shell，java，php代码如何批量计算音频文件的总时长？

File file = new File("G:\\8.mp3");
long total = 0;
try {
AudioFileFormat aff = AudioSystem.getAudioFileFormat(file);
Map props = aff.properties();
if (props.containsKey("duration"))
total = (long) Math.round((((Long) props.get("duration"))
.longValue())/1000);
System.out.println(total);
} catch (UnsupportedAudioFileException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}