读取文件内容，返回字符串

import flash.filesystem.File;
	import flash.filesystem.FileMode;
	import flash.filesystem.FileStream;

/**
		 * 读取文本 字符串 
		 * @param	_pathUrl  文本路径
		 * @return  字符串
		 */
		public static function readFile(_pathUrl:String):String{
			var fileStream:FileStream = new FileStream();			
			fileStream.open(new File(_pathUrl), FileMode.READ);
			var data_str:String= fileStream.readUTFBytes(fileStream.bytesAvailable);
			fileStream.close();
			return data_str;
		}

//延伸
var dir:File = File.applicationDirectory; //应用程序安装目录
var dir:File = File.getRootDirectories(); //文件系统根目录
var file:File = File.userDirectory; //指向用户文件夹
var file:File = File.documentsDirectory; //指向用户文档文件夹
var file:File = File.desktopDirectory; //指向桌面
var file:File = File.applicationStorageDirectory; //指向应用程序存储目录

var file:File = File.userDirectory;
file = file.resolvePath(“Mousebomb”);

trace(file.nativePath);