flash Air 在同一个目录下面创建txt，写入字

import flash.filesystem.*;

var file:File=new File(File.applicationDirectory.nativePath + '/HelloWorld.txt');
var stream:FileStream = new FileStream()
stream.open(file, FileMode.WRITE);
var str:String = "Congratulations on AIR Save Path";
stream.writeUTFBytes(str);
stream.close();