flex actionScript读取文件示例代码

 import flash.events.event;
 import flash.net.urlloader;
 import flash.net.urlrequest;
 import flash.net.urlvariables;
 
 public class txtloader
 {
 private var settxt:function = null;
 public function txtloader()
 {
 }
 
 public function loadtxt(filename:string, settxt:function):void {
  this.settxt = settxt;
  var urlrequest:urlrequest = new urlrequest(filename);
  var urlloader:urlloader = new urlloader();
  urlloader.addeventlistener(event.complete, complete);
  urlloader.load(urlrequest);
 }
 
 private function complete(event:event):void {
  var urlloader:urlloader = event.currenttarget as urlloader;
  settxt.call(null, urlloader.data);
 }
 }

-----------------调用的方法-------------------------------------------------------------   

new txtloader().loadtxt('readme.txt', function(txt:string):void { 

         alert.show( txt); 

    });