编写代码实现制作一个音频文件播放器。只需要实现如图所示的简单界面，点击打开弹出对话框，打开一个.wav的波形音频文件，点击“播放”按钮开始播放，点击“停止”按钮则停止播放，按“关机”按钮则退出应用程序。-Develop code that implements an audio file player. Only need to implement a simple interface as shown, click to open the pop-up dialog box to open a. Wav waveform audio file, click on the " Play"　button to start playing, click on the " Stop"　button to stop playback, press the " off"　button to exit the application.