用代码java 实现视频断点播放

当视频被暂停时，保存当前的播放进度。当用户需要恢复播放时，可以根据保存的播放进度来继续播放视频。

以下是用Java实现视频断点播放的代码示例：

import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.media.*;
import javax.media.protocol.*;
import javax.media.format.*;
import javax.media.protocol.DataSource;
import java.net.*;

public class VideoPlayer extends JFrame implements ControllerListener {
  private MediaLocator mediaLocator = null;
  private Player player = null;
  private Component visualComponent = null;
  private Component controlComponent = null;
  private Container contentPane = null;

  private int pauseLocation;

  public VideoPlayer(String mediaURL) {
    super("Video Player");

    try {
      mediaLocator = new MediaLocator(mediaURL);

      player = Manager.createPlayer(mediaLocator);
      player.addControllerListener(this);
      player.realize();
      while (player.getState() != player.Realized) {
        Thread.sleep(10);
      }

      visualComponent = player.getVisualComponent();
      if (visualComponent != null) {
        contentPane = getContentPane();
        contentPane.add(visualComponent, BorderLayout.CENTER);
      }

      controlComponent = player.getControlPanelComponent();
      if (controlComponent != null) {
        contentPane.add(controlComponent, BorderLayout.SOUTH);
      }

      setPreferredSize(new Dimension(640, 480));
      pack();
      setVisible(true);
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  public void controllerUpdate(ControllerEvent event) {
    if (event instanceof EndOfMediaEvent) {
      player.setMediaTime(new Time(pauseLocation));
      player.stop();
    }
  }

  public void pause() {
    player.stop();
    pauseLocation = (int)player.getMediaTime().getSeconds();
  }

  public void play() {
    player.setMediaTime(new Time(pauseLocation));
    player.start();
  }

  public static void main(String[] args) {
    VideoPlayer player = new VideoPlayer(args[0]);

    JFrame frame = new JFrame("Video Player");
    JPanel panel = new JPanel();
    JButton playButton = new JButton("Play");
    JButton pauseButton = new JButton("Pause");

    playButton.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        player.play();
      }
    });

    pauseButton.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        player.pause();
      }
    });

    panel.add(playButton);
    panel.add(pauseButton);

    frame.getContentPane().add(player);
    frame.getContentPane().add(panel, BorderLayout.NORTH);
    frame.pack();
    frame.setVisible(true);
  }
}