本文目录一览：
如何用java做一个音乐播放器？
看看其它网友的答案： 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
package com.test.audio;
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();
}
}
求用java编写MP3播放器
这个需要jmf的相关包,去网上下载下,给你写了个例子
public class TestPlay extends JFrame {
private Component vc, cc;
private JButton file = new JButton("file");
private Player player = null;
public TestPlay() throws HeadlessException, NoPlayerException, MalformedURLException, IOException {
this.add(file);
file.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
JFileChooser f = new JFileChooser();
if(f.showOpenDialog(null)==JFileChooser.CANCEL_OPTION)return;
try {
player = Manager.createPlayer(f.getSelectedFile().toURL());
player.addControllerListener(new ControllerListener() {
public void controllerUpdate(ControllerEvent arg0) {
controllerUpdateImp(arg0);
}
});
player.prefetch();
} catch (Exception e) {
System.out.println(e);
JOptionPane.showMessageDialog(null, e.getMessage());
}
}
});
}
public void controllerUpdateImp(ControllerEvent e) {
if (e instanceof EndOfMediaEvent) {
player.setMediaTime(new Time(0));
player.start();
} else if (e instanceof PrefetchCompleteEvent) {
player.start();
} else if (e instanceof RealizeCompleteEvent) {
vc = player.getVisualComponent();
if (vc != null) this.add(vc, BorderLayout.CENTER);
cc = player.getControlPanelComponent();
if (cc != null) this.add(cc, BorderLayout.SOUTH);
this.pack();
this.setResizable(false);
this.setVisible(true);
} else if (e instanceof ControllerClosedEvent) {
System.exit(0);
}
}
public static void main(String[] args) {
TestPlay t;
try {
t = new TestPlay();
t.setDefaultCloseOperation(t.EXIT_ON_CLOSE);
t.pack();
t.setLocationRelativeTo(null);
t.setVisible(true);
} catch (Exception e) {
JOptionPane.showMessageDialog(null, e.getMessage());
}
}
}
怎么用Java写一个简单的mp3播放器，用外部包
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("" + 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();
}
}
}
如何用Java来编写一个音乐播放器
首先要在环境电脑中安装下JMF环境，才能引入javax.sound.sampled.*这个包，一下是用过的代码
package TheMusic;
import java.io.*;
import javax.sound.sampled.*;
public class Music {
public static void main(String[] args) {
// TODO Auto-generated method stub
//修改你的音乐文件路径就OK了
AePlayWave apw=new AePlayWave("突然好想你.wav");
apw.start();
}
}
在程序中实例化这个类，启动线程，实例化的时候参照Test修改路径就OK播放声音的类
public class AePlayWave extends Thread {
private String filename;
public AePlayWave(String wavfile) {
filename = wavfile;
}
public void run() {
File soundFile = new File(filename);
AudioInputStream audioInputStream = null;
try {
audioInputStream = AudioSystem.getAudioInputStream(soundFile);
} catch (Exception e1) {
e1.printStackTrace();
return;
}
AudioFormat format = audioInputStream.getFormat();
SourceDataLine auline = null;
DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
try {
auline = (SourceDataLine) AudioSystem.getLine(info);
auline.open(format);
} catch (Exception e) {
e.printStackTrace();
return;
}
auline.start();
int nBytesRead = 0;
byte[] abData = new byte[512];
try {
while (nBytesRead != -1) {
nBytesRead = audioInputStream.read(abData, 0, abData.length);
if (nBytesRead >= 0)
auline.write(abData, 0, nBytesRead);
}
} catch (IOException e) {
e.printStackTrace();
return;
} finally {
auline.drain();
auline.close();
}
}
}
