java 播放midi,wav,mp3

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

public class BasicPlayer {

private AudioInputStream stream = null;
private AudioFormat format = null;
private Clip clip = null;
private SourceDataLine m_line;

public void play(File fileName,int itemStatus)
{
try {
// From file
stream = AudioSystem.getAudioInputStream(fileName);

// At present, ALAW and ULAW encodings must be converted
// to PCM_SIGNED before it can be played
format = stream.getFormat();
if (format.getEncoding() != AudioFormat.Encoding.PCM_SIGNED) {
format = new AudioFormat(
AudioFormat.Encoding.PCM_SIGNED,
format.getSampleRate(),
16,
format.getChannels(),
format.getChannels() * 2,
format.getSampleRate(),
false); // big endian
stream = AudioSystem.getAudioInputStream(format, stream);
}

// Create the clip
DataLine.Info info = new DataLine.Info(SourceDataLine.class, stream.getFormat(), AudioSystem.NOT_SPECIFIED);
m_line = (SourceDataLine) AudioSystem.getLine(info);
m_line.open(stream.getFormat(),m_line.getBufferSize());
m_line.start();

int numRead = 0;
byte[] buf = new byte[m_line.getBufferSize()];
while ((numRead = stream.read(buf, 0, buf.length)) >= 0) {
int offset = 0;
while (offset < numRead) {
offset += m_line.write(buf, offset, numRead-offset);
}
}
m_line.drain();
m_line.stop();
m_line.close();
stream.close();
} catch (IOException e) {
e.printStackTrace();
} catch (LineUnavailableException e) {
e.printStackTrace();
} catch (UnsupportedAudioFileException e) {
e.printStackTrace();
}
}

public double getDuration()
{
return m_line.getBufferSize() /
(m_line.getFormat().getFrameSize() * m_line.getFormat().getFrameRate());
}

public double getDecision()
{
return m_line.getMicrosecondPosition()/1000.0;
}
}