Flex Óë servlet ͨÐÅ ¡¾xml¡¿

String userId = request.getParameter("userId");
System.out.println(userId);
response.setCharacterEncoding("UTF-8");
//response.getWriter().println("hello world -- ÎÒ°®Äã¡£¡£¡£");
String xml = "<user>" +
"<username>Ìθç</username>" +
"</user>";
response.getWriter().println(xml);
import flash.trace.Trace;
private var loader:URLLoader = new URLLoader();
private function asCallHandler():void{
// URL
var url:String = "http://localhost/app01/getUser";
// ²ÎÊý
var args:URLVariables = new URLVariables();
args.userId = 1;
// RequestÇëÇó
var request:URLRequest = new URLRequest(url);
request.data = args;// °ó¶¨²ÎÊý
//ÇëÇó¼ÓÔØÆ÷

loader.addEventListener(Event.COMPLETE,handleServerResponse);
loader.load(request);//·¢ËÍÇëÇó
}
private function handleServerResponse(e:Event):void{
trace("User data is loaded");
//½«·µ»ØµÄÊý¾Ý½âÎö³Éxml
var resultXML : XML = new XML(loader.data);
var uname : String = resultXML.username[0];
debugText.text = uname;
}
protected function button1_clickHandler(event:MouseEvent):void
{
// ·¢ËÍÇëÇó
asCallHandler();
}