【转】flex利用Blazeds上传文件
?Flex 利用 Blazeds上传文件 收藏
?????? 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>
?
本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/chuangxin/archive/2010/09/13/5881758.aspx
