Java简单MP3播放器

MusicPlayer类

package com.play;

import java.awt.BorderLayout;

import java.awt.FileDialog;

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 java.io.File;

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;

import javax.swing.JFrame;

public class MusicPlayer extends JFrame {

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

boolean isStop = true; //控制播放线程

boolean hasStop = true; //播放线程状态

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音乐播放器");

setSize(350, 370);

//建立菜单栏

MenuBar menubar = new MenuBar();

Menu menufile = new Menu("文件");

MenuItem menuopen = new MenuItem("打开", new MenuShortcut(KeyEvent.VK_O)) ; //new MenuItem("打 开 ", 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); //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(); //"F:\\DJ Music\\(DJ)不想起床[1].mp3";//list.getSelectedItem();

play();

}

}

});

add(list, "Center");

//信息显示

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

labelfilepath = new Label("播放目录：");

labelfilename = new Label("播放文件：");

panel.add(labelfilepath);

panel.add(labelfilename);

add(panel, "North");

//注册窗体关闭事件

addWindowStateListener(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("播放目录：" + 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("开始播放：" + filename.toString());

while (!hasStop) {

try {

Thread.sleep(10);

} catch (Exception e) {

}

}

File file = new File(filepath + filename);

labelfilename.setText("播放文件：" + filename);

//取得文件输入流

audioInputStream = AudioSystem.getAudioInputStream(file);

if(audioInputStream!=null){

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);

if(null== sourceDataLine){

sourceDataLine.open(audioFormat);

sourceDataLine.start();

}else{

sourceDataLine.stop();

sourceDataLine.drain();

sourceDataLine.open(audioFormat);

sourceDataLine.start();

}

//创建独立线程进行播放

isStop = false;

PlayThread playThread=new PlayThread(audioInputStream,sourceDataLine);

Thread thread = new Thread(playThread);

playThread.start();

} catch (Exception e) {

e.printStackTrace();

}

}

public static void main(String args[]) {

new MusicPlayer();

}

}

///////////////////////////////////////////////////////////////////////////////////////////////////////

PlayThread类

package com.play;

import javax.sound.sampled.AudioInputStream;

import javax.sound.sampled.SourceDataLine;

public class PlayThread extends Thread {

byte tempBuffer[] = new byte[320];

boolean isStop;

AudioInputStream audioInputStream;

SourceDataLine sourceDataLine;

public PlayThread(AudioInputStream audioInputStream,SourceDataLine sourceDataLine){

this.audioInputStream=audioInputStream;

this.sourceDataLine=sourceDataLine;

}

public void run() {

try {

int cnt=0;

boolean hasStop = false;

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);

}

}

}