Air 安裝路徑下生成文本檔案和寫入内容

var fileStream:FileStream = new FileStream();
//指定在安裝路徑下生成Project.txt的檔案
var file:File = new File(File.applicationDirectory.resolvePath("Project.txt").nativePath);
fileStream.open(file,FileMode.WRITE);
//寫檔案内容
fileStream.writeUTFBytes("123");
fileStream.close();
trace(file.nativePath);