;
  5. *
  6. */
  7. List list = new ArrayList();
  8. JsonBean2 jb1 = new JsonBean2();
  9. jb1.setCol(1);
  10. jb1.setRow(1);
  11. jb1.setValue("xx");
  13. JsonBean2 jb2 = new JsonBean2();
  14. jb2.setCol(2);
  15. jb2.setRow(2);
  16. jb2.setValue("");
  19. list.add(jb1);
  20. list.add(jb2);
  22. JSONArray ja = JSONArray.fromObject(list);
  23. System.out.println( ja.toString() );
  24. //[{"value":"xx","row":1,"col":1},{"value":"","row":2,"col":2}]

5、String to bean
Java代码
  1. String json = "{name=\"json\",bool:true,int:1,double:2.2,func:function(a){ return a; },array:[1,2]}";
  2. JSONObject jsonObject = JSONObject.fromString(json);
  3. Object bean = JSONObject.toBean( jsonObject );
  4. assertEquals( jsonObject.get( "name" ), PropertyUtils.getProperty( bean,"name" ) );
  5. assertEquals( jsonObject.get( "bool" ), PropertyUtils.getProperty( bean,"bool" ) );
  6. assertEquals( jsonObject.get( "int" ), PropertyUtils.getProperty( bean,"int" ) );
  7. assertEquals( jsonObject.get( "double" ), PropertyUtils.getProperty( bean,"double" ) );
  8. assertEquals( jsonObject.get( "func" ), PropertyUtils.getProperty( bean,"func" ) );
  9. List expected = JSONArray.toList( jsonObject.getJSONArray( "array" ) );
  10. assertEquals( expected, (List) PropertyUtils.getProperty( bean, "array" ) );


Java代码
  1. String json = "{\"value\":\"xx\",\"row\":1,\"col\":1}";
  2. JSONObject jsonObject = JSONObject.fromString(json);
  3. JsonBean2 bean = (JsonBean2) JSONObject.toBean( jsonObject, JsonBean2.class );
  4. assertEquals( jsonObject.get( "col" ),new Integer( bean.getCol()) );
  5. assertEquals( jsonObject.get( "row" ),new Integer( bean.getRow() ) );
  6. 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]; }]

出自http://falchion.javaeye.com/




　　转换后的对象Object是一个MorphDynaBean的动态JavaBean，通过PropertyUtils可以获得指定的属性的值。

　　运行后结果如下：

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