java播放mp3音樂

① java如何實現播放mp3

簡單的實例，代碼如下，純粹JMF載入MP3並播放：
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("播放器為空");
return;
}

first = false;
player.addControllerListener(this);
// 提取媒體內容
player.prefetch();

}

public void controllerUpdate(ControllerEvent e) {
// 當媒體播放結束時,循環播放
if (e instanceof EndOfMediaEvent) {
mp3NO++;
if(mp3NO<this.mp3List.size()){
this.start();
}
return;
}

// 當預提取媒體的內容結束
if (e instanceof PrefetchCompleteEvent) {
player.start();
return;
}
// 當實例化後
if (e instanceof RealizeCompleteEvent) {
// pack(); //執行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();
}
}

② java大神求解啊，如何用java編寫一個音樂播放器，然後播放器裡面的歌可以順序播放的。

參考代碼如下
首先下載播放mp3的包，比如mp3spi1.9.4.jar。在工程中添加這個包。
播放器演示代碼如下
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;// 控制播放線程
boolean hasStop = true;// 播放線程狀態

String filepath;// 播放文件目錄
String filename;// 播放文件名稱
AudioInputStream audioInputStream;// 文件流
AudioFormat audioFormat;// 文件格式
SourceDataLine sourceDataLine;// 輸出設備

List list;// 文件列表
Label labelfilepath;//播放目錄顯示標簽
Label labelfilename;//播放文件顯示標簽

public MusicPlayer() {
// 設置窗體屬性
setLayout(new BorderLayout());
setTitle("MP3 Music Player");
setSize(350, 370);

// 建立菜單欄
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) {
// 雙擊時處理
if (e.getClickCount() == 2) {
// 播放選中的文件
filename = list.getSelectedItem();
play();
}
}
});
add(list, "Center");

// 信息顯示
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");

// 注冊窗體關閉事件
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
setVisible(true);
}

// 打開
private void open() {
FileDialog dialog = new FileDialog(this, "Open", 0);
dialog.setVisible(true);
filepath = dialog.getDirectory();
if (filepath != null) {
labelfilepath.setText("Dir：" + filepath);

// 顯示文件列表
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;// 停止播放線程
// 等待播放線程停止
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);

// 取得文件輸入流
audioInputStream = AudioSystem.getAudioInputStream(file);
audioFormat = audioInputStream.getFormat();
// 轉換mp3文件編碼
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);
}

// 打開輸出設備
DataLine.Info dataLineInfo = new DataLine.Info(
SourceDataLine.class, audioFormat,
AudioSystem.NOT_SPECIFIED);
sourceDataLine = (SourceDataLine) AudioSystem.getLine(dataLineInfo);
sourceDataLine.open(audioFormat);
sourceDataLine.start();

// 創建獨立線程進行播放
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;
// 讀取數據到緩存數據
while ((cnt = audioInputStream.read(tempBuffer, 0,
tempBuffer.length)) != -1) {
if (isStop)
break;
if (cnt > 0) {
// 寫入緩存數據
sourceDataLine.write(tempBuffer, 0, cnt);
}
}
// Block等待臨時數據被輸出為空
sourceDataLine.drain();
sourceDataLine.close();
hasStop = true;
} catch (Exception e) {
e.printStackTrace();
System.exit(0);
}
}
}

public static void main(String args[]) {
new MusicPlayer();
}
}