public static int getMp3TrackLength(File mp3File) {  
    try {  
        MP3File f = (MP3File) AudioFileIO.read(mp3File);  
        MP3AudioHeader audioHeader = (MP3AudioHeader)f.getAudioHeader();  
        return audioHeader.getTrackLength();  
    } catch(Exception e) {  
    	e.printStackTrace();
        return 0;  
    }  
}
 

/**
 * 根据时间生成新的mp3文件（分别支持VBR 和 CBR）
 *
 * @param targetFileStr 要生成的目标mp3文件
 * @param beginTime
 * @param endTime
 * @return
 */
public void generateNewMp3ByTime(String targetFileStr, long beginTime, long endTime) throws Exception {
    MP3File mp3 = new MP3File(this.mSourceMp3File);
    MP3AudioHeader header = (MP3AudioHeader) mp3.getAudioHeader();
    if (header.isVariableBitRate()) {
        generateMp3ByTimeAndVBR(header, targetFileStr, beginTime, endTime);
    } else {
        generateMp3ByTimeAndCBR(header, targetFileStr, beginTime, endTime);
    }
}
 

/**
 * 获取MP3封面图片
 *
 * @param mp3File
 * @return
 */
public static byte[] getMP3Image(File mp3File) {
    byte[] imageData = null;
    try {
        MP3File mp3file = new MP3File(mp3File);
        AbstractID3v2Tag tag = mp3file.getID3v2Tag();
        AbstractID3v2Frame frame = (AbstractID3v2Frame) tag.getFrame("APIC");
        FrameBodyAPIC body = (FrameBodyAPIC) frame.getBody();
        imageData = body.getImageData();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return imageData;
}
 

private static String getMetaInfo(MP3File file, String key) {
    if (file.getID3v2Tag() == null || file.getID3v2Tag().frameMap == null
            || file.getID3v2Tag().frameMap.get(key) == null)
        return null;
    return ((AbstractID3v2Frame) file.getID3v2Tag().frameMap.get(key)).getBody().toString();
}
 

public static boolean setMetaInfo(MP3File file, FieldKey key, String value) throws FieldDataInvalidException {
    if (file.getID3v2Tag() == null)
        return false;
    file.getID3v2Tag().setField(key, value);
    return true;
}