flex上传和下载文件

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" width="400" height="300" initialize="init()">
	<mx:Script>
		<![CDATA[
			import mx.controls.Alert;
			import flash.net.FileReference;
			public var myFileReference:FileReference = new FileReference();
			
			private function init():void {
				process.label = "0 byte";
				showDetail.text = "无文件上传";
			}
			
			private function browse():void {
				//浏览本地文件
				myFileReference.browse();
				//为打开选择框定义处理
				myFileReference.addEventListener(Event.SELECT,selectHandler);
				//在上传过程中触发的事件处理
				myFileReference.addEventListener(ProgressEvent.PROGRESS,onProcess);
				myFileReference.addEventListener(Event.COMPLETE,onComplete);
			}
			
			private function selectHandler(event:Event):void {
				sName.text = myFileReference.name;
			}
			
			private function upload():void {
				//调用upload.jsp接受从flsh player发送的文件
				var request:URLRequest = new URLRequest("http://localhost:8080/UpAndDownloadFile/upload.jsp");
				try{
					//上传文件
					myFileReference.upload(request);
					showDetail.text = "upload";
				}catch(error:Error) {
					mx.controls.Alert.show("上传文件出错");
				}
			}
			
			private function onProcess(event:ProgressEvent):void {
				var proc:uint = event.bytesLoaded;
				var total:uint = event.bytesTotal;
				process.setProgress(proc,total);
				showDetail.text = "上传中";
				process.label = proc.toString()+"bytes";
			}
			
			private function onComplete(event:Event):void {
				showDetail.text = "上传结束";
				sName.text = "";
				this.parentDocument.download.init();
			}
			
			//取消事件
			private function cancel():void {
				myFileReference.cancel();
			}
			
		]]>
	</mx:Script>
	<mx:Button x="330" y="41" label="浏览" click="browse()"/>
	<mx:TextInput id="sName" x="26" y="39" width="272"/>
	<mx:Button x="26" y="81" label="上传" click="upload()"/>
	<mx:Button x="110.5" y="81" label="取消" click="cancel()"/>
	<mx:ProgressBar id="process" x="26" y="172" width="360" mode="manual" labelPlacement="right"/>
	<mx:Label x="26" y="125" text="当前状态"/>
	<mx:TextInput id="showDetail" x="110" y="125" width="188"/>
</mx:Canvas>

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" initialize="init()" width="414" height="316">
<mx:Script>
	<![CDATA[
		import mx.collections.XMLListCollection;
		import mx.rpc.events.ResultEvent;
		import mx.controls.Alert;
		
		public var filePath:String;
		public var myFilereference:FileReference = new FileReference();
		public function init():void {
			getList.send();
			process1.label = "0 bytes";
		}
		
		//下载文件
		private function down():void {
			var u:String = "http://localhost:8080/UpAndDownloadFile/down.jsp?file="+filePath;
			var request:URLRequest = new URLRequest(u);
			myFilereference.download(request);
			myFilereference.addEventListener(ProgressEvent.PROGRESS,onProcess);
			myFilereference.addEventListener(Event.COMPLETE,onComplete);
		}
		
		private function onProcess(event:ProgressEvent):void {
			var proc:uint = event.bytesLoaded;
			var total:uint = event.bytesTotal;
			process1.setProgress(proc,total);
			process1.label = proc.toString()+" bytes";		
		}
		
		private function resultHandler(event:ResultEvent):void {
			var x:XML = new XML(event.result);
			fileList.dataProvider = x.item;
			getList.request.someValue = Math.random();
		}
		
		private function listChange():void {
			var fName:String = fileList.selectedItem.toString();
			fN.text = fName;
			filePath = "/apace/"+fName;
		}
		
		private function onComplete(event:Event):void {
			mx.controls.Alert("下载完成");
		}
	]]>
</mx:Script>
	<mx:HTTPService id="getList" url="http://localhost:8080/UpAndDownloadFile/List.jsp" result="resultHandler(event)"
		 resultFormat="xml" method="POST">
		<mx:request xmlns="">
			<someValue>
				{Math.random()}
			</someValue>
		</mx:request>
	</mx:HTTPService>
	<mx:List id="fileList" x="10" y="34" height="232" width="184"
		 change="listChange()">
	</mx:List>
	<mx:Label x="10" y="8" text="可下载文件"/>
	<mx:Label x="217" y="34" text="从列表中选择要下载的文件"/>
	<mx:Label id="fN" x="217" y="60" text="文件名"/>
	<mx:LinkButton x="362" y="176" label="下载" click="down()"/>
	<mx:ProgressBar id="process1" x="202" y="238" mode="manual"/>
</mx:Canvas>

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" xmlns:local="*"
	 fontSize="14">
	<mx:TabNavigator id="ud" x="155" y="102" width="445" height="400">
		<!--上传模块-->
		<local:uploadFile id="up" label="上传文件"/>
		<local:downloadFile id="download" label="下载文件"/>
	</mx:TabNavigator>
</mx:Application>