JSON与JAVA的数据转换

 

• 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:

   

  jakarta commons-lang 2.5

  jakarta commons-beanutils 1.8.0

  jakarta commons-collections 3.2.1

  jakarta commons-logging 1.1.1

  ezmorph 1.0.6

  转换

  1、List

  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

  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" ); 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

  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]; }} 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

  ist 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}] 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
  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" ) ); 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" ) ); 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" ),new Integer( bean.getCol()) ); assertEquals( jsonObject.get( "row" ), new Integer( bean.getRow() ) ); assertEquals( jsonObject.get( "value" ), bean.getValue() ); 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" ),new Integer( bean.getCol()) ); assertEquals( jsonObject.get( "row" ), new Integer( bean.getRow() ) ); assertEquals( jsonObject.get( "value" ), bean.getValue() );  

        6、JSON TO XML

      

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