java实现音乐播放器（调整显示音量大小、调整进度、图片切换）

上学期老师布置了一个音乐播放器的作业，自己独立写的界面感觉还行就传上来了。

package Music;

import javax.sound.sampled.*;
import java.io.*;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Timer;
import java.util.TimerTask;

import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.JSlider;
import javax.swing.border.Border;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class Musicrun {
	JFrame frame = new JFrame("音乐播放器");

	JPanel p1 = new JPanel();
	JPanel p2 = new JPanel();
	JPanel p3 = new JPanel();

	Border etched = BorderFactory.createEtchedBorder();
	Border border = BorderFactory.createTitledBorder(etched, "");

	JButton jButton1 = new JButton("Start");
	JButton jButton2 = new JButton("Stop");
	JButton jButton3 = new JButton("Continue");

	boolean bofang = false;

	JLabel yinliang = new JLabel();
	JLabel musicImage = new JLabel();

	float ylforce = 0;

	double atime = 0;
	double bftime = 0;

	public String musicPath = "D:\\zuoye\\java\\resource\\test.wav";
	public AudioPlayer music = null;

	JSlider slider1 = new JSlider();

	JProgressBar progressBar = new JProgressBar();

	ImageIcon icon[] = { new ImageIcon("D:\\zuoye\\java\\resource\\b1.png"),
			new ImageIcon("D:\\zuoye\\java\\resource\\b2.png"),
			new ImageIcon("D:\\zuoye\\java\\resource\\b3.png"),
			new ImageIcon("D:\\zuoye\\java\\resource\\b4.png"),
			new ImageIcon("D:\\zuoye\\java\\resource\\b5.png") };

	public Musicrun() {
		frame.setSize(800, 800);
		frame.setLayout(new GridLayout(3, 1));

		border = BorderFactory.createTitledBorder("播放进度");
		p2.setBorder(border);

		border = BorderFactory.createTitledBorder("音量控制");
		p3.setBorder(border);

		init();

		frame.getContentPane().add(p1);
		frame.getContentPane().add(p2);
		frame.getContentPane().add(p3);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);

	}

	private void init() {
		// p1部分
		musicImage.setIcon(icon[0]);
		p1.add(musicImage);

		Timer timer = new Timer();
		// timer.schedule(new MusicTask(), 500,1000);
		timer.schedule(new MusicTask(), 500, 2000);

		// p2部分
		music = new AudioPlayer(musicPath);

		progressBar.setMaximum(100);
		progressBar.setMinimum(0);
		progressBar.setStringPainted(true);
		progressBar.setIndeterminate(false);
		progressBar.setPreferredSize(new Dimension(780, 30));
		;
		;
		p2.add(progressBar);

		Timer timer2 = new Timer();
		timer2.schedule(new MusicTask2(), 0, 100);

		jButton1.setSize(80, 40);
		jButton2.setSize(80, 40);
		jButton3.setSize(80, 40);
		p2.add(jButton1);
		p2.add(jButton2);
		p2.add(jButton3);
		jButton1.addActionListener(new ButtonHandler());
		jButton2.addActionListener(new ButtonHandler1());
		jButton3.addActionListener(new ButtonHandler2());

		// p3部分
		yinliang.setText("当前音量为：" + slider1.getValue());
		// yinliang.setBounds(0,630,100,20);
		p3.setLayout(new BorderLayout());
		p3.add(yinliang, BorderLayout.WEST);

		slider1.setValue(100);
		slider1.setPaintTicks(true);// setPaintTicks()方法是设置是否在JSlider加上刻度，若为true则下面两行才有作用。
		slider1.setMajorTickSpacing(20);
		slider1.setMinorTickSpacing(5);
		slider1.setPaintLabels(true);// setPaintLabels()方法为设置是否数字标记，若设为true，则JSlider刻度上就会有数值出现。
		slider1.setPaintTrack(true);// setPaintTrack()方法表示是否出现滑动杆的横杆。默认值为true.
		slider1.setSnapToTicks(true);// setSnapToTicks()方法表示一次移动一个小刻度，而不再是一次移动一个单位刻度。
		// JLabel label1 = new JLabel("目前刻度：" + );
		slider1.addChangeListener(new ChangeListener() {

			@Override
			public void stateChanged(ChangeEvent e) {
				yinliang.setText("当前音量：" + slider1.getValue());
				ylforce = (float) ((0.86) * slider1.getValue() - 80);
				music.setVol(ylforce);

			}
		});
		p3.add(slider1, BorderLayout.SOUTH);

	}

	public class MusicTask extends TimerTask {
		// TODO 自动生成的方法存根
		int i = 0;

		@Override
		public void run() {
			musicImage.setIcon(icon[i]);
			i++;
			if (i == 5) {
				i = 0;
			}
		}
	}

	public class MusicTask2 extends TimerTask {
		// TODO 自动生成的方法存根
		// double progressValues;
		int progressBarValues;

		@Override
		public void run() {

			if (bofang == true) {
				bftime += 0.1;
				progressBarValues = (int) ((bftime / atime) * 100);
				progressBar.setValue(progressBarValues);
			}
		}
	}

	private class ButtonHandler implements ActionListener {
		@Override
		public void actionPerformed(ActionEvent e) {
			if (bofang == false) {
				bofang = true;
				bftime = 0;
				music.start(bofang);

			} else {
				music.start(bofang);
			}
		}
	}

	private class ButtonHandler1 implements ActionListener {
		@Override
		public void actionPerformed(ActionEvent e) {
			if (bofang == true) {
				bofang = false;
				music.stop();
			} else {
				music.stop();
			}
		}
	}

	private class ButtonHandler2 implements ActionListener {
		@Override
		public void actionPerformed(ActionEvent e) {
			if (bofang == false) {
				bofang = true;
				music.continues();
			} else {
				music.continues();
			}
		}
	}

	public class AudioPlayer {
		private String musicPath; // 音频文件
		private volatile boolean run = true; // 记录音频是否播放
		private Thread mainThread; // 播放音频的任务线程
		private float newVolumn = 7;

		private AudioInputStream audioStream;
		private AudioFormat audioFormat;
		private SourceDataLine sourceDataLine;

		public AudioPlayer(String musicPath) {
			this.musicPath = musicPath;
			prefetch();
		}

		// 数据准备
		private void prefetch() {
			try {
				// 获取音频输入流
				audioStream = AudioSystem.getAudioInputStream(new File(musicPath));
				// 获取音频的编码对象
				audioFormat = audioStream.getFormat();
				// 包装音频信息
				DataLine.Info dataLineInfo = new DataLine.Info(SourceDataLine.class, audioFormat,
						AudioSystem.NOT_SPECIFIED);
				// 使用包装音频信息后的Info类创建源数据行，充当混频器的源
				sourceDataLine = (SourceDataLine) AudioSystem.getLine(dataLineInfo);
				// 获得音频的总时长
				atime = audioStream.getFrameLength() / audioFormat.getSampleRate();

				sourceDataLine.open(audioFormat);
				sourceDataLine.start();

			} catch (UnsupportedAudioFileException ex) {
				ex.printStackTrace();
			} catch (LineUnavailableException ex) {
				ex.printStackTrace();
			} catch (IOException ex) {
				ex.printStackTrace();
			}

		}

		// 析构函数:关闭音频读取流和数据行
		protected void finalize() throws Throwable {
			super.finalize();
			sourceDataLine.drain();
			sourceDataLine.close();
			audioStream.close();
		}

		// 播放音频:通过loop参数设置是否循环播放
		private void playMusic(boolean loop) throws InterruptedException {

			try {
				if (loop) {
					while (true) {
						playMusic();
						bftime = 0;
					}
				} else {
					playMusic();
					// 清空数据行并关闭
					sourceDataLine.drain();
					sourceDataLine.close();
					audioStream.close();
				}

			} catch (IOException ex) {
				ex.printStackTrace();
			}

		}

		private void playMusic() {
			try {
				synchronized (this) {
					run = true;
				}
				// 通过数据行读取音频数据流，发送到混音器;
				// 数据流传输过程：AudioInputStream -> SourceDataLine;
				audioStream = AudioSystem.getAudioInputStream(new File(musicPath));
				int count;
				byte tempBuff[] = new byte[1024];

				while ((count = audioStream.read(tempBuff, 0, tempBuff.length)) != -1) {
					synchronized (this) {
						while (!run)
							wait();
					}
					sourceDataLine.write(tempBuff, 0, count);
				}

			} catch (UnsupportedAudioFileException ex) {
				ex.printStackTrace();
			} catch (IOException ex) {
				ex.printStackTrace();
			} catch (InterruptedException ex) {
				ex.printStackTrace();
			}
		}

		// 暂停播放音频
		private void stopMusic() {
			synchronized (this) {
				run = false;
				notifyAll();
			}
		}

		// 继续播放音乐
		private void continueMusic() {
			synchronized (this) {
				run = true;
				notifyAll();
			}
		}

		// 外部调用控制方法:生成音频主线程；
		public void start(boolean loop) {
			mainThread = new Thread(new Runnable() {
				public void run() {
					try {
						playMusic(loop);
					} catch (InterruptedException e) {
						e.printStackTrace();
					}
				}
			});
			mainThread.start();
		}

		// 外部调用控制方法：暂停音频线程
		public void stop() {
			new Thread(new Runnable() {
				public void run() {
					stopMusic();
				}
			}).start();
		}

		// 外部调用控制方法：继续音频线程
		public void continues() {
			new Thread(new Runnable() {
				public void run() {
					continueMusic();
				}
			}).start();
		}

		// 播放器的状态
		public boolean isPlaying() {
			return run;
		}

		// 设置音频音量
		// https://zhidao.baidu.com/question/269020584.html
		public void setVol(float value) {
			newVolumn = value;
			// 必须open之后
			if (newVolumn != 7) {
				FloatControl control = (FloatControl) sourceDataLine.getControl(FloatControl.Type.MASTER_GAIN);
				// System.out.println(control.getMaximum());
				// System.out.println(control.getMinimum());
				control.setValue(newVolumn);
			}
		}

		// 销毁
		public void destroy() {
			try {
				finalize();
			} catch (Throwable e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

}

然后底下是主函数

package Music;

public class JavaMain {

	public static void main(String[] args) {
		// TODO 自动生成的方法存根
		new Musicrun();
	}

}

关于进度条进度的问题，可以利用计时器统计当前已经播放的时间。然后利用函数计算音乐播放的总时间。两者相除就能得出当前的进度了。文章来源地址https://www.toymoban.com/news/detail-517718.html

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