Air 安装路径下生成文本文件和写入内容

var fileStream:FileStream = new FileStream();
//指定在安装路径下生成Project.txt的文件
var file:File = new File(File.applicationDirectory.resolvePath("Project.txt").nativePath);
fileStream.open(file,FileMode.WRITE);
//写文件内容
fileStream.writeUTFBytes("123");
fileStream.close();
trace(file.nativePath);