Flex上传文件

<?xml version="1.0" encoding="utf-8"?>
<s:HGroup xmlns:fx="<a target=_blank href="http://ns.adobe.com/mxml/2009">http://ns.adobe.com/mxml/2009</a>"
    xmlns:s="library://ns.adobe.com/flex/spark"
    xmlns:mx="library://ns.adobe.com/flex/mx" creationComplete="hgroup1_creationCompleteHandler(event)"
    width="100%" height="30" >
 <fx:Script>
  <![CDATA[
   import mx.collections.ArrayList;
   import mx.controls.Alert;
   import mx.events.FlexEvent;
   private var file:FileReference = new FileReference; 
   public var fileList:ArrayList;
   public var manualCheck:ManualCheck;
   
   protected function hgroup1_creationCompleteHandler(event:FlexEvent):void
   {
    // TODO Auto-generated method stub
//    file.addEventListener(DataEvent.UPLOAD_COMPLETE_DATA,fileUploadCompleteHandler); 
    file.addEventListener(Event.SELECT, fileSelect);  
//    file.addEventListener(IOErrorEvent.IO_ERROR,uploadError);
   }
   
   protected function button2_clickHandler(event:MouseEvent):void
   {
    // 浏览
    file.browse();
   }
   
   private function fileSelect(e:Event):void  
   {   
    if(fileList.getItemIndex(file) == -1){
     fileList.addItem(file);
    }
    fileName.text = file.name;
   }
   
//   private function fileUploadCompleteHandler(e:DataEvent):void{     
//    
//   } 
   
   private function uploadError(e:IOErrorEvent):void{    
    this.cursorManager.removeBusyCursor();
    //获取后台的错误提示信息
    Alert.show("上传出错。","提示");
   }
   
   
   protected function button3_clickHandler(event:MouseEvent):void
   {
    // 删除
    fileList.removeItem(this.file);
    manualCheck.group.removeElement(this);
   }
   
  ]]>
 </fx:Script>
 <fx:Declarations>
  <!-- 将非可视元素（比如服务、值对象）放在此处 -->
  
 </fx:Declarations>
 <s:TextInput id="fileName" width="350"/>
 <mx:Button label="浏览" click="button2_clickHandler(event)" fontWeight="bold"
      overSkin="@Embed(source='/assets/dfpBtn/btnliulan2.png')"
      skin="@Embed(source='/assets/dfpBtn/btnliulan.png')"/>
 <mx:Button click="button3_clickHandler(event)"
      overSkin="@Embed(source='/assets/dfpBtn/deletebtn2.png')"
      skin="@Embed(source='/assets/dfpBtn/deletebtn.png')"/>
</s:HGroup>

var file:FileReference = fileList.getItemAt(i) as FileReference;
var request:URLRequest=new URLRequest("s/upload/uploadFile"); 
request.data=new URLVariables();
request.data.orderRedoRecord=n;

try{   
	file.upload(request,"file"); 
} catch (error:Error){
	isSuccess = false;
	Alert.show("文件上传失败");   
}   

@RequestMapping(value = "/uploadFile")
@ResponseBody()
public String UploadFiles(@RequestParam(value = "file") MultipartFile file) {
	String result = "";
	if (!file.isEmpty()) {
		try {
			String attachName = file.getOriginalFilename();
			logger.info(attachName);

			String filePath = "你的路径";
			//此处省去业务代码
			//FileUtils.saveDataToFile(file.getBytes(), filePath);
			result = "上传成功";
		} catch (Exception e) {
			// TODO Auto-generated catch block
			result = "上传失败";
			e.printStackTrace();
		}
	}
	return result;
}