expaudioplayer.java

一个基于JMF开发的播放本地文mp3件的小程序。 非常短小

/**
基于JMF框架开发的 
一个播放本地MP3的短小的程序
 */



import javax.media.*;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.net.MalformedURLException;

public class ExpAudioPlayer {
 private Player audioPlayer = null;
 
 public ExpAudioPlayer(URL url) 
        throws IOException,NoPlayerException,CannotRealizeException {
  audioPlayer = Manager.createRealizedPlayer(url);
 }
 public ExpAudioPlayer(File file) 
        throws IOException,NoPlayerException,CannotRealizeException {
  this(file.toURL());
 }
 public ExpAudioPlayer(String filename)
        throws IOException,NoPlayerException,CannotRealizeException {
   this(new File(filename));
 }

 //获得曲目的总时间
 public long getTotalTime(){
  Time t=audioPlayer.getDuration();
  long l=(long)(t.getSeconds());
  return l;
 }
 //播放
 public void play(){
  audioPlayer.start();
 }
 //停止播放
 public void stop(){
  audioPlayer.stop();
  audioPlayer.close();
 }
 //主程序
 public static void main(String[] args){
   if(args.length==0){
      System.out.println("Usage:\n");
      System.out.println("java ql.abs.ExpAudioPlayer filename");
      return;
   }
   String filename=args[0];
   try{ 
      ExpAudioPlayer player=new ExpAudioPlayer(filename);
      //开始播放
      player.play();
      //延时曲目长度，以便曲目可以正常播放完成
      Thread.sleep(player.getTotalTime()*1000);
      //结束播放
      player.stop();
      System.exit(0);
   }catch (Exception e){
      e.printStackTrace();
      System.exit(0);
   }
 }
}