Flex4/Flash多文件上传(带进度条)实例分享
要求
FLASH文件上传和传统的HTML文件上传，能实现多文件上传、大文件上传，和上传前预览。
当然HTML5也能实现上述功能，这里就不多说了，有时间我在做一个实例和大家分享一下。
下面介绍一下百度图片基于FLASH文件上传工具截图:
MultiFile Upload上传插件介绍:
下面是对MultiFile Upload 插件的UI自定义和代码的翻译:
界面:
自定义UI组件: FlashFileUpload.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" minWidth="955" minHeight="600" backgroundColor="#333333" horizontalCenter="0" verticalCenter="0" creationComplete="initApp()"> <fx:Declarations> </fx:Declarations> <fx:Script> <![CDATA[ import com.newmediateam.fileIO.MultiFileUpload; import flash.media.Sound; import flash.media.SoundChannel; import flash.net.FileFilter; import flash.net.URLVariables; import mx.controls.Alert; import mx.core.SoundAsset; public var multiFileUpload:MultiFileUpload; // 传送完成音乐 [Embed(source="assets/audio/Ding.mp3")] public var soundClass:Class; public var snd:SoundAsset = new soundClass() as SoundAsset; public var sndChannel:SoundChannel; // 设置文件过滤器 public var imageTypes:FileFilter = new FileFilter("Images (*.jpg; *.jpeg; *.gif; *.png)" ,"*.jpg; *.jpeg; *.gif; *.png"); public var videoTypes:FileFilter = new FileFilter("Flash Video Files (*.flv)","*.flv"); public var documentTypes:FileFilter = new FileFilter("Documents (*.pdf), (*.doc), (*.rtf), (*.txt)",("*.pdf; *.doc; *.rtf, *.txt")); // 将文件过滤器装载如数组 递给MultiFileUpload public var filesToFilter:Array = new Array(imageTypes,videoTypes,documentTypes); public var uploadDestination:String = "http://www.li-cheng.cn"; // 修改服务端上传控制器 public function initApp():void{ var postVariables:URLVariables = new URLVariables; postVariables.projectID = 55; postVariables.test ="Hello World"; multiFileUpload = new MultiFileUpload( filesDG, browseBTN, clearButton, delButton, upload_btn, progressbar, uploadDestination, postVariables, 11534336, filesToFilter ); multiFileUpload.addEventListener(Event.COMPLETE,uploadsfinished); //事件有分配 } public function uploadsfinished(event:Event):void{ sndChannel=snd.play(); //播放音频文件 } ]]> </fx:Script> <s:Group horizontalCenter="0" top="100" width="708" height="408" > <s:BitmapImage source="@Embed('/assets/images/RasterizedItems.png')" /> <!--背景图片--> <s:SkinnableContainer horizontalCenter="0" verticalCenter="0" width="638" height="308" skinClass="skins.SkinnableContainer"> <s:layout> <s:VerticalLayout paddingLeft="15" paddingRight="23" paddingTop="15" paddingBottom="23" /> </s:layout> <!--数据列表--> <s:DataGrid id="filesDG" requestedRowCount="4" rowHeight="40" width="100%" height="200" skinClass="skins.DG" > <!-- <s:columns> <s:ArrayList> <s:GridColumn dataField="a" headerText="#" headerRenderer="components.GridHeaderRenderer" itemRenderer="components.GridItemRenderer"></s:GridColumn> <s:GridColumn dataField="b" headerText="歌曲" headerRenderer="components.GridHeaderRenderer" itemRenderer="components.GridItemRenderer"></s:GridColumn> </s:ArrayList> </s:columns>--> </s:DataGrid> <s:HGroup width="65%"> <!--进度条--> <mx:ProgressBar id="progressbar" width="100%" labelPlacement="right" barSkin="skins.ProgressBar.CustomProgressSkin" trackSkin="skins.ProgressBar.CustomProgressBarTrackSkin" color="0xFFFFFF" minimum="0" visible="true" maximum="100" label="CurrentProgress 0%" direction="right" mode="manual" /> </s:HGroup> <!--按钮们--> <s:HGroup gap="10" paddingTop="10"> <s:Button id="browseBTN" skinClass="skins.buttonSkin4" label="浏览" fontFamily="微软雅黑"/> <s:Button id="upload_btn" skinClass="skins.buttonSkin5" label="上传" fontFamily="微软雅黑"/> <s:Button id="delButton" skinClass="skins.buttonSkin6" label="移除" fontFamily="微软雅黑"/> <s:Button id="clearButton" skinClass="skins.buttonSkin6" label="移除全部" fontFamily="微软雅黑"/> </s:HGroup> </s:SkinnableContainer> </s:Group> </s:Application>
主程序代码: MultiFileUpload.as
// 例子: // multiFileUpload = new MultiFileUpload( // filesDG, DataGrid组件 // browseBTN, 浏览按钮 // clearButton, 清楚全部 // delButton, 清楚选中 // upload_btn, 上传按钮 // progressbar, 进度条 // "http://[Your Server Here]/MultiFileUpload/upload.cfm", 上传地址 控制器 // postVariables, 上传参数 // 350000, 最大文件大小 0 （零）值=没有文件限制 // filesToFilter 文件过滤数组 // ); package com.newmediateam.fileIO { //倒入包 import components.GridHeaderRenderer; import components.GridItemRenderer; import flash.events.*; import flash.net.FileFilter; import flash.net.FileReference; import flash.net.FileReferenceList; import flash.net.URLRequest; import flash.net.URLVariables; import mx.collections.ArrayCollection; import mx.collections.ArrayList; import mx.controls.Alert; import mx.controls.ProgressBar; import mx.controls.ProgressBarMode; import mx.core.ClassFactory; import mx.events.CollectionEvent; import spark.components.Button; import spark.components.DataGrid; import spark.components.gridClasses.GridColumn; public class MultiFileUpload { //UI 变量 private var _datagrid:DataGrid; private var _browsebutton:Button; private var _remselbutton:Button; private var _remallbutton:Button; private var _uploadbutton:Button; private var _progressbar:ProgressBar; private var _testButton:Button; //DataGrid 列 private var _nameColumn:GridColumn; private var _typeColumn:GridColumn; private var _sizeColumn:GridColumn; private var _creationDate:GridColumn; private var _modificationDate:GridColumn; private var _progressColumn:GridColumn; private var _columns:ArrayList; // 文件参考变量 [Bindable] private var _files:ArrayCollection; private var _fileref:FileReferenceList //FileReferenceList 类提供了让用户选择一个或多个要上载的文件的方法。 private var _file:FileReference; //FileReference 类提供了在用户计算机和服务器之间上载和下载文件的方法 private var _uploadURL:URLRequest; private var _totalbytes:Number; // 文件过滤数组 private var _filefilter:Array; //配置变量 private var _url:String; // 文件上传URL private var _maxFileSize:Number; //允许上次的最大文件大小 单位字节 private var _variables:URLVariables; // 上传变量 类似 ?a=hello&b=world //构造器 public function MultiFileUpload( dataGrid:DataGrid, browseButton:Button, removeAllButton:Button, removeSelectedButton:Button, uploadButton:Button, progressBar:ProgressBar, url:String, variables:URLVariables, maxFileSize:Number, filter:Array ){ _datagrid = dataGrid; _browsebutton = browseButton; _remallbutton = removeAllButton; _remselbutton = removeSelectedButton; _uploadbutton = uploadButton; _url = url; _progressbar = progressBar; _variables = variables; _maxFileSize = maxFileSize; _filefilter = filter; init(); //调用初始化话函数 } //初始化函数 private function init():void{ // 设置文件 ArrayCollection 和 文件处理变量 _files = new ArrayCollection(); _fileref = new FileReferenceList; _file = new FileReference; // 设置总字节数 _totalbytes = 0; // 给UI组件监听事件 _browsebutton.addEventListener(MouseEvent.CLICK, browseFiles); _uploadbutton.addEventListener(MouseEvent.CLICK,uploadFiles); _remallbutton.addEventListener(MouseEvent.CLICK,clearFileCue); _remselbutton.addEventListener(MouseEvent.CLICK,removeSelectedFileFromCue); _fileref.addEventListener(Event.SELECT, selectHandler); _files.addEventListener(CollectionEvent.COLLECTION_CHANGE,popDataGrid); //集合数据变化是监听此函数 // 设置进度条参数 _progressbar.mode = "manual"; // 指定用于更新进度栏的方法。 _progressbar.label = ""; //设置按钮组件 _uploadbutton.enabled = false; _remselbutton.enabled = false; _remallbutton.enabled = false; // 设置 DataGrid 控件 _nameColumn = new GridColumn; _typeColumn = new GridColumn; _sizeColumn = new GridColumn; _nameColumn.dataField = "name"; _nameColumn.headerText= "文件"; _nameColumn.headerRenderer=new ClassFactory(GridHeaderRenderer); _typeColumn.dataField = "type"; _typeColumn.headerText = "类型"; _typeColumn.width = 80; _typeColumn.headerRenderer=new ClassFactory(GridHeaderRenderer); _sizeColumn.dataField = "size"; _sizeColumn.headerText = "文件大小"; _sizeColumn.labelFunction = bytesToKilobytes as Function; //Label处理函数 _sizeColumn.width = 150; _sizeColumn.headerRenderer=new ClassFactory(GridHeaderRenderer); _columns = new ArrayList([_nameColumn,_typeColumn,_sizeColumn]); _datagrid.columns=_columns; _datagrid.sortableColumns = false; //排序 _datagrid.dataProvider = _files; //数据绑定 // 设置URL请求对象和地址 _uploadURL = new URLRequest; _uploadURL.url = _url; _uploadURL.method = "POST"; //设置请求方式 可以为POST和GET .. _uploadURL.data = _variables; //变量 _uploadURL.contentType = "multipart/form-data"; //请求类型声明 如果要上传二进制数据这个必须 } /******************************************************** * 私有方法 * ********************************************************/ // 流量文件 多文件流量 private function browseFiles(event:Event):void{ _fileref.browse(_filefilter); } // 上传文件 private function uploadFiles(event:Event):void{ if (_files.length > 0){ _file = FileReference(_files.getItemAt(0)); _file.addEventListener(Event.OPEN, openHandler); //前置操作 _file.addEventListener(ProgressEvent.PROGRESS, progressHandler); _file.addEventListener(Event.COMPLETE, completeHandler); _file.addEventListener(SecurityErrorEvent.SECURITY_ERROR,securityErrorHandler);//当对 FileReference.upload() 或 FileReference.download() 方法的调用尝试将文件上载到调用方安全沙箱外部的服务器，或是从调用方安全沙箱外部的服务器上下载文件时进行调度。 _file.addEventListener(HTTPStatusEvent.HTTP_STATUS,httpStatusHandler);//当上载失败并且存在可用来描述失败的 HTTP 状态代码时调度。 _file.addEventListener(IOErrorEvent.IO_ERROR,ioErrorHandler);//当上载或下载失败时调度。 _file.upload(_uploadURL); setupCancelButton(true); } } // 删除选定的文件 private function removeSelectedFileFromCue(event:Event):void{ if (_datagrid.selectedIndex >= 0){ _files.removeItemAt( _datagrid.selectedIndex); } } // 删除全部文件 private function clearFileCue(event:Event):void{ _nameColumn.itemRenderer=null; _typeColumn.itemRenderer=null; _sizeColumn.itemRenderer=null; _files.removeAll(); } // 取消当前文件上传 private function cancelFileIO(event:Event):void{ _file.cancel(); setupCancelButton(false); checkCue(); } //文件类型列 label处理函数 private function bytesToKilobytes(data:Object,blank:Object):String { var kilobytes:String; kilobytes = String(Math.round(data.size/ 1024)) + ' kb'; return kilobytes } // 设置进度条Labe值 private function getByteCount():void{ var i:int; _totalbytes = 0; for(i=0;i < _files.length;i++){ _totalbytes += _files[i].size; } _progressbar.label = "文件: "+ _files.length+ "大小: " + Math.round(_totalbytes/1024) + " kb" } //检查文件不超过maxFileSize为|如果_maxFileSize == 0没有文件限制设置 private function checkFileSize(filesize:Number):Boolean{ var r:Boolean = false; //if filesize greater then _maxFileSize if (filesize > _maxFileSize){ r = false; trace("false"); }else if (filesize <= _maxFileSize){ r = true; trace("true"); } if (_maxFileSize == 0){ r = true; } return r; } // 重新设置进度条 private function resetProgressBar():void{ _progressbar.label = ""; _progressbar.maximum = 0; _progressbar.minimum = 0; } // reset form item elements 重置所有的元素 private function resetForm():void{ _uploadbutton.enabled = false; _uploadbutton.addEventListener(MouseEvent.CLICK,uploadFiles); _uploadbutton.label = "上传"; _progressbar.maximum = 0; _totalbytes = 0; _progressbar.label = ""; _remselbutton.enabled = false; _remallbutton.enabled = false; _browsebutton.enabled = true; } //每当_FILES的ArrayCollection改变这个函数被调用，以确保数据网格的数据的一致 private function popDataGrid(event:CollectionEvent):void{ getByteCount(); checkCue(); } // enable or disable upload and remove controls based on files in the cue; //启用上传和清楚按钮 private function checkCue():void{ if (_files.length > 0){ _uploadbutton.enabled = true; _remselbutton.enabled = true; _remallbutton.enabled = true; }else{ resetProgressBar(); _uploadbutton.enabled = false; } } // toggle upload button label and function to trigger file uploading or upload cancelling // 上传按钮和取消按钮的切换 和功能的切换 private function setupCancelButton(x:Boolean):void{ if (x == true){ _uploadbutton.label = "取消"; _browsebutton.enabled = false; _remselbutton.enabled = false; _remallbutton.enabled = false; _uploadbutton.addEventListener(MouseEvent.CLICK,cancelFileIO); }else if (x == false){ _uploadbutton.removeEventListener(MouseEvent.CLICK,cancelFileIO); resetForm(); } } /********************************************************* * File IO Event Handlers * *********************************************************/ // called after user selected files form the browse dialouge box. // 文件被选中后执行的响应函数 private function selectHandler(event:Event):void { var i:int; var msg:String =""; var dl:Array = []; for (i=0;i < event.currentTarget.fileList.length; i ++){ if (checkFileSize(event.currentTarget.fileList[i].size)){ _files.addItem(event.currentTarget.fileList[i]); trace("under size " + event.currentTarget.fileList[i].size); } else { dl.push(event.currentTarget.fileList[i]); trace(event.currentTarget.fileList[i].name + " too large"); } _nameColumn.itemRenderer=new ClassFactory(GridItemRenderer); _typeColumn.itemRenderer=new ClassFactory(GridItemRenderer); _sizeColumn.itemRenderer=new ClassFactory(GridItemRenderer); _sizeColumn.labelFunction = bytesToKilobytes as Function; //Label处理函数 } if (dl.length > 0){ for (i=0;i<dl.length;i++){ msg += String(dl[i].name + " 文件过大. \n"); } mx.controls.Alert.show(msg + "文件最大为: " + Math.round(_maxFileSize / 1024) + " kb","文件过大",4,null).clipContent; } } // 文件被打开 上传之前的响应函数 private function openHandler(event:Event):void{ trace('openHandler triggered'); _files; } //文件上传被上传的每个文件的过程中调用|我们用这个来养活进度条的数据 private function progressHandler(event:ProgressEvent):void { _progressbar.setProgress(event.bytesLoaded,event.bytesTotal); //设置进度条的状态 _progressbar.label = "Uploading " + Math.round(event.bytesLoaded / 1024) + " kb of " + Math.round(event.bytesTotal / 1024) + " kb " + (_files.length - 1) + "剩余"; } //所谓的后一个文件已被successully上传|我们利用这一点来检查是否有任何文件留下来上传和如何处理它 //上传完成 private function completeHandler(event:Event):void{ _files.removeItemAt(0); //移除集合中的第0号元素 if (_files.length > 0){ _totalbytes = 0; uploadFiles(null); }else{ setupCancelButton(false); _progressbar.label = "上传完成"; var uploadCompleted:Event = new Event(Event.COMPLETE); //完成时创建一个事件 dispatchEvent(uploadCompleted); //把事件分配出去 } } private function ioErrorHandler(event:IOErrorEvent):void{ //trace('And IO Error has occured:' + event); mx.controls.Alert.show(String(event),"ioError",0); } private function securityErrorHandler(event:SecurityErrorEvent):void{ mx.controls.Alert.show(String(event),"Security Error",0); } private function cancelHandler(event:Event):void{ trace('cancelled'); } private function httpStatusHandler(event:HTTPStatusEvent):void { if (event.status != 200){ mx.controls.Alert.show(String(event),"Error",0); } } } }
演示地址：http://www.li-cheng.cn/demo/FlashFileUpload/FlashFileUpload.html
资料下载:http://pan.baidu.com/share/link?shareid=1217875474&uk=1545675865
作者:
Li-Cheng
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