音频文件在Eclipse IDE中播放;但不是JAR文件

问题描述

Addingclip.drain() after clip.start() seems to have worked okay for me (IDE and command line both with and without &)

import java.io.IOException;
import java.net.URL;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;

public class SandBox {

    public static void main(String[] args)  {
        try {
            URL url = SandBox.class.getResource("/sound-effects/Loud-alarm-clock-sound.wav");
            AudioInputStream ais = AudioSystem.getAudioInputStream(url);
            AudioFormat af = ais.getFormat();
            DataLine.Info info = new DataLine.Info(Clip.class, af);

            Clip clip = (Clip) AudioSystem.getLine(info);
            clip.open(ais);
            clip.start();
            System.out.println("Drain...");
            clip.drain();
            System.out.println("...Drained");
        } catch (UnsupportedAudioFileException | IOException | LineUnavailableException exp) {
            exp.printstacktrace();
        }
    }

}

Now, having said that, I have found drain a little unreliable in the past, especially when there are multiple sounds playing in which case I tend to use a LineListener

For example…

import java.io.IOException;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineEvent;
import javax.sound.sampled.LineListener;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;

public class SandBox {

    protected static final Object LOCK = new Object();

    public static void main(String[] args) {
        try {
            URL url = SandBox.class.getResource("/sound-effects/Loud-alarm-clock-sound.wav");
            AudioInputStream ais = AudioSystem.getAudioInputStream(url);
            AudioFormat af = ais.getFormat();
            DataLine.Info info = new DataLine.Info(Clip.class, af);

            Clip clip = (Clip) AudioSystem.getLine(info);
            clip.open(ais);

            clip.addLineListener(new LineListener() {
                @Override
                public void update(LineEvent event) {
                    System.out.println(event.getType());
                    if (event.getType() == LineEvent.Type.STOP) {
                        synchronized (LOCK) {
                            LOCK.notify();
                        }
                    }
                }
            });
            clip.start();

            synchronized (LOCK) {
                LOCK.wait();
            }
        } catch (UnsupportedAudioFileException | IOException | LineUnavailableException | InterruptedException exp) {
            exp.printstacktrace();
        }
    }

}

解决方法

我正在使用的音频文件位于以下位置:http :
//www.orangefreesounds.com/loud-alarm-clock-sound/

这是我在Eclipse IDE中的文件结构: 我的文件结构是什么样的

当我在IDE中运行该音频文件时,它的播放效果非常好,但是当
将其导出为JAR文件时,该文件却不能正常播放。我已经检查并发现音频文件
在JAR文件中。

我正在使用终端命令java -jar Sandbox.jar &来运行JAR文件。
该程序似乎能够找到该文件(因为它没有抛出
IOException),但是似乎无法执行播放。

为什么会发生此问题,我该如何解决?

奇怪的更新
好的,实际上,在Windows 8.1
cmd或PowerShellWindows 8.1上运行时,JAR文件能够播放音频文件,但
由于某些原因,无法在Ubuntu 14.04终端中运行。一直以来,我一直在尝试在
Ubuntu 14.04中运行JAR文件。

奇怪的更新#2
我已经确认JAR文件仅在Windows 8.1
系统上起作用的问题。这个问题中的两个代码段都
不起作用,而MadProgrammer的两个解决方案都可以工作。

最小,完整和可验证的示例(不适用于Windows或
Ubuntu)

import java.io.IOException;
import java.net.URL;
import javax.sound.sampled.*;

public class Sandbox
{

    public static void main(String[] args) throws UnsupportedAudioFileException,IOException,LineUnavailableException
    {
        URL url = Sandbox.class.getResource("/sound-effects/alarmSoundClip.wav");
        AudioInputStream ais = AudioSystem.getAudioInputStream(url);
        AudioFormat af = ais.getFormat();
        DataLine.Info info = new DataLine.Info(Clip.class,af);

        Clip clip = (Clip) AudioSystem.getLine(info);
        clip.open(ais);
        clip.start();
    }

}

尝试的解决方案1(在Windows或Ubuntu上不起作用)

一种尝试的解决方案(如Andrew Thompson所建议)是
this.getClass().getResource( ... )代替Sandbox.class.getResource(…)

import java.io.IOException;
import java.net.URL;

import javax.sound.sampled.*;

public class Sandbox
{

    public static void main(String[] args) throws UnsupportedAudioFileException,LineUnavailableException
    {
        new Sandbox();
    }

    public Sandbox() throws UnsupportedAudioFileException,LineUnavailableException
    {
        URL url = this.getClass().getResource("/sound-effects/alarmSoundClip.wav");
        AudioInputStream ais = AudioSystem.getAudioInputStream(url);
        AudioFormat af = ais.getFormat();
        DataLine.Info info = new DataLine.Info(Clip.class,af);

        Clip clip = (Clip) AudioSystem.getLine(info);
        clip.open(ais);
        clip.start();
    }
}