以下是我写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 = 0i <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()

}

}

}

import javax.media.*

import java.io.IOException

import java.util.ArrayList

import java.util.List

public class PlayerMusic implements ControllerListener {// ControllerListener

// 控制事件

private Player player

private boolean first, loop

private String path

private List mp3List

private int mp3NO = 0

PlayerMusic(List mp3List) {

this.mp3List = mp3List

}

public void start() {

try {

player = Manager.createPlayer(new MediaLocator("file://" + mp3List.get(mp3NO)))

} catch (NoPlayerException ex) {

ex.printStackTrace()

System.out.println("不能播放文件")

return

} catch (IOException ex) {

ex.printStackTrace()

return

}

if (player == null) {

System.out.println("播放器为空")

return

}

first = false

player.addControllerListener(this)

// 提取媒体内容

player.prefetch()

}

public void controllerUpdate(ControllerEvent e) {

// 当媒体播放结束时,循环播放

if (e instanceof EndOfMediaEvent) {

mp3NO++

if(mp3NO<this.mp3List.size()){

this.start()

}

return

}

// 当预提取媒体的内容结束

if (e instanceof PrefetchCompleteEvent) {

player.start()

return

}

// 当实例化后

if (e instanceof RealizeCompleteEvent) {

// pack()//执行pack()操作

return

}

}

public static void main(String[] args) {

List mp3List = new ArrayList()

mp3List.add("d://a.mp3")

mp3List.add("d://b.mp3")

mp3List.add("d://c.mp3")

PlayerMusic pm = new PlayerMusic(mp3List)

pm.start()

}

}

首先下载播放mp3的包，比如mp3spi1.9.4.jar。在工程中添加这个包。

播放器演示代码如下

import java.io.File

import java.awt.BorderLayout

import java.awt.FileDialog

import java.awt.Frame

import java.awt.GridLayout

import java.awt.Label

import java.awt.List

import java.awt.Menu

import java.awt.MenuBar

import java.awt.MenuItem

import java.awt.MenuShortcut

import java.awt.Panel

import java.awt.event.ActionEvent

import java.awt.event.ActionListener

import java.awt.event.KeyEvent

import java.awt.event.MouseAdapter

import java.awt.event.MouseEvent

import java.awt.event.WindowAdapter

import java.awt.event.WindowEvent

import javax.sound.sampled.AudioFormat

import javax.sound.sampled.AudioInputStream

import javax.sound.sampled.AudioSystem

import javax.sound.sampled.DataLine

import javax.sound.sampled.SourceDataLine

public class MusicPlayer extends Frame {

    /**

 * 

 */

private static final long serialVersionUID = -2605658046194599045L

boolean isStop = true// 控制播放线程

    boolean hasStop = true// 播放线程状态

    String filepath// 播放文件目录

    String filename// 播放文件名称

    AudioInputStream audioInputStream// 文件流

    AudioFormat audioFormat// 文件格式

    SourceDataLine sourceDataLine// 输出设备

    List list// 文件列表

    Label labelfilepath//播放目录显示标签

    Label labelfilename//播放文件显示标签

    public MusicPlayer() {

        // 设置窗体属性

        setLayout(new BorderLayout())

        setTitle("MP3 Music Player")

        setSize(350, 370)

        // 建立菜单栏

        MenuBar menubar = new MenuBar()

        Menu menufile = new Menu("File")

        MenuItem menuopen = new MenuItem("Open", new MenuShortcut(KeyEvent.VK_O))

        menufile.add(menuopen)

        menufile.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {

                open()

            }

        })

        menubar.add(menufile)

        setMenuBar(menubar)

        // 文件列表

        list = new List(10)

        list.addMouseListener(new MouseAdapter() {

            public void mouseClicked(MouseEvent e) {

                // 双击时处理

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

                    // 播放选中的文件

                    filename = list.getSelectedItem()

                    play()

                }

            }

        })

        add(list, "Center")

        // 信息显示

        Panel panel = new Panel(new GridLayout(2, 1))

        labelfilepath = new Label("Dir：")

        labelfilename = new Label("File：")

        panel.add(labelfilepath)

        panel.add(labelfilename)

        add(panel, "North")

        // 注册窗体关闭事件

        addWindowListener(new WindowAdapter() {

            public void windowClosing(WindowEvent e) {

                System.exit(0)

            }

        })

        setVisible(true)

    }

    // 打开

    private void open() {

        FileDialog dialog = new FileDialog(this, "Open", 0)

        dialog.setVisible(true)

        filepath = dialog.getDirectory()

        if (filepath != null) {

            labelfilepath.setText("Dir：" + filepath)

            // 显示文件列表

            list.removeAll()

            File filedir = new File(filepath)

            File[] filelist = filedir.listFiles()

            for (File file : filelist) {

                String filename = file.getName().toLowerCase()

                if (filename.endsWith(".mp3") || filename.endsWith(".wav")) {

                    list.add(filename)

                }

            }

        }

    }

    // 播放

    private void play() {

        try {

            isStop = true// 停止播放线程

            // 等待播放线程停止

            System.out.print("Start：" + filename)

            while (!hasStop) {

                System.out.print(".")

                try {

                    Thread.sleep(10)

                } catch (Exception e) {

                }

            }

            System.out.println("")

            File file = new File(filepath + filename)

            labelfilename.setText("Playing：" + filename)

            // 取得文件输入流

            audioInputStream = AudioSystem.getAudioInputStream(file)

            audioFormat = audioInputStream.getFormat()

            // 转换mp3文件编码

            if (audioFormat.getEncoding() != AudioFormat.Encoding.PCM_SIGNED) {

                audioFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,

                        audioFormat.getSampleRate(), 16, audioFormat

                                .getChannels(), audioFormat.getChannels() * 2,

                        audioFormat.getSampleRate(), false)

                audioInputStream = AudioSystem.getAudioInputStream(audioFormat,

                        audioInputStream)

            }

            // 打开输出设备

            DataLine.Info dataLineInfo = new DataLine.Info(

                    SourceDataLine.class, audioFormat,

                    AudioSystem.NOT_SPECIFIED)

            sourceDataLine = (SourceDataLine) AudioSystem.getLine(dataLineInfo)

            sourceDataLine.open(audioFormat)

            sourceDataLine.start()

            // 创建独立线程进行播放

            isStop = false

            Thread playThread = new Thread(new PlayThread())

            playThread.start()

        } catch (Exception e) {

            e.printStackTrace()

        }

    }

    class PlayThread extends Thread {

        byte tempBuffer[] = new byte[320]

        public void run() {

            try {

                int cnt

                hasStop = false

                // 读取数据到缓存数据

                while ((cnt = audioInputStream.read(tempBuffer, 0,

                        tempBuffer.length)) != -1) {

                    if (isStop)

                        break

                    if (cnt > 0) {

                        // 写入缓存数据

                        sourceDataLine.write(tempBuffer, 0, cnt)

                    }

                }

                // Block等待临时数据被输出为空

                sourceDataLine.drain()

                sourceDataLine.close()

                hasStop = true

            } catch (Exception e) {

                e.printStackTrace()

                System.exit(0)

            }

        }

    }

    public static void main(String args[]) {

        new MusicPlayer()

    }

}