[Java] Realize the play, stop, loop play and volume adjustment of wav format music

Preface

Recently, the school invited Dane’s teacher to give us a basic Java training course. After the training, choose topics in groups and play mini games. Our group chose Bubble Hall. After nearly 5 days of collaborative coding in the group, it was almost finished. Later, I will also extract some of the gains and summarize them on the blog.

During the period, I was in charge of game sound effects and BGM work. After searching for information on the Internet, I wrote a simple music player class to meet our game needs. This tool class does not call other third-party jar packages, but uses the JDK low-level API. Only music files in wav format are supported.

Code

MusicPlayer.java

package com.tedu.manager;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Scanner;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Control;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.UnsupportedAudioFileException;

/**
 * 根据jdk底层API实现的音乐播放器
 * 
 * @功能
 * 1、只支持wav，且只能播放一首
 * 2、可循环播放，随时停止（并非暂停）
 * 3、支持一定范围内的音量调节
 * 
 * 参考博客:
 * https://blog.csdn.net/qq_21907023/article/details/96174077
 * https://blog.csdn.net/fuckcdn/article/details/83725725
 * 
 * @author passerbyYSQ
 * @create 2020年7月20日 下午4:05:50
 */
public class MusicPlayer {
//	private AudioInputStream audioIn;
//	private SourceDataLine sourceDataLine;
	// wav文件的路径
	private File file;
	// 是否循环播放
	private boolean isLoop = false;
	// 是否正在播放
	private boolean isPlaying;
	// FloatControl.Type.MASTER_GAIN的值(可用于调节音量)
	private float newVolumn = 7;
	
	private PlayThread playThread;
	
//	public static void main(String[] args) {
//		try {
			MusicPlayer player = new MusicPlayer("F:\\初级软件实训\\音效\\爆炸.wav");放泡泡.mp3
			MusicPlayer player = new MusicPlayer("F:\\初级软件实训\\音效\\放泡泡.mp3");
//			MusicPlayer player = new MusicPlayer("F:\\初级软件实训\\CrazyArcade-master\\music\\bgm0.wav");
//			player.setVolumn(6f).play();
//			System.out.println("开始播放");
//			
//			System.out.println("是否暂停？");
//			Scanner sc = new Scanner(System.in);
//			int isOver = sc.nextInt();
//			if (isOver == 1) {
//				player.over();
//			}
//			
//		} catch (Exception e) {
//			e.printStackTrace();
//		}
//	}
	
	public MusicPlayer(String srcPath) {
		file = new File(srcPath);
	}
	
	/**
	 * 播放音乐
	 */
	public void play() {
		playThread = new PlayThread();
		playThread.start();
	}
	
	/**
	 * 结束音乐（并非暂停）
	 */
	public void over() {
		isPlaying = false;
		if (playThread != null) {
			playThread = null;
		}
	}
	
	/**
	 * 设置循环播放
	 * @param isLoop
	 * @return	返回当前对象
	 */
	public MusicPlayer setLoop(boolean isLoop) {
		this.isLoop = isLoop;
		return this;
	}
	
	/**
	 * -80.0~6.0206测试,越小音量越小
	 * @param newVolumn
	 * @return	返回当前对象
	 */
	public MusicPlayer setVolumn(float newVolumn) {
		this.newVolumn = newVolumn;
		return this;
	}
	
	/**
	 * 异步播放线程
	 */
	private class PlayThread extends Thread {
	
		@Override
		public void run() {
			isPlaying = true;
			do {
//				isPlaying = true;
				
				SourceDataLine sourceDataLine = null;
				BufferedInputStream bufIn = null;
				AudioInputStream audioIn = null;
				try {
					bufIn = new BufferedInputStream(new FileInputStream(file));
					audioIn = AudioSystem.getAudioInputStream(bufIn); // 可直接传入file
					
					AudioFormat format = audioIn.getFormat();
					sourceDataLine = AudioSystem.getSourceDataLine(format);
					sourceDataLine.open();
					// 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);
					}
					
					sourceDataLine.start();
					byte[] buf = new byte[512];
//					System.out.println(audioIn.available());
					int len = -1;
					while (isPlaying && (len = audioIn.read(buf)) != -1) {
						sourceDataLine.write(buf, 0, len);
					}
					
				} catch (Exception e) {
					e.printStackTrace();
				} finally {
					
					if (sourceDataLine != null) {
						sourceDataLine.drain(); 
						sourceDataLine.close();
					}
					try {
						if (bufIn != null) {
							bufIn.close();
						}
						if (audioIn != null) {
							audioIn.close();
						}
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
			} while (isPlaying && isLoop);
		}
	}
	
	
}