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        }   }