flex通过HTTPService与java通信的小例子

 适合初学者理解
1，testflex.mxml
<?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"
creationComplete="init()"
minWidth="955" minHeight="600">
<fx:Declarations>
<!-- 将非可视元素（例如服务、值对象）放在此处 -->
</fx:Declarations>
<fx:Script>
<!--[CDATA[
import mx.collections.ArrayCollection;
import mx.controls.Alert;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import mx.rpc.http.HTTPService;

[Bindable]
private var selectResponse:String= null;
[Bindable]
private var arraylist:ArrayCollection = new ArrayCollection([
{name:"CN",data:"中文"},
{name:"US",data:"英文"},
]);
private function init():void{
// fService.addEventListener(ResultEvent.RESULT,successhandler);
// fService.addEventListener(FaultEvent.FAULT,faulthandler);
}
private function dropdownlistChangeHandler(event:Event = null):void{
var httpservice:HTTPService = new HTTPService();
httpservice.resultFormat = "text";
httpservice.url = "http://localhost:8080/testjava/flexServlet";
httpservice.method = "POST";
var param:Object = new Object;
param.selects = select.selectedItem.data;
httpservice.send(param);
httpservice.addEventListener(ResultEvent.RESULT,successhandler);
// fService.sendRequest(select.selectedItem.data);
// Alert.show(select.selectedItem.data);
}
private function successhandler(event:ResultEvent):void{
selectResponse = event.message.body.toString();
languages.text = selectResponse;
// Alert.show(selectResponse);
}
// private function faulthandler(event:FaultEvent):void{
// selectResponse = event.message.toString();
// languages.text = selectResponse;
// }
]]-->
</fx:Script>
<s:DropD