Java 课程设计

在这周 我们继续接着上周的工程配置做视频播放器 这周我们完成了视频播放器的播放 播放，暂停，停止按钮的添加和功能实现，菜单栏的添加和功能实现 按原计划第十四周的任务基本完成 在制作过程中遇到了不少难题 如libvlc无法导入 布局结构设计问题 进度条功能实现等等一系列问题 在老师的帮助下和我们组共同努力下 终于算是基本解决这些问题 也将这周需要完成的界面和功能实现 这周的成果在下方

代码如下：
（1）videoplayer.main包 PlayMain类
import java.awt.EventQueue;
import java.io.File;

import javax.swing.JFileChooser;
import javax.swing.SwingWorker;

import com.sun.jna.NativeLibrary;

import uk.co.caprica.vlcj.binding.LibVlc;
import uk.co.caprica.vlcj.discovery.NativeDiscovery;
import uk.co.caprica.vlcj.runtime.RuntimeUtil;
import videoplayer.views.MainWindow;

public class PlayMain {

static MainWindow frame;

public static void main(String[] args) {
	if(RuntimeUtil.isMac()){
	 NativeLibrary.addSearchPath(RuntimeUtil.getLibVlcLibraryName(),"/home/vlc");
        System.out.println(LibVlc.INSTANCE.libvlc_get_version());
	}else if(RuntimeUtil.isNix()){
		 NativeLibrary.addSearchPath(RuntimeUtil.getLibVlcLibraryName(),"/home/linux/vlc/install/lib");	
		 System.out.println(LibVlc.INSTANCE.libvlc_get_version());
	}else if(RuntimeUtil.isWindows()){
		NativeLibrary.addSearchPath(RuntimeUtil.getLibVlcLibraryName(),"C:\Program Files\VideoLAN\VLC");
		System.out.println(LibVlc.INSTANCE.libvlc_get_version());
	}
	boolean found = new NativeDiscovery().discover();
    System.out.println(found);
    System.out.println(LibVlc.INSTANCE.libvlc_get_version());
    
    EventQueue.invokeLater(new Runnable() {
		public void run() {
			try {
				 frame = new MainWindow();
				frame.setVisible(true);
				frame.getMediaPlayer().prepareMedia("E:\BaiduYunDownload\haskjdhaskjdhkasjdhkasjhdkjasd.mkv");
				//frame.getMediaPlayer().playMedia("E:\BaiduYunDownload\haskjdhaskjdhkasjdhkasjhdkjasd.mkv");
			
				
				new SwingWorker<String, Integer>() {

					@Override
					protected String doInBackground() throws Exception {
						while (true) {
							long total = frame.getMediaPlayer().getLength();
							long curr = frame.getMediaPlayer().getTime();
							float percent = (float)curr/total;
							publish((int)(percent*100));
							Thread.sleep(100);
						}
					}

					protected void process(java.util.List<Integer> chunks) {
						for (int v : chunks) {
							frame.getProgressBar().setValue(v);
						}
					}
				}.execute();
				
				
				
				
			
				}catch (Exception e) {
				e.printStackTrace();
			}
		}
	});
        

	
}

//播放方法
public static void play(){
	frame.getMediaPlayer().play();
}

public static void pause(){
	frame.getMediaPlayer().pause();
}

public static void stop(){
	frame.getMediaPlayer().stop();
}

public static void jumpTo(float to) {
	frame.getMediaPlayer().setTime((long)(to*frame.getMediaPlayer().getLength()));
}



public static void openVideo() {
	JFileChooser chooser = new JFileChooser();
	int v = chooser.showOpenDialog(null);
	if (v == JFileChooser.APPROVE_OPTION) {
		File file = chooser.getSelectedFile();
		frame.getMediaPlayer().playMedia(file.getAbsolutePath());
	}
}

public static void openSubtitle() {
	JFileChooser chooser = new JFileChooser();
	int v = chooser.showOpenDialog(null);
	if (v == JFileChooser.APPROVE_OPTION) {
		File file = chooser.getSelectedFile();
		frame.getMediaPlayer().setSubTitleFile(file);
	}
}

public static void exit() {
	frame.getMediaPlayer().release();
	System.exit(0);
}

