ActionScript3中的JSON数据格式

     JSON是经常会用到的数据格式，在各个语言中都会使用到。起到和xml同样的作用，但是解析效率要比xml要高。下边是在AS3里边的一个小例子：

    <?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="init();">
 <mx:Script>
  <![CDATA[
   import mx.controls.Alert;
   import com.adobe.serialization.json.JSON;
   private function init():void{
    parseJsonToObj();
    parseObjToJson();
   }
   
   private function parseJsonToObj():void{
    var serverJSON:String = '{ "programmers": [{ "firstName": "Brett", "lastName":"McLaughlin", "email": "brett@newInstance.com" },{ "firstName": "Jason", "lastName":"Hunter", "email": "jason@servlets.com" }, { "firstName": "Elliotte", "lastName":"Harold", "email": "elharo@macfaq.com" }],"authors": [{ "firstName": "Isaac", "lastName": "Asimov", "genre": "science fiction" },{ "firstName": "Tad", "lastName": "Williams", "genre": "fantasy" },{ "firstName": "Frank", "lastName": "Peretti", "genre": "christian fiction" }],"musicians": [{ "firstName": "Eric", "lastName": "Clapton", "instrument": "guitar" },{ "firstName": "Sergei", "lastName": "Rachmaninoff", "instrument": "piano" }]}';
    var obj:Object = JSON.decode(serverJSON);
    Alert.show(obj.programmers[0].firstName);       //output:Brett
    Alert.show(obj.authors[1].genre);              //output:fantasy
   }
   
   private function parseObjToJson():void{
    var obj:Object = new Object();
    obj.id = "20080728" ;
    obj.name = "Tony";
    var obj1:Object = new Object();
    obj1.firstName = "xie";
    obj1.lastName = "yanfeng";
    obj.value = obj1;
    var str:String = JSON.encode(obj);    
    Alert.show(str);
    //output:         {"name":"Tony","value":{"lastName":"yanfeng","firstName":"xie"},"id":"20080728"}
   }
  ]]>
 </mx:Script>
</mx:Application>

 

    另外，该程序中需要用到corelib.swc包中的JSON类。corelib.swc是adobe官方的类库，除了json外，还有其他一些比较常用的工具类，比如ArrayUtil、XmlUtil等等。