Flex 利用 Blazeds上传文件 (转)
用Flex做业务经常会碰到各种类型的文件上传,如FTP上传、Http上传或者WEB服务形式上传,本文说的利用Blazeds上传文件有点类似Http上传,其原理就是客户端发送byte流,然后服务器端flex.messaging.MessageBrokerServlet接收byte流并生成文件。阅读本文最好了解Flex RemoteObject的使用,了解Blazeds的service调用。
1、新建Blazeds的文件上传服务,其实就是一个普通的Java类
Public class FileUpDownloadService{
/**
*
* <p>Description:文件上传</p>
* @param content,文件内容
* @param fileType,文件类型
* @return
* @throws Exception
* @author Marcus
* @date 2010-8-31 下午03:57:10
*/
public void uploadFile(byte[] content, String fileType)throws Exception{
File file = new File(文件名+ fileType);
//write file
FileOutputStream stream = new FileOutputStream(file);
stream.write(content);
stream.close();
}
}
2、配置remoting-config.xml文件
<destination id="fileUpDownloadService" channels="my-amf">
<properties>
<source>FileUpDownloadService</source>
<scope>application</scope>
</properties>
</destination>
3、flex客户端使用FileRefrence、remoteobject组件进行文件上传
1)FileRefrence用于文件选择;
2)remoteobject用户文件上传
<?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" minWidth="800" minHeight="600" creationComplete="init()" width="370" height="180">
<fx:Script>
<![CDATA[
import mx.controls.Alert;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
private var file:FileReference = new FileReference();
protected function ro_resultHandler(event:ResultEvent):void
{
Alert.show("文件上传成功!");
}
protected function init():void{
//选择文件后,加载文件
file.addEventListener(Event.SELECT, selectHandler);
}
private function selectHandler(event:Event):void {
file.load(); //加载文件
}
protected function ro_faultHandler(event:FaultEvent):void
{
Alert.show("文件上传失败,"+event.fault.faultString);
}
protected function btnBrows_clickHandler(event:MouseEvent):void
{
file.browse();
}
protected function btnUpload_clickHandler(event:MouseEvent):void
{
ro.uploadFile(file.data, file.type);
}
]]>
</fx:Script>
<fx:Declarations>
<s:RemoteObject id="ro" destination="fileUpDownloadService"
result="ro_resultHandler(event)" fault="ro_faultHandler(event)"/>
</fx:Declarations>
<s:Button id="btnBrows" click="btnBrows_clickHandler(event)" label="选择文件" x="57" y="60"/>
<s:Button id="btnUpload" click="btnUpload_clickHandler(event)" label="上传" x="145" y="60"/>
</s:Application>