}

（2）videoplayer.views包 MainWindow类
import java.awt.BorderLayout;
import java.awt.EventQueue;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.border.EmptyBorder;

import uk.co.caprica.vlcj.component.EmbeddedMediaPlayerComponent;
import uk.co.caprica.vlcj.player.embedded.EmbeddedMediaPlayer;
import videoplayer.main.PlayMain;

public class MainWindow extends JFrame {

private JPanel contentPane;
EmbeddedMediaPlayerComponent playerComponent;
private JPanel panel;
private JButton btnPlay;
private JButton btnPause;
private JButton btnStop;
private JPanel controlPanel;
private JProgressBar progress;
private JMenuBar menuBar;
private JMenu mnFile;
private JMenuItem mntmOpenVideo;
private JMenuItem mntmOpenSubtitle;
private JMenuItem mntmExit;

/**
 * Launch the application.
 */
public static void main(String[] args) {
	
}

/**
 * Create the frame.
 */
public MainWindow() {
	setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	setBounds(100, 100, 600, 400);
	
	menuBar = new JMenuBar();
	setJMenuBar(menuBar);
	mnFile = new JMenu("文件");
	menuBar.add(mnFile);
	
	mntmOpenVideo = new JMenuItem("打开视频");
	mnFile.add(mntmOpenVideo);
	
	mntmOpenSubtitle = new JMenuItem("导入字幕");
	mnFile.add(mntmOpenSubtitle);
	
	mntmExit = new JMenuItem("退出");
	mnFile.add(mntmExit);
	
	mntmOpenVideo.addActionListener(new ActionListener() {
		
		@Override
		public void actionPerformed(ActionEvent e) {
			PlayMain.openVideo();
		}
	});
	
	mntmOpenSubtitle.addActionListener(new ActionListener() {
		
		@Override
		public void actionPerformed(ActionEvent e) {
			PlayMain.openSubtitle();
		}
	});
	
	mntmExit.addActionListener(new ActionListener() {
		
		@Override
		public void actionPerformed(ActionEvent e) {
			PlayMain.exit();
		}
	});
	
	
	contentPane = new JPanel();
	contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
	contentPane.setLayout(new BorderLayout(0, 0));
	setContentPane(contentPane);
	
	JPanel videopane = new JPanel();
	contentPane.add(videopane, BorderLayout.CENTER);
	videopane.setLayout(new BorderLayout(0, 0));
	
	playerComponent = new EmbeddedMediaPlayerComponent();
	videopane.add(playerComponent);
	
	panel = new JPanel();
	videopane.add(panel, BorderLayout.SOUTH);
	panel.setLayout(new BorderLayout(0, 0));
	
	controlPanel = new JPanel();
	panel.add(controlPanel);
	
	btnStop = new JButton("停止");
	controlPanel.add(btnStop);
	
	btnPlay = new JButton("播放");
	controlPanel.add(btnPlay);
	
	btnPause = new JButton("暂停");
	controlPanel.add(btnPause);
	
	
	
	
	progress = new JProgressBar();
	progress.addMouseListener(new MouseAdapter() {
		@Override
		public void mouseClicked(MouseEvent e) {
			int x = e.getX();
			PlayMain.jumpTo((float)x/progress.getWidth());
		}
	});
	progress.setStringPainted(true);
	panel.add(progress, BorderLayout.NORTH);
	
	
	btnPause.addMouseListener(new MouseAdapter() {
		@Override
		public void mouseClicked(MouseEvent e) {
			PlayMain.pause();
		}
	});
	btnPlay.addMouseListener(new MouseAdapter() {
		@Override
		public void mouseClicked(MouseEvent arg0) {
			PlayMain.play();
		}
	});
	btnStop.addMouseListener(new MouseAdapter() {
		@Override
		public void mouseClicked(MouseEvent e) {
			PlayMain.stop();
		}
	});
}
public EmbeddedMediaPlayer getMediaPlayer(){
	return playerComponent.getMediaPlayer();
}

public JProgressBar getProgressBar() {
	return progress;
}

}

（二）下面是程序实现的图片
（1）代码中指定的视频可以播放，可以通过播放，暂停，停止按钮进行控制，进度条可以实现进度变化

（2）文件菜单栏下，打开视频，导出字幕，退出可以使用，有响应。