使用JMF實現java視頻播放器

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 {
   //準備一個要播放的視頻文件的URL
   url = new URL("file:/d:/2.mpg");
  } catch (MalformedURLException e) {
   e.printStackTrace();
  }  
  try {
   //通過調用Manager的createPlayer方法來創建一個Player的對象
   //這個對象是媒體播放的核心控制對象
   player = Manager.createPlayer(url);
  } catch (NoPlayerException e1) {
   e1.printStackTrace();
  } catch (IOException e1) {
   e1.printStackTrace();
  } 

  //對player對象注冊監聽器，能噶偶在相關事件發生的時候執行相關的動作
  player.addControllerListener(this);
  
  //讓player對象進行相關的資源分配
  player.realize();
 }
 
 private int videoWidth = 0;
 private int videoHeight = 0;
 private int controlHeight = 30;
 private int insetWidth = 10;
 private int insetHeight = 30;
 
 //監聽player的相關事件
 public void controllerUpdate(ControllerEvent ce) {
  if (ce instanceof RealizeCompleteEvent) {
   //player實例化完成后進行player播放前預處理
   player.prefetch();
  } else if (ce instanceof PrefetchCompleteEvent) {
   if (visual != null)
    return;

   //取得player中的播放視頻的組件，并得到視頻窗口的大小
   //然后把視頻窗口的組件添加到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中的視頻播放控制條組件，并把該組件添加到Frame窗口中
   if ((control = player.getControlPanelComponent()) != null) {
    controlHeight = control.getPreferredSize().height;
    f.add(control, BorderLayout.SOUTH);
   }
   
   //設定Frame窗口的大小，使得滿足視頻文件的默認大小
   f.setSize(videoWidth + insetWidth, videoHeight + controlHeight + insetHeight);
   f.validate();
   
   //啟動視頻播放組件開始播放
   player.start();
   mediaPlayer.start();
  } else if (ce instanceof EndOfMediaEvent) {
   //當播放視頻完成后，把時間進度條恢復到開始，并再次重新開始播放
   player.setMediaTime(new Time(0));
   player.start();
  }
 }

}