如何使用Java代码获取播放文件的时长

java中直接使用AudioInputStream类来操作音乐文件，获取时长，实例如下：
import java.io.File;
import java.io.IOException;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;
public class AudioLength {
public static void main(String[] args) throws LineUnavailableException,
UnsupportedAudioFileException, IOException {
File file = new File("d:/test.wav");
Clip clip = AudioSystem.getClip();
AudioInputStream ais = AudioSystem.getAudioInputStream(file);
clip.open(ais);
System.out.println( clip.getMicrosecondLength() / 1000000D + " s" );//获取音频文件时长
}
}