Java 实现麦克风自动录音

public class EngineeCore {

  String filePath = "E:\\voice\\voice_cache.wav";

  AudioFormat audioFormat;
  TargetDataLine targetDataLine;
  boolean flag = true;
private void stopRecognize() {
    flag = false;
    targetDataLine.stop();
    targetDataLine.close();
  }private AudioFormat getAudioFormat() {
    float sampleRate = 16000;
    // 8000,11025,16000,22050,44100
    int sampleSizeInBits = 16;
    // 8,16
    int channels = 1;
    // 1,2
    boolean signed = true;
    // true,false
    boolean bigEndian = false;
    // true,false
    return new AudioFormat(sampleRate, sampleSizeInBits, channels, signed, bigEndian);
  }// end getAudioFormat


  private void startRecognize() {
    try {
      // 获得指定的音频格式
      audioFormat = getAudioFormat();
      DataLine.Info dataLineInfo = new DataLine.Info(TargetDataLine.class, audioFormat);
      targetDataLine = (TargetDataLine) AudioSystem.getLine(dataLineInfo);

      // Create a thread to capture the microphone
      // data into an audio file and start the
      // thread running. It will run until the
      // Stop button is clicked. This method
      // will return after starting the thread.
      flag = true;
      new CaptureThread().start();
    } catch (Exception e) {
      e.printStackTrace();
    } // end catch
  }// end captureAudio method

  class CaptureThread extends Thread {
    public void run() {
      AudioFileFormat.Type fileType = null;
      File audioFile = new File(filePath);

      fileType = AudioFileFormat.Type.WAVE;
      //声音录入的权值
      int weight = 2;
      //判断是否停止的计数
      int downSum = 0;

      ByteArrayInputStream bais = null;
      ByteArrayOutputStream baos = new ByteArrayOutputStream();
      AudioInputStream ais = null;
      try {
        targetDataLine.open(audioFormat);
        targetDataLine.start();
        byte[] fragment = new byte[1024];

        ais = new AudioInputStream(targetDataLine);
        while (flag) {

          targetDataLine.read(fragment, 0, fragment.length);
          //当数组末位大于weight时开始存储字节（有声音传入），一旦开始不再需要判断末位
          if (Math.abs(fragment[fragment.length-1]) > weight || baos.size() > 0) {
            baