Flex File Download +tomcat Web application Server

Note the point:

The 1.filereference.download () method prompts the user to provide a location to save the file and start downloading from the remote URL. Direct load Request path download, no background support required.

2. For the Chinese name of the file, the two sides need to set the code:

First Flex side:

var download_request:urlrequest=new urlrequest (encodeURI (Stringutil.trim (URL)));

• encodeURI (uri:string= "undefined"): String

Encodes a string as a valid URI (Uniform Resource Identifier). Converts the complete URI to a string in which all characters are encoded in the UTF-8 escape sequence, except for characters that belong to a small set of basic characters.

　　

Then the Tomcat side:

Open the \apache-tomcat-7.0.39\conf\server.xml configuration file and locate the following configuration:

    <connector port= "8080" protocol= "http/1.1"               connectiontimeout= "20000"               uriencoding= "UTF-8"/ >

Modify or append the red portion of the content

Then restart the service.

Specific flex download-side code is as follows:

Filedownload.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=" > <fx:script><! [Cdata[import mx.controls.alert;import mx.utils.stringutil;protected function Button1_clickhandler (event: MouseEvent): void{//TODO auto-generated method Stubdownload ("http://192.168.191.5:8080/netcanvas_s/", " 360 Software Small Helper 20140508200748.png ");} private var fileref:filereference=new filereference ();/** * File Download * Backurl: Background server address * pathfilename: Downloaded file path + filename * */publi C function DownLoad (backurl:string,pathfilename:string): Void{fileref.addeventlistener (Event.complete, Completehandler); Fileref.addeventlistener (Securityerrorevent.security_error,securityerrorhandler); Fileref.addeventlistener (progressevent.progress, Progresshandler); Fileref.addeventlistener (IOErrorEvent.IO_ Error,ioshow) var Filenamearr:array=stringutil.trim (pathfilename). Split ('/'); var dECODENAME=FILENAMEARR[FILENAMEARR.LENGTH-1]; Intercept file name var url:string=backurl+pathfilename;var download_request:urlrequest=new urlrequest (EncodeURI (                                        Stringutil.trim (URL))); Fileref.download (Download_request,decodename); Download the file and add the default file name}//download into processing time private function Progresshandler (event:progressevent): Void{lbprogress.text = "downloaded" + (  event.bytesloaded/1024). toFixed (2) + "K, total" + (event.bytestotal/1024). toFixed (2) + "K"; var proc:uint = event.bytesloaded /event.bytestotal * 100;progress1.setprogress (proc, +);p rogress1.label= "Current progress:" + "" + proc + "%";} File Download Success Event private Function Completehandler (event:event): void {mx.controls.Alert.show ("File download succeeded");}   I/O error handling Private function Ioshow (evt:ioerrorevent) {alert.show (evt.tostring (), "IO error"); }//Security sandbox issue event Private function Securityerrorhandler (event:securityerrorevent) {alert.show (event.text);}]] ></fx:Script><fx:Declarations><!--Place non-visual elements (such as services, value objects) here--&GT;&LT;/fx:declarations><s:button x= "289" y= "149" label= "Download" click= "Button1_clickhandler (Event)"/&GT;&LT;MX: ProgressBar x= "y=" "width=" 457 "minimum=" 0 "mode=" manual "maximum=" + "id=" Progress1 "label=" Current progress: 0% "stylename= "MyFont" fontweight= "normal"/><mx:label x= "146" y= "98" width= "321" id= "lbprogress" stylename= "MyFont" textAlign = "Right"/></s:application>

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