JAVA按顺序播放多个wav音频

Posted 2020-09-28 思微随想

用Java按顺序播放多个音频部件，不是同时播放。代码如下：

            List<String> files = new ArrayList<String>();
            files.add("barcode_prefix.wav");
            for (char letter : barcode.toCharArray())
            {
                files.add(letter + ".wav");
            }
            files.add("barcode_suffix.wav");
            
            byte[] buffer = new byte[4096];
            for (String file : files)
            {
                try
                {
                    AudioInputStream is = Audiosystem.getAudioInputStream(this.getClass().getResourceAsStream(file));
                    AudioFormat format = is.getFormat();
                    SourceDataLine line = AudioSystem.getSourceDataLine(format);
                    line.open(format);
                    line.start();
                    while (is.available() > 0)
                    {
                        int len = is.read(buffer);
                        line.write(buffer, 0, len);
                    }
                    line.drain(); // **[DEIT]** wait for the buffer to empty before closing the line
                    line.close();
                }
                catch (Exception e)
                {
                    e.printStackTrace();
                }
            }

这个我在本地播放没有问题，放到服务器上会报错：

java.io.IOException: mark/reset not supported
	at java.util.zip.InflaterInputStream.reset(Unknown Source)
	at com.sun.media.sound.SoftMidiAudioFileReader.getAudioInputStream(Unknown Source)
	at javax.sound.sampled.AudioSystem.getAudioInputStream(Unknown Source)
	at com.yulong.mes.winapp.form.quality.ForBatchOperationForm$PlayAudioRunnable.run(ForBatchOperationForm.java:4317)
	at java.lang.Thread.run(Unknown Source)

网上说要用BufferedInputStream封装一下。修改下代码确实如此：

 List<String> files = new ArrayList<String>();
            files.add("barcode_prefix.wav");
            for (char letter : barcode.toCharArray())
            {
                files.add(letter + ".wav");
            }
            files.add("barcode_suffix.wav");
            
            byte[] buffer = new byte[4096];
            for (String file : files)
            {
                try
                {
                    InputStream stream = this.getClass().getResourceAsStream(file);
                    InputStream bufferedIn = new BufferedInputStream(stream);
                    
                    AudioInputStream is = AudioSystem.getAudioInputStream(bufferedIn);
                    AudioFormat format = is.getFormat();
                    SourceDataLine line = AudioSystem.getSourceDataLine(format);
                    line.open(format);
                    line.start();
                    while (is.available() > 0)
                    {
                        int len = is.read(buffer);
                        line.write(buffer, 0, len);
                    }
                    line.drain(); // **[DEIT]** wait for the buffer to empty before closing the line
                    line.close();
                }
                catch (Exception e)
                {
                    e.printStackTrace();
                }
            }