flex的HTTPService远程获取数据并保存为本地文件实例类

package{
	import flash.filesystem.File;
	import flash.filesystem.FileStream;
	import flash.filesystem.FileMode;
	
	import mx.rpc.events.FaultEvent;
	import mx.rpc.events.ResultEvent;
	import mx.rpc.http.HTTPService;
	
	public class DownMarkerXML{
		private var httpService:HTTPService;
		private var SAVEFILEURL:String = "E:\\dataTest\\hello.xml";
		
	    public function DownMarkerXML(){
			httpService = new HTTPService();
		}
		
		public function sendReq(strURL:String):void{
			httpService.url = strURL;
			httpService.useProxy = false;
			httpService.showBusyCursor = false;
			httpService.resultFormat = "e4x";
			httpService.method = "GET";
			httpService.addEventListener(ResultEvent.RESULT, loadAddr);    //请求成功，返回了想要的数据
			httpService.addEventListener(FaultEvent.FAULT, myFaultErrorEvent);    //请求失败，抛出异常
			httpService.send();
		}
		
		private function loadAddr(event:ResultEvent):void{
			if(httpService.lastResult != null){
				var markerXML:XML = XML(httpService.lastResult);
				writeData(markerXML);
			}
		}
		
		private function writeData(saveData:XML):void{
		    var fileStream:FileStream = new FileStream();
		    fileStream.open(new File(SAVEFILEURL), FileMode.WRITE);
		    fileStream.writeUTFBytes(saveData);
		    fileStream.close();
		}
		
		private function myFaultErrorEvent(myFaultEvent:FaultEvent):void{    //异常处理函数
			trace(myFaultEvent.message);
		}
		
		
		
	}
}