在flex下解析json

最近在做个flex项目.管理软件之类的.那自然要用到些数据格式来传送数据.. ? 在网上找了很多关于java flex json之间数据转换传送的.. 都不怎么满意 .感觉,太复杂了..在网络资料的基础上改了改.. 这里.我分享下我自己刚刚折腾出来的方法 .?

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
			   xmlns:s="library://ns.adobe.com/flex/spark" 
			   xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" 
			   creationComplete="onJSONLoad()" >
	<fx:Script >
		<![CDATA[
			import mx.collections.ArrayCollection;
//见<s:Application   creationComplete="onJSONLoad()">
			protected function onJSONLoad():void
			{
				var testJson:String = "[{"firstName":"Brett","lastName":"McLaughlin"}," +
					"{"firstName":"Tom","lastName":"Kim"}]"   ;
				
			//旧flex需要引用外部的lib. flex4之后,就直接用JSON.parse
			//arr	= (com.adobe.serialization.json.JSON.decode(testJson) as Array);  
				var arr:Array	= (JSON.parse(testJson) as Array);
			// trace(testJson);  //[{"firstName":"Brett","lastName":"McLaughlin"},{"firstName":"Tom","lastName":"Kim"}]
				
				var dp:ArrayCollection = new ArrayCollection(arr);
				grid.dataProvider = dp;
			}
		]]>
	</fx:Script>

	<mx:DataGrid id="grid" right="10" left="10" top="10" bottom="10" >
		<mx:columns>
			<mx:DataGridColumn headerText="名" dataField="firstName"/>
			<mx:DataGridColumn headerText="姓" dataField="lastName"/>
		</mx:columns>
	</mx:DataGrid>
	
	
</s:Application>