Flex的读取本地XML文件方式

网上整理几种方式:

方式一：

??? flash.filesystem包下的类，文件流读取

private function readxml1():void{ 
var xmlfile:file = new file("file path"); 
var stream:filestream = new filestream(); 
stream.open(xmlfile,filemode.read); 
var xml:xml = xml(stream.readutfbytes(stream.bytesavailable)); 
stream.close(); 
} 

方式二：

?? flash.net 包下的网络相关类

private function readxml2():void{ 
var urlrequest:urlrequest = new urlrequest("xml file path"); 
var urlloader:urlloader = new urlloader(urlrequest); 
urlloader.addeventlistener(event.complete,completehandler); 
} 

private function completehandler(event:event):void{ 
var xml:xml = new xml(event.target.data); 
trace(xml); 
} 

方式三：

???

public static function writexmlfile(xml:xml):void{ 
var stream:filestream = new filestream(); 
var xmlfile:file = new file("file path"); 
var outputstring:string = 'n'; 
outputstring += xml.toxmlstring(); 
outputstring = outputstring.replace(/n/g,file.lineending); 
stream = new filestream(); 
stream.open(xmlfile,filemode.write); 
stream.writeutfbytes(outputstring); 
stream.close(); 
} 

?

方式四：

??? MXML标签引用本地XML数据到flex页面

??<mx:XML source="本地url"/>? ?