首选需要引入依赖：

<dependency><groupId>com.googlecode.soundlibs</groupId><artifactId>mp3spi</artifactId><version>1.9.5.4</version></dependency>

再导入以下工具类，就可以开始玩耍了

import java.io.File;
import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.SourceDataLine;
import javazoom.spi.mpeg.sampled.file.MpegAudioFileReader;
/*** MP3转PCM Java方式实现*/
public class ConvertMP32PCM {/*** MP3转换PCM文件方法* * @param mp3filepath*            原始文件路径* @param pcmfilepath*            转换文件的保存路径* @throws Exception*/public static void convertMP32PCM(String mp3filepath, String pcmfilepath) throws Exception {AudioInputStream audioInputStream = getPcmAudioInputStream(mp3filepath);AudioSystem.write(audioInputStream, AudioFileFormat.Type.WAVE, new File(pcmfilepath));}/*** 播放MP3方法* * @param mp3filepath* @throws Exception*/public static void playMP3(String mp3filepath) throws Exception {File mp3 = new File(mp3filepath);// 播放int k = 0, length = 8192;AudioInputStream audioInputStream = getPcmAudioInputStream(mp3filepath);if (audioInputStream == null)System.out.println("null audiostream");AudioFormat targetFormat;targetFormat = audioInputStream.getFormat();byte[] data = new byte[length];DataLine.Info dinfo = new DataLine.Info(SourceDataLine.class, targetFormat);SourceDataLine line = null;try {line = (SourceDataLine) AudioSystem.getLine(dinfo);line.open(targetFormat);line.start();int bytesRead = 0;byte[] buffer = new byte[length];while ((bytesRead = audioInputStream.read(buffer, 0, length)) != -1) {line.write(buffer, 0, bytesRead);}audioInputStream.close();line.stop();line.close();} catch (Exception ex) {ex.printStackTrace();System.out.println("audio problem " + ex);}}private static AudioInputStream getPcmAudioInputStream(String mp3filepath) {File mp3 = new File(mp3filepath);AudioInputStream audioInputStream = null;AudioFormat targetFormat = null;try {AudioInputStream in = null;MpegAudioFileReader mp = new MpegAudioFileReader();in = mp.getAudioInputStream(mp3);AudioFormat baseFormat = in.getFormat();targetFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, baseFormat.getSampleRate(), 16,baseFormat.getChannels(), baseFormat.getChannels() * 2, baseFormat.getSampleRate(), false);audioInputStream = AudioSystem.getAudioInputStream(targetFormat, in);} catch (Exception e) {e.printStackTrace();}return audioInputStream;}//使用mp3输入流转为音频输入流private AudioInputStream getPcmAudioInputStream(InputStream mp3Stream) {AudioInputStream audioInputStream = null;AudioFormat targetFormat = null;try {AudioInputStream in = null;//读取音频文件的类MpegAudioFileReader mp = new MpegAudioFileReader();in = mp.getAudioInputStream(mp3Stream);AudioFormat baseFormat = in.getFormat();//设定输出格式为pcm格式的音频文件targetFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, baseFormat.getSampleRate(), 16,baseFormat.getChannels(), baseFormat.getChannels() * 2, baseFormat.getSampleRate(), false);//输出到音频audioInputStream = AudioSystem.getAudioInputStream(targetFormat, in);} catch (Exception e) {e.printStackTrace();}return audioInputStream;}public static void main(String[] args) {String mp3filepath = "/home/bobxie/temp.mp3";String pcmfilepath = "/home/bobxie/temp.pcm";try {
//            ConvertMP32PCM.convertMP32PCM(mp3filepath, pcmfilepath);ConvertMP32PCM.playMP3(mp3filepath);} catch (Exception e) {e.printStackTrace();}}
}