使用JMF实现java视频播放器

package com.bird.jmf;
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.Panel;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import javax.media.CannotRealizeException;
import javax.media.ControllerEvent;
import javax.media.ControllerListener;
import javax.media.EndOfMediaEvent;
import javax.media.Manager;
import javax.media.MediaLocator;
import javax.media.NoPlayerException;
import javax.media.Player;
import javax.media.PrefetchCompleteEvent;
import javax.media.RealizeCompleteEvent;
import javax.media.Time;
@SuppressWarnings({ "restriction", "unused" })
public class JMFSample implements ControllerListener {
 public static void main(String[] args) {
  JMFSample sp = new JMFSample();
  sp.play();
 }
 private Player mediaPlayer;
 private Frame f;
 private Player player;
 private Panel panel;
 private Component visual;
 private Component control = null;
 public void play(){
  f = new Frame("JMF Sample1");
  f.addWindowListener(new WindowAdapter() {
   public void windowClosing(WindowEvent we) {
    if(player != null) {
     player.close();
    }
    System.exit(0);
   }
  });
  f.setSize(500,400);
  f.setVisible(true);
  URL url = null;
  try {
   //准备一个要播放的视频文件的URL
   url = new URL("file:/d:/2.mpg");
  } catch (MalformedURLException e) {
   e.printStackTrace();
  }  
  try {
   //通过调用Manager的createPlayer方法来创建一个Player的对象
   //这个对象是媒体播放的核心控制对象
   player = Manager.createPlayer(url);
  } catch (NoPlayerException e1) {
   e1.printStackTrace();
  } catch (IOException e1) {
   e1.printStackTrace();
  } 
  //对player对象注册监听器，能噶偶在相关事件发生的时候执行相关的动作
  player.addControllerListener(this);
  //让player对象进行相关的资源分配
  player.realize();
 }
 private int videoWidth = 0;
 private int videoHeight = 0;
 private int controlHeight = 30;
 private int insetWidth = 10;
 private int insetHeight = 30;
 //监听player的相关事件
 public void controllerUpdate(ControllerEvent ce) {
  if (ce instanceof RealizeCompleteEvent) {
   //player实例化完成后进行player播放前预处理
   player.prefetch();
  } else if (ce instanceof PrefetchCompleteEvent) {
   if (visual != null)
    return;
   //取得player中的播放视频的组件，并得到视频窗口的大小
   //然后把视频窗口的组件添加到Frame窗口中，
   if ((visual = player.getVisualComponent()) != null) {
    Dimension size = visual.getPreferredSize();
    videoWidth = size.width;
    videoHeight = size.height;
    f.add(visual);
   } else {
    videoWidth = 320;
   }
   //取得player中的视频播放控制条组件，并把该组件添加到Frame窗口中
   if ((control = player.getControlPanelComponent()) != null) {
    controlHeight = control.getPreferredSize().height;
    f.add(control, BorderLayout.SOUTH);
   }
   //设定Frame窗口的大小，使得满足视频文件的默认大小
   f.setSize(videoWidth + insetWidth, videoHeight + controlHeight + insetHeight);
   f.validate();
   //启动视频播放组件开始播放
   player.start();
   mediaPlayer.start();
  } else if (ce instanceof EndOfMediaEvent) {
   //当播放视频完成后，把时间进度条恢复到开始，并再次重新开始播放
   player.setMediaTime(new Time(0));
   player.start();
  }
 }
}