一：使用javasound api：
public void method1() {
File file = new File(“C:\\music\\test2.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 / 1000);
} catch (Exception e) {
e.printStackTrace();
}
}
网上有些同志说这段代码无法运行，我猜应该是缺少了mp3的解码插件，下载地址为：http://www.javazoom.net/mp3spi/mp3spi.html
二：使用jaudiotagger.jar包实现，网上搜下就能找到，代码如下：
public void method2() {
File file = new File(“C:\\music\\test2.mp3”);
try {
MP3File f = (MP3File)AudioFileIO.read(file);
MP3AudioHeader audioHeader = (MP3AudioHeader)f.getAudioHeader();
System.out.println(audioHeader.getTrackLength());
} catch(Exception e) {
e.printStackTrace();
}
}
三：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
}
}
这三种方法都只能获得本地音频文件的音乐时长，如果是获取网络音乐的时长，地址：http://www.javastar.net/?post=50
源码下载地址：http://download.csdn.net/detail/jys1109/5871797
