急求，关于flex操作文件的问题

Dec

RIA技术：AIR 2011-12-4 12:56:41

本人新人小菜鸟一只，目前刚开始学flex，上司交给一个关于XML文件处理的任务。要求就是选择一个XML文件，将其node名替换后以原文件名+_change保存在相同的路径下。保存文件的时候，按下输出按钮自动以新文件名保存在相同的路径下，不要求出现保存的对话框。本人目前只完成了node名的替换部分，剩下的做不出了，请各位大哥大姐们帮帮我，最好是把代码写出来让我学习一下，本人刚接触编程就是学flex，感觉好难。本人QQ：78716799.有大侠愿意不吝赐教就加我吧。有机会我请吃大餐。
本人目前完成的代码如下：

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009"
                                       xmlns:s="library://ns.adobe.com/flex/spark"
                                       xmlns:mx="library://ns.adobe.com/flex/mx"
                                       fontSize="15" height="280" width="750">
      <fx:Script>
            <![CDATA[
                     import flash.events.Event;
                     import flash.events.FileListEvent;
                     import flash.events.IOErrorEvent;
                     import flash.filesystem.File;
                     import flash.filesystem.FileMode;
                     import flash.filesystem.FileStream;
                     import flash.net.URLLoader;
                     import flash.net.URLRequest;
                     import flashx.textLayout.tlf_internal;
                     import mx.collections.ArrayCollection;
                     import mx.controls.Alert;
                     import mx.rpc.events.ResultEvent;
                     private function XmlFileSel(titleStr:String):void{
                              var fileToOpen:File = File.documentsDirectory;
                              selectTextFile(fileToOpen);
                              function selectTextFile(root:File):void{
                                    var xmlFilter:FileFilter = new FileFilter("*.xml","*.xml");
                                    root.browseForOpen("", [xmlFilter]);
                                    root.addEventListener(Event.SELECT, fileSelected);
                              }
                     }
                     private function fileSelected(e:Event):void {
                              URLID.text = File(e.target).nativePath;
                              var myXML:XML = new XML();
                              var XML_URL:String = (URLID.text.toString());
                              var myXMLURL:URLRequest = new URLRequest(XML_URL);
                              var myLoader:URLLoader = new URLLoader(myXMLURL);
                              myLoader.addEventListener("complete", xmlLoaded);
                              var filename:String=(name.toString());
                              trace(filename);
                              function xmlLoaded(event:Event):void
                              {
                                    myXML = XML(myLoader.data);
                                    var str1:String =(myXML.toString());
                                    var myXML1:RegExp=/MessageList/g;
                                    var str2:String=str1.replace(myXML1, "List");
                                    var myXML2:RegExp=/Ms**/g;
                                    var str3:String=str2.replace(myXML2,"Code");
                                    var myXML3:RegExp=/MsgKbn/g;
                                    var str4:String=str3.replace(myXML3,"Type");
                                    var myXML4:RegExp=/Message/g;
                                    var str5:String=str4.replace(myXML4,"Msg");
                                    var myXML5:RegExp=/Detail/g;
                                    var str6:String=str5.replace(myXML5,"Dtl");
                                    var myXML6:RegExp=/DetailOpend/g;
                                    var str7:String=str6.replace(myXML6,"DtlOpend");
                                    var myXML7:RegExp=/BtnPtn/g;
                                    var newXML:String=str7.replace(myXML7,"Btn");
                                    trace(newXML);
                              }
                     }
                     private function XmlFlieSave(titleStr:String):void{
                              var file:File = new File();
                              file.browseForSave(titleStr); //browse
                              file.addEventListener(Event.SELECT, selSave);
                     }
                     private function selSave(e:Event):void{
                              var newFile:File = e.target as File;
                              var str:String = "";
                              if(!newFile.exists){
                                    var stream:FileStream = new FileStream();
                                    stream.open(newFile, FileMode.WRITE);
                                    stream.writeUTFBytes(str);
                                    stream.close();
                              }
                     }

            ]]>
      </fx:Script>
      <mx:Label text="XML文件选择" x="33" y="58" width="140"/>
      <mx:Button id="butFileID" y="88" label="选择文件" click="XmlFileSel('');" x="544"/>
      <mx:TextInput id="URLID" y="87" width="480" x="33"/>
      <mx:Button id="butSaveID" y="88" label="输出" click="XmlFlieSave('');" x="663"/>
</s:WindowedApplication>

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