使用javax.sound实现简单音频播放

/** 
* @see 
* @author Al_assad yulinying_1994@outlook.com 
* @date 2016年11月17日 下午6:27:59 
* @version V1.0  
* Description: 简易音频播放器（只支持AU，RA，WAV） 
*       在不使用JMF的情况下快速实现音频播放 
* 
*/ 
import javax.sound.sampled.*; 
import java.io.*; 
 
public class MusicPlayer { 
  private String musicPath; //音频文件 
  private volatile boolean run = true; //记录音频是否播放 
  private Thread mainThread;  //播放音频的任务线程 
   
  private AudioInputStream audioStream; 
  private AudioFormat audioFormat; 
  private SourceDataLine sourceDataLine; 
   
  public MusicPlayer(String musicPath) { 
    this.musicPath = musicPath; 
    prefetch(); 
  } 
   
  //数据准备 
  private void prefetch(){ 
    try{ 
    //获取音频输入流 
    audioStream = AudioSystem.getAudioInputStream(new File(musicPath)); 
    //获取音频的编码对象 
    audioFormat = audioStream.getFormat(); 
    //包装音频信息 
    DataLine.Info dataLineInfo = new DataLine.Info(SourceDataLine.class, 
        audioFormat,AudioSystem.NOT_SPECIFIED); 
    //使用包装音频信息后的Info类创建源数据行，充当混频器的源 
    sourceDataLine = (SourceDataLine)AudioSystem.getLine(dataLineInfo); 
     
    sourceDataLine.open(audioFormat); 
    sourceDataLine.start(); 
     
    }catch(UnsupportedAudioFileException ex){ 
      ex.printStackTrace(); 
    }catch(LineUnavailableException ex){ 
      ex.printStackTrace(); 
    }catch(IOException ex){ 
      ex.printStackTrace(); 
    } 
     
  } 
  //析构函数:关闭音频读取流和数据行 
  protected void finalize() throws Throwable{ 
    super.finalize(); 
    sourceDataLine.drain(); 
    sourceDataLine.close(); 
    audioStream.close(); 
  } 
   
  //播放音频:通过loop参数设置是否循环播放 
  private void playMusic(boolean loop)throws InterruptedException { 
    try{ 
        if(loop){ 
          while(true){ 
            playMusic(); 
          } 
        }else{ 
          playMusic(); 
          //清空数据行并关闭 
          sourceDataLine.drain(); 
          sourceDataLine.close(); 
          audioStream.close(); 
        } 
       
    }catch(IOException ex){ 
      ex.printStackTrace(); 
    } 
     
     
  } 
  private void playMusic(){ 
    try{ 
      synchronized(this){ 
        run = true; 
      } 
      //通过数据行读取音频数据流，发送到混音器; 
      //数据流传输过程：AudioInputStream -> SourceDataLine; 
      audioStream = AudioSystem.getAudioInputStream(new File(musicPath)); 
      int count; 
      byte tempBuff[] = new byte[1024]; 
       
        while((count = audioStream.read(tempBuff,0,tempBuff.length)) != -1){ 
          synchronized(this){ 
          while(!run) 
            wait(); 
          } 
          sourceDataLine.write(tempBuff,0,count); 
               
      } 
 
    }catch(UnsupportedAudioFileException ex){ 
      ex.printStackTrace(); 
    }catch(IOException ex){ 
      ex.printStackTrace(); 
    }catch(InterruptedException ex){ 
      ex.printStackTrace(); 
    } 
     
  } 
   
   
  //暂停播放音频 
  private void stopMusic(){ 
    synchronized(this){ 
      run = false; 
      notifyAll(); 
    } 
  } 
  //继续播放音乐 
  private void continueMusic(){ 
    synchronized(this){ 
       run = true; 
       notifyAll(); 
    } 
  } 
   
   
  //外部调用控制方法:生成音频主线程； 
  public void start(boolean loop){ 
    mainThread = new Thread(new Runnable(){ 
      public void run(){ 
        try { 
          playMusic(loop); 
        } catch (InterruptedException e) { 
          e.printStackTrace(); 
        } 
      } 
    }); 
    mainThread.start(); 
  } 
   
  //外部调用控制方法：暂停音频线程 
  public void stop(){ 
    new Thread(new Runnable(){ 
      public void run(){ 
        stopMusic(); 
         
      } 
    }).start(); 
  } 
  //外部调用控制方法：继续音频线程 
  public void continues(){ 
    new Thread(new Runnable(){ 
      public void run(){ 
        continueMusic(); 
      } 
    }).start(); 
  } 
 
//Test 
  public static void main(String[] args) throws InterruptedException{ 
 
    MusicPlayer player = new MusicPlayer("bgm/1.wav");  //创建音乐播放器 
     
    player.start(true);  //以开始以循环的形式播放，player(false)为不循环播放 
     
    TimeUnit.SECONDS.sleep(5); 
     
    player.stop();  //暂停播放音频 
     
    TimeUnit.SECONDS.sleep(4); 
     
    player.continues();  //继续开始播放音频 
     
  } 
 
 }