java简易音乐播放器

f58421475 贡献于2012-12-29

作者 Administrator  创建于2010-12-19 13:54:39   修改者  修改于1899-12-30 00:00:00字数3908

文档摘要:java简易音乐播放器
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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 = 1L; 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("D哥音乐播放器"); 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)); 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("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 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("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); while (!hasStop) { System.out.print("."); try { Thread.sleep(10); } catch (Exception e) { } } System.out.println(""); File file = new File(filepath + filename); labelfilename.setText("播放文件:" + 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(); } } public static void main(String args[]) { new MusicPlayer(); } // 播放线程 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); } } } }

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