各位大虾们，急求解决，在执行音频文件出现异常。

//播放音频文件
    public void play(){
        String fileurl = "e:\\xxx.wav";
        try{
        InputStream in=new FileInputStream(new File(fileurl));
        BufferedInputStream sb=new BufferedInputStream(in);
            AudioInputStream ais = AudioSystem.getAudioInputStream (sb);
            AudioFormat aif = ais.getFormat();
            SourceDataLine sdl = null;
            DataLine.Info info = new DataLine.Info(SourceDataLine.class,aif);
            sdl = (SourceDataLine)AudioSystem.getLine(info);
            sdl.open(aif);
            sdl.start();
            //play
            int nByte = 0;
            byte[] buffer = new byte[128];
            while(nByte != -1){
                nByte = ais.read(buffer,0,128);
                if(nByte >= 0){
                    int oByte = sdl.write(buffer, 0, nByte);
                    System.out.println(oByte);
                }
            }
            sdl.stop();
        }catch(UnsupportedAudioFileException e){
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (LineUnavailableException e) {
            e.printStackTrace();
        }
    }


在运行时   这段代码《AudioInputStream ais=AudioSystem.getAudioInputStream (sb);》出现异常如下：
javax.sound.sampled.UnsupportedAudioFileException: could not get audio input stream from input stream
at javax.sound.sampled.AudioSystem.getAudioInputStream(AudioSystem.java:1102)
at test.AudioDemo.play(AudioDemo.java:31)
at test.AudioDemo.main(AudioDemo.java:93)

有谁遇到过没，各位大虾帮忙指点迷津。不胜感激！