Java中Json格式数据的转换（bean,May和XML等）

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}
3、BEAN
/*** Bean.javaprivate String name = "json";private int pojoId = 1;private char[] options = 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( 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
/*** private int row ;private int col ;private String value ;**/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 = "{"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
1)
JSONObject json = new JSONObject( true );
String xml = XMLSerializer.write( json );

<o null="true">

2)
JSONObject json = JSONObject.fromObject("{"name":"json","bool":true,"int":1}");
String xml = XMLSerializer.write( json );
<o params="i,j">
return matrix[i][j];
</e>
</a>
<a 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]; }]