)flex(air)从目录中遍历所有文件并判断格式实例

<?xml version="1.0" encoding="utf-8"?><mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml" layout="horizontal" fontSize="12"    creationComplete="getStudentInfo()" width="800" height="700">        <mx:Script>    <![CDATA[        import mx.controls.Alert;    import flash.filesystem.File;    import flash.filesystem.FileMode;    import flash.filesystem.FileStream;        private function getStudentInfo():void{    var directory:File = new File("C:\\Documents and Settings\\a\\My Documents\\My Music");                        var list:Array = directory.getDirectoryListing();                        var str:String = "";                        for(var i:Number = 0; i < list.length; i++){                    var pattern:RegExp = new RegExp("\w*([-.]mp3)$");                    str += pattern.test(list[i].nativePath) + "   ===   " + list[i].nativePath +"\n";//                          trace(list[i].nativePath);                        }                        txtTextAreaID.text = str;                }                ]]>    </mx:Script>    <mx:Panel title="从目录中遍历所有文件并判断格式实例" verticalAlign="middle" horizontalAlign ="center" width="95%" height="95%">        <mx:TextArea id="txtTextAreaID"  width="100%" height="100%" borderColor="#FF0000" borderThickness="5"/>    </mx:Panel>    </mx:WindowedApplication>