用java写一个简单的音乐播放器（二）

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用java写一个简单的音乐播放器（二）

2024-01-18 05:02| 来源: 网络整理| 查看: 265

前言

之前的版本，有位朋友说无法实现暂停播放，还有一些其他无伤大雅的bug，所以我就查了一波资料，研究了一下后，进行的一波优化。这个版本的播放器，实现了：上一首、下一首、暂停/播放、目录浏览等功能。

注意

需要注意的是几个jar包的变化，旧的jar包会导致一些异常，例如：Resetting to invalid mark等，所以做了有一些改变，当然jl1.0.1不要应该也行：在这里插入图片描述

代码

手写是MyPlayer类里面的变化，为了方便我直接写成了MyPlayer2；其中不再使用jl中player的play方法，而是改用JavaSound中的方法类实现。代码结构：在这里插入图片描述 MyPlayer2实现

package com.lyrics.musicplayer.service; import java.io.File; import java.io.IOException; import javax.sound.sampled.AudioFormat; import javax.sound.sampled.AudioInputStream; import javax.sound.sampled.AudioSystem; import javax.sound.sampled.DataLine; import javax.sound.sampled.LineUnavailableException; import javax.sound.sampled.SourceDataLine; import javax.sound.sampled.UnsupportedAudioFileException; public class MyPlayer2 extends Thread{ Object lock = new Object(); AudioInputStream stream; SourceDataLine sourceDataLine; public static boolean paused = false; private String music; public MyPlayer2(String music) { this.music = music; } public void setPaused(boolean paused) { MyPlayer2.paused = paused; } public void run() { try { play(music); } catch (IOException | UnsupportedAudioFileException | LineUnavailableException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public void play(String music) throws IOException, UnsupportedAudioFileException, LineUnavailableException { stream = AudioSystem.getAudioInputStream(new File(music)); AudioFormat format = stream.getFormat(); if (format.getEncoding() != AudioFormat.Encoding.PCM_SIGNED) { format = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, format.getSampleRate(), 16, format.getChannels(), format.getChannels() * 2, format.getSampleRate(), false); stream = AudioSystem.getAudioInputStream(format, stream); } DataLine.Info info = new DataLine.Info(SourceDataLine.class, stream.getFormat()); sourceDataLine = (SourceDataLine) AudioSystem.getLine(info); sourceDataLine.open(stream.getFormat(), sourceDataLine.getBufferSize()); sourceDataLine.start(); int numRead = 0; byte[] buf = new byte[sourceDataLine.getBufferSize()]; while ((numRead = stream.read(buf, 0, buf.length)) >= 0) { while(paused) { if(sourceDataLine.isRunning()) { sourceDataLine.stop(); } else { sourceDataLine.start(); } } int offset = 0; while (offset if(sourceDataLine != null) { sourceDataLine.close(); } if(stream != null) { try { stream.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } public void on() { setPaused(false); } public void pause() { setPaused(true); } }

Design实现

package com.lyrics.musicplayer.ui; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.DirectoryDialog; import java.util.Vector; import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Text; import com.lyrics.musicplayer.service.MyPlayer2; import com.lyrics.musicplayer.util.FileList; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.widgets.List; import org.eclipse.swt.events.MouseAdapter; import org.eclipse.swt.events.MouseEvent; import org.eclipse.swt.widgets.Label; public class Design { protected Shell shell; private Text textBrowser; String selecteddir=null; String programdir=null; String music; int index = 0; MyPlayer2 myplayer; /** * Open the window. */ public void open() { Display display = Display.getDefault(); createContents(); shell.open(); shell.layout(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) { display.sleep(); } } myplayer.close(); } /** * Create contents of the window. * @wbp.parser.entryPoint */ protected void createContents() { shell = new Shell(); shell.setSize(358, 335); shell.setText("Music Player"); Button btnPlayer = new Button(shell, SWT.NONE); btnPlayer.setText("播放"); btnPlayer.setBounds(138, 45, 80, 27); List listDisplay = new List(shell, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL); listDisplay.setBounds(10, 138, 322, 149); Button btnPrevMusic = new Button(shell, SWT.NONE); btnPrevMusic.setBounds(22, 45, 80, 27); btnPrevMusic.setText("上一首"); Button btnNextMusic = new Button(shell, SWT.NONE); btnNextMusic.setText("下一首"); btnNextMusic.setBounds(252, 45, 80, 27); textBrowser = new Text(shell, SWT.BORDER); textBrowser.setBounds(10, 93, 229, 23); Button btnBrowser = new Button(shell, SWT.NONE); btnBrowser.setBounds(252, 91, 80, 27); btnBrowser.setText("浏览"); Label label = new Label(shell, SWT.NONE); label.setBounds(22, 10, 61, 17); label.setText("正在播放："); Label lblName = new Label(shell, SWT.NONE); lblName.setBounds(86, 10, 246, 17); // 播放暂停键 btnPlayer.addMouseListener(new MouseAdapter() { @Override public void mouseDown(MouseEvent e) { if(!MyPlayer2.paused) { btnPlayer.setText("播放"); myplayer.pause(); return; } if(MyPlayer2.paused){ //thread.run(); btnPlayer.setText("暂停"); myplayer.on(); } } }); // 双击列表播放 listDisplay.addMouseListener(new MouseAdapter() { @Override public void mouseDoubleClick(MouseEvent e) { index = listDisplay.getSelectionIndex(); lblName.setText(listDisplay.getItem(index)); btnPlayer.setText("暂停"); music=selecteddir + "/" +listDisplay.getItem(index); myplayer = new MyPlayer2( music); myplayer.on(); myplayer.start(); } } ); // 文件夹选择 btnBrowser.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { //新建文件夹（目录）对话框 DirectoryDialog folderdlg=new DirectoryDialog(shell); //设置文件对话框的标题 folderdlg.setText("文件选择"); //设置初始路径 folderdlg.setFilterPath("SystemDrive"); //设置对话框提示文本信息 folderdlg.setMessage("请选择相应的文件夹"); //打开文件对话框，返回选中文件夹目录 selecteddir=folderdlg.open(); if(selecteddir==null){ return ; } else{ textBrowser.setText(selecteddir); programdir=System.getProperty("user.dir"); try { FileList fileList= new FileList(); Vector list=new Vector (); fileList.getAllFileName(selecteddir, list); for(int i=0;i // TODO Auto-generated catch block e1.printStackTrace(); } } } }); // 上一首 btnPrevMusic.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { index = index-1; listDisplay.setSelection(index); btnPlayer.setText("暂停"); lblName.setText(listDisplay.getItem(index)); myplayer.close(); music= selecteddir + "/" + listDisplay.getItem(index); myplayer = new MyPlayer2( music); myplayer.on(); myplayer.start(); } }); // 下一首 btnNextMusic.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { index = index+1; listDisplay.setSelection(index); btnPlayer.setText("暂停"); lblName.setText(listDisplay.getItem(index)); myplayer.close(); music = selecteddir + "/" + listDisplay.getItem(index); myplayer = new MyPlayer2( music); myplayer.on(); myplayer.start(); } }); } }

FileList实现

package com.lyrics.musicplayer.util; import java.io.File; import java.util.Vector; public class FileList { public void getAllFileName(String path,Vector list) { File file = new File(path); File[] tempList = file.listFiles(); for (int i = 0; i list.add(tempList[i].getName()); } if (tempList[i].isDirectory()) { getAllFileName(tempList[i].getAbsolutePath(),list); } } return; } }

启动：MusicPlayer实现

package com.lyrics.musicplayer; import com.lyrics.musicplayer.ui.Design; /** * @Author: lyrics * @ClassName: MusicPlayer * @Date: 2020/05/17 * @Copyright: lyrics */ public class MusicPlayer { public static void main(String[] args) { try { Design window = new Design(); window.open(); } catch (Exception e) { e.printStackTrace(); } } } 运行结果

在这里插入图片描述

写在最后

针对之前有位朋友提到的问题我都一一实现或者解决了，但是这个代码毕竟只是随意之作，肯定有很多不足的地方，如果接下来我不是很忙的话，我会继续更新优化，当然也有可能是有生之年系列。

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用java写一个简单的音乐播放器（二）

用java写一个简单的音乐播放器（二）

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