在 Java 中播放声音文件

Question

我正在开发一个包含音乐组件的程序。基本上，当按下某些按钮时，我想播放特定的歌曲文件。我一直在研究用 Java 播放声音，但对我来说还没有任何效果。我目前正在玩一些我在教程中找到的代码，但是我不确定如何指定文件。

我不断收到FileNotFoundExecption，所以我显然错误地引用了该文件。我的桌面上有.wav 文件，我的项目的资源源文件夹中也有它。部分代码如下，关于我如何引用文件的任何想法？

public static void main(String[] args) throws Exception {

    // specify the sound to play
    // (assuming the sound can be played by the audio system)
    File soundFile = new File("/desktop/14_Wonderland.wav");
    AudioInputStream sound = AudioSystem.getAudioInputStream(soundFile);

    // load the sound into memory (a Clip)
    DataLine.Info info = new DataLine.Info(Clip.class, sound.getFormat());
    Clip clip = (Clip) AudioSystem.getLine(info);
    clip.open(sound);

    // due to bug in Java Sound, explicitly exit the VM when
    // the sound has stopped.
    clip.addLineListener(new LineListener() {
        public void update(LineEvent event) {
            if (event.getType() == LineEvent.Type.STOP) {
                event.getLine().close();
                System.exit(0);
            }
        }
    });

    // play the sound clip
    clip.start();
}

Answer 1

如果由于某种原因您在查找文件时遇到问题，我知道这在大多数情况下并不理想，但您可以尝试使用 JFileChooser（我链接了一个示例）。

由此，您可以只使用找到的文件，也可以输出所选文件的位置，以便了解如何为文件路径建模。我希望这会有所帮助！

编码愉快！如果您有任何问题，请发表评论。

Answer 2

如果您不介意在播放声音时打开默认音乐应用程序， 你可以这样做： 对于 Mac OS X：Desktop.open(FilePath); 对于 Windows：Runtime.exec(FilePath);

Answer 3

我知道它不能回答您关于文件异常的问题（其他人已经回答了），但您可以使用此代码播放声音（您可能需要稍微玩一下以满足您的需要）：

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.Clip;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;

public class PlaySound {
    private static boolean tryToInterruptSound = false;
    private static long mainTimeOut = 3000;
    private static long startTime = System.currentTimeMillis();

    public static synchronized Thread playSound(final File file) {

        Thread soundThread = new Thread() {
            @Override
            public void run() {
                try{
                    Clip clip = null;
                    AudioInputStream inputStream = null;
                    clip = AudioSystem.getClip();
                    inputStream = AudioSystem.getAudioInputStream(file);
                    AudioFormat format = inputStream.getFormat();
                    long audioFileLength = file.length();
                    int frameSize = format.getFrameSize();
                    float frameRate = format.getFrameRate();
                    long durationInMiliSeconds = 
                            (long) (((float)audioFileLength / (frameSize * frameRate)) * 1000);

                    clip.open(inputStream);
                    clip.start();
                    System.out.println("" + (System.currentTimeMillis() - startTime) + ": sound started playing!");
                    Thread.sleep(durationInMiliSeconds);
                    while (true) {
                        if (!clip.isActive()) {
                            System.out.println("" + (System.currentTimeMillis() - startTime) + ": sound got to it's end!");
                            break;
                        }
                        long fPos = (long)(clip.getMicrosecondPosition() / 1000);
                        long left = durationInMiliSeconds - fPos;
                        System.out.println("" + (System.currentTimeMillis() - startTime) + ": time left: " + left);
                        if (left > 0) Thread.sleep(left);
                    }
                    clip.stop();  
                    System.out.println("" + (System.currentTimeMillis() - startTime) + ": sound stoped");
                    clip.close();
                    inputStream.close();
                } catch (LineUnavailableException e) {
                    e.printStackTrace();
                } catch (UnsupportedAudioFileException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                } catch (InterruptedException e) {
                    System.out.println("" + (System.currentTimeMillis() - startTime) + ": sound interrupted while playing.");
                }
            }
        };
        soundThread.setDaemon(true);
        soundThread.start();
        return soundThread;
    }

    public static void main(String[] args) {
        Thread soundThread = playSound(new File("C:\\Booboo.wav"));
        System.out.println("" + (System.currentTimeMillis() - startTime) + ": playSound returned, keep running the code");
        try {   
            Thread.sleep(mainTimeOut );
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        if (tryToInterruptSound) {
            try {   
                soundThread.interrupt();
                Thread.sleep(1); 
                // Sleep in order to let the interruption handling end before
                // exiting the program (else the interruption could be handled
                // after the main thread ends!).
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        System.out.println("" + (System.currentTimeMillis() - startTime) + ": End of main thread; exiting program " + 
                (soundThread.isAlive() ? "killing the sound deamon thread" : ""));
    }
}

尝试使用绝对文件路径或类路径中的路径来解决 FileNotFound 异常。