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作业其实还是自己写的好。要用到JMF包啊，到网上下载一个JMF包，照着说明安装上。

以下是我写e68a84e8a2ad62616964757a686964616f31333332643336的一个很简单的播放器，只能播放mp3，mpeg，mpg，wav等简单的格式。

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import javax.media.ControllerEvent;

import javax.media.ControllerListener;

import javax.media.MediaLocator;

import javax.media.RealizeCompleteEvent;

import javax.media.bean.playerbean.MediaPlayer;

import javax.swing.JPanel;

import javax.swing.JFrame;

import javax.swing.SwingUtilities;

import javax.swing.JList;

import java.awt.BorderLayout;

import javax.swing.JSplitPane;

import java.awt.Component;

import java.util.Vector;

public class JMF_T extends JFrame implements ControllerListener, ActionListener {

MediaPlayer Player;

private String filename = "";

private static final long serialVersionUID = 1L;

private Vector vct = new Vector(); // @jve:decl-index=0:

private JPanel jContentPane = null;

private JSplitPane jSplitPane = null;

private JPanel playPanel = null;

private JList jList = null;

private JSplitPane getJSplitPane() {

if (jSplitPane == null) {

jSplitPane = new JSplitPane();

jSplitPane.setDividerSize(5);

jSplitPane.setResizeWeight(0.8);

jSplitPane.setRightComponent(getJList());

jSplitPane.setLeftComponent(getPlayPanel());

}

return jSplitPane;

}

private JPanel getPlayPanel() {

if (playPanel == null) {

playPanel = new JPanel();

playPanel.setLayout(new BorderLayout());

}

return playPanel;

}

private JList getJList() {

if (jList == null) {

jList = new JList();

jList.addMouseListener(new java.awt.event.MouseAdapter() {

public void mouseClicked(java.awt.event.MouseEvent e) {

// TODO Auto-generated Event stub mouseClicked()

if (e.getClickCount() == 1) {

String str = (String) jList.getSelectedValue();

if (str == null) {

return;

}

filename = str;

System.out.println(str);

}

if (e.getClickCount() == 2) {

String str = (String) jList.getSelectedValue();

if (str == null) {

return;

}

filename = str;

play();

}

}

});

}

return jList;

}

public static void main(String[] args) {

SwingUtilities.invokeLater(new Runnable() {

public void run() {

JMF_T thisClass = new JMF_T();

thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

thisClass.setVisible(true);

}

});

}

public JMF_T() {

initialize();

}

private void OpenFile() {

FileDialog fd = new FileDialog(this, "Choose Video", FileDialog.LOAD);

fd.setVisible(true);

filename = fd.getDirectory() + fd.getFile();

System.out.println(filename);

if (filename.equals("")) {

return;

} else if (filename.equals("nullnull")) {

return;

}

boolean j = false;

for (int i = 0; i < vct.size(); i++) {

if (vct.get(i).toString().equals(filename)) {

j = true;

break;

}

}

if (j == false) {

vct.add(filename);

jList.setListData(vct);

}

}

private void stop() {

if (Player != null) {

Player.stop();

Player.deallocate();

}

}

private void play() {

try {

if (filename.equals("")) {

return;

}

if (Player == null) {

Player = new MediaPlayer();

} else {

closePreviosPlayer();

}

Player.setMediaLocator(new MediaLocator("file:///" + filename));

Player.addControllerListener(this);

Player.realize();

Player.start();

} catch (Exception e) {

}

}

public void actionPerformed(ActionEvent e) {

String action = e.getActionCommand().toString();

if (action.equals("Open")) {

OpenFile();

}

if (action.equals("Play")) {

play();

}

if (action.equals("Stop")) {

stop();

}

if (action.equals("Exit")) {

dispose();

System.exit(0);

}

}

private void initialize() {

this.setSize(500, 350);

setLocation(300, 100);

this.setContentPane(getJContentPane());

addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent e) {

dispose();

System.exit(0);

}

});

MenuBar mb = new MenuBar();

setMenuBar(mb);

Menu fileMenu = new Menu("File");

Menu actMenu = new Menu("Action");

mb.add(fileMenu);

mb.add(actMenu);

MenuItem itemOpen = new MenuItem("Open");

itemOpen.addActionListener(this);

fileMenu.add(itemOpen);

fileMenu.addSeparator();

MenuItem itemPlay = new MenuItem("Play");

itemPlay.addActionListener(this);

actMenu.add(itemPlay);

actMenu.addSeparator();

MenuItem itemStop = new MenuItem("Stop");

itemStop.addActionListener(this);

actMenu.add(itemStop);

MenuItem itemExit = new MenuItem("Exit");

itemExit.addActionListener(this);

fileMenu.add(itemExit);

this.validate();

this.setVisible(true);

}

private JPanel getJContentPane() {

if (jContentPane == null) {

jContentPane = new JPanel();

jContentPane.setLayout(new BorderLayout());

jContentPane.add(getJSplitPane(), BorderLayout.CENTER);

}

return jContentPane;

}

private void closePreviosPlayer() {

if (Player == null)

return;

Player.stop();

Player.deallocate(); // 停止播放并且重新装载DateSource

Component visual = Player.getVisualComponent();

Component control = Player.getControlPanelComponent();

if (visual != null) {

playPanel.remove(visual);

}

if (control != null) {

playPanel.remove(control);

}

}

public synchronized void controllerUpdate(ControllerEvent event) {

if (event instanceof RealizeCompleteEvent) {

Component comp;

if ((comp = Player.getControlPanelComponent()) != null) {

playPanel.add("South", comp);

} else {

closePreviosPlayer();

}

if ((comp = Player.getVisualComponent()) != null) {

playPanel.add("Center", comp);

}

validate();

}

}

}

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