java中播放声音的问题（不是applet）

[abcdefg007]

java application中如何播放声音？

我找到一段代码
try {
// From file
AudioInputStream stream = AudioSystem.getAudioInputStream(new File("audiofile"));

// From URL
stream = AudioSystem.getAudioInputStream(new URL("http://hostname/audiofile"));

// At present, ALAW and ULAW encodings must be converted
// to PCM_SIGNED before it can be played
AudioFormat format = stream.getFormat();
if (format.getEncoding() != AudioFormat.Encoding.PCM_SIGNED) {
format = new AudioFormat(
AudioFormat.Encoding.PCM_SIGNED,
format.getSampleRate(),
format.getSampleSizeInBits()*2,
format.getChannels(),
format.getFrameSize()*2,
format.getFrameRate(),
true); // big endian
stream = AudioSystem.getAudioInputStream(format, stream);
}

// Create the clip
DataLine.Info info = new DataLine.Info(
Clip.class, stream.getFormat(), ((int)stream.getFrameLength()*format.getFrameSize()));
Clip clip = (Clip) AudioSystem.getLine(info);

// This method does not return until the audio file is completely loaded
clip.open(stream);

// Start playing
clip.start();
} catch (MalformedURLException e) {
} catch (IOException e) {
} catch (LineUnavailableException e) {
} catch (UnsupportedAudioFileException e) {
}
参见：http://www.exampledepot.com/egs/javax.sound.sampled/Load.html
把其中audiofile改成sound.wav,
http://hostname/audiofile改成file:\\E:\\sound.wav，但运行并没有播放声音
是什么问题呢？

或者还有其他什么方法能实现？
谢谢！

[kerry_lulu]

有exception吗，你这样全部catch又不打印，怎么调试

[abcdefg007]

哦~~~
异常信息如下：
java.io.FileNotFoundException: Global.wav (系统找不到指定的文件。)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:106)
at com.sun.media.sound.WaveFileReader.getAudioInputStream(WaveFileReader.java:205)
at javax.sound.sampled.AudioSystem.getAudioInputStream(AudioSystem.java:778)
at Test.main(Test.java:19)

但是．．为什么呢？

[sunyujia]

我帮你把上面的程序改好了,但是在改的时候发现这段示例很bt,不建议楼主使用这套程序.

	public static void main(String[] args) {
		Thread td = new Thread() {
			public void run() {
				try {
					// From URL
					AudioInputStream stream = AudioSystem
							.getAudioInputStream(new File("C:\\TEMP\\a.wav"));
					// At present, ALAW and ULAW encodings must be converted
					// to PCM_SIGNED before it can be played
					AudioFormat format = stream.getFormat();
					if (format.getEncoding() != AudioFormat.Encoding.PCM_SIGNED) {
						format = new AudioFormat(
								AudioFormat.Encoding.PCM_SIGNED, format
										.getSampleRate(), format
										.getSampleSizeInBits() * 2, format
										.getChannels(),
								format.getFrameSize() * 2, format
										.getFrameRate(), true); // big
						// endian
						stream = AudioSystem
								.getAudioInputStream(format, stream);
					}

					// Create the clip
					DataLine.Info info = new DataLine.Info(Clip.class, stream
							.getFormat(),
							((int) stream.getFrameLength() * format
									.getFrameSize()));
					Clip clip = (Clip) AudioSystem.getLine(info);

					// This method does not return until the audio file is
					// completely
					// loaded
					clip.open(stream);

					// Start playing
					clip.start();
					synchronized (this) {
						try {
							wait();
						} catch (InterruptedException e) {
							e.printStackTrace();
						}
					}
				} catch (MalformedURLException e) {
					e.printStackTrace();
				} catch (IOException e) {
					e.printStackTrace();
				} catch (LineUnavailableException e) {
					e.printStackTrace();
				} catch (UnsupportedAudioFileException e) {
					e.printStackTrace();
				}
			}
		};
		td.setDaemon(false);
		td.start();
	}

[sunyujia]

我把线程wait();了你要根据实际环境唤醒,主要是我没找到播放wav文件的线程.

[sunyujia]

在你的app中可以把
synchronized (this) {
try {
wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
去掉
下面的也去掉
Thread td = new Thread() {
public void run() {
.....
td.setDaemon(false);
td.start();
}

这些信息我是为了调试加上的,你的程序如果有主线程的话,无需这些代码了

[abcdefg007]

to sunyujia:
异常？
javax.sound.sampled.UnsupportedAudioFileException: could not get audio input stream from input file
at javax.sound.sampled.AudioSystem.getAudioInputStream(AudioSystem.java:786)
at Test$1.run(Test.java:70)

[sunyujia]

这个你改的文件也是wav吗
我试过了
"C:\\TEMP\\a.wav"

[abcdefg007]

不知道为什么，我换了个wav文件就可以了
谢谢你啊～

另，找到了一个更简洁的办法..
try {
InputStream in = new FileInputStream("E:\\a.wav");//流文件
try {
AudioStream as = new AudioStream(in);//创建AudioStream 对象
AudioPlayer.player.start(as);//开始播放
//AudioPlayer.player.stop(as);//停止播放，本例没有设置播放时间，歌曲结束自动停止
} catch (IOException e){
e.printStackTrace();
}

} catch (FileNotFoundException e) {
e.printStackTrace();
}

[sunyujia]

上面那个简单的方法无法播放mp3转换成wav的文件,
处理不了复杂的波形