SWFUpload上传组件的一个完整的例子，后台由Struts2完成

* SWFUpload Core, January 2009, www.swfupload.org, swfupload.googlecode.com * --------- Version 2.2.0.1----------- * - Removed requeueUpload due to bugs/poor testing * = Fixed namespace conflict that broke stopUpload * --------- Version 2.2.0----------- * + Added button_placeholder setting that accepts a DOM element. * + Added ability to requeue any file (including some improvement to internal queue state tracking) * + UploadErrors caused by a missing upload_url now causes the file to be requeued automatically * + Added preserve_relative_urls setting * + SWFUpload now converts relative URLs to absolute URLs to avoid issues with Flash Player interpreting it differently on some clients * + Added assume_success_timeout setting which allows uploadSuccess to be called after a timeout if, for some reason Flash ignores the server's response * An additional parameter has been added to the uploadSuccess event to indicate whether a response was received or success was assumed. * --------- Version 2.2.0 Beta 2 ~ 5----------- * = Fixed a Queue Limit bug * + Improved internal event handling code so uploadSuccess fires even when not content is returned from the server (*woot*, except for Macs) * = Fixed issues in Destroy * = Fixed issues with Queue Plugin * + Added periodic checks of the ExternalInterface * + Improved IE memory leak prevention code * + Added Speed Plugin * = Updated Queue Plugin for better multi-plugin compatibility * --------- Version 2.2.0 Beta 1----------- * + Added Flash Player 10 Support * = Added setting for defining a button image * = Added setting for defining button text * = Added setting for defining button width, height and padding * = Added setting for defining what element the Flash Movie should replace * = Added setting for defining flash wmode * = Added setting for defining the mouse cursor * + Added prevent_swf_caching setting as a work-around for issues in Avant Browser (and other IE based browser) * + Added setting for accepting HTTP Status codes other than 200 as successful * + Added parameter to cancelUpload that allows the uploadError event for cancelled uploads to be supressed * + Added pro-active memory leak fix for IE and fixed problems with the destroy function (credits to steffen for patches and testing) * + Replaced callFlash with CallFunction (using the internal function that Flash uses). Based on code from MooTools. * = Fixed bug in the Queue plugin that breaks startUpload when passing a file id. * + Updated Queue plugin to stop the queue if false is returned from the uploadStart handler. * = Fixed small issues in SWFObject plugin * = Fixed issue with ExternalInterface string escaping * - Dropped Graceful Degradation Plugin * - Dropped v1.0.2 Plugin * - Dropped Flash Player 8 support * --------- Version 2.1.0 ----------- * = Fixed GET values so they are escaped properly * + Added destroy function * = Added exception handling around browse() calls * = Minor code cleanup * + Split Core and Demos * --------- Version 2.1.0 Beta 2----------- * = Fixed bug in XHTML fix where it wasn't split correctly by Flash * = Fixed file params "undefined" in debug output * + Added requeue_on_error settings so HTTP/IO/Security errors requeue the file instead of discarding it. This will affect the queue plugin (if an error is occurring the file will be reuploaded and reuploaded). * = Fixed HTTP/IO error behavior. We'll see how this goes Flash 9 is supposed to call HTTPError followed by an IO error but I suspect they come out of orde sometimes. * = Fixed invalid characters in file param names. Worked around flash bug by escaping the names. Should be transparent to devs. * = Fixed missing upload URL logic so it fires consistently * = Fixed file params not being sent when useQueryString is true * + Added SWFObject plugin and demo. * + Added CookieBug demo to demonstrate what they bug really is all about. * + Added VB.Net version of the Application Demo * --------- Version 2.1.0 Beta 1----------- * + Added allowScriptAccess="always" to the embed/object elements so the SWF can be served from different domains. * = Fixed a type-o in the debug output that prevented the instance id (movieName) from displaying. - Thx Joel * + Rewrote SWFUpload.js for better code reuse based on sample code from batiste.bieler (thanks!!!) * + Added queueComplete event to the Queue Plugin * + Added Simple Upload demo * = JSLinted all the JavaScript code * + Added use_query_string setting (and setUseQueryString function) that forces post_param and file_param values to be sent on the query_string instead of the post (for Flash 9 version) * = Fixed file.type and date properties so a default value is provided (rather than null) when no value is provided by flash. * = Fixed misc bugs in the demos * = Fixed ExternalInterface calls being made available for Flash 9 versions <9.0.28 which aren't supported * + Fixed use of & producing invalid XHTML in the <object> and <embed> tags. * - Removed the use of the embed tag (using the <object> sample from the Flash Satay method) * = Updated plugins to work with code rewrite changes. * = Extracted FileProgress object in to its own file. * + Added addPostParam and removePostParam functions * --------- Version 2.0.2 ----------- * = Fixed a bug where post params could not be added to the current file (because it is removed from the queue when it becomes current) * = Fixed a conversion error when converting kilobytes to bytes in the file size check * = Fixed a problem in the documentation that said the file_size_limit was bytes when it is actually kilobytes * + Added formatting to the documentation, a table of contents, and details for each setting . * + Added units for file_size_limit setting. The setting understands B, KB, MB, GB. Default is KB. * + Added a check for the ExternalInterface functions in flashReady so SWFUpload will not fire the loaded event if those are not available. * --------- Version 2.0.1 ----------- * = Fixed a bug where zero-byte files would stop file the queuing process. * = Finished updating Features Demo * + Added GetFileByIndex(i) that gets a JavaScript File Object. The index never changes. Finished files continue to be available. * The JavaScript GetFile function will accept a file_id or an index. * + Added CheckFileSize constants to replace the magic numbers * + Added some code in an attempt to fix "Script is running slowly" error messages * = Better cleanup of FileReference objects * --------- Version 2.0 ----------- * + Re-created SWFUpload in Actionscript v2 for Flash 8 compatibility. Flash 8 loses POST and Server Data features. The two versions are otherwise fully compatible. * Flash 8 uses URL to pass post_params/file_params. * = Changed uploadStart event so it's part of the setTimeout/eventQueue workaround. This allows Flash functions to be called from uploadStart. * = Renamed uploadComplete to uploadSuccess and fileComplete to uploadComplete. All started uploads call uploadComplete (even if cancelled or stopped). * = Changed startUpload validation failure behavior. Rather than cancelling the upload the file is now requeued. Devs can cancel * or do whatever the need to in uploadError to handle the problem. * = Fixed fileQueueLimit/fileUploadLimit logic so it works correctly. * = Moved the upload request building to a later point so that the post params and file params can be updated in uploadStart. * - Removed the last of the UI stuff (ui_container, degraded_container). * + Started development on Plug-ins. Graceful Degradation, v1.0.2, Cookies, Queue Handling * = Fixed missing file_status field in FileItem. * + Added modificationDate to FileItem (file object) * + Added setStats function that lets you change the file upload count, etc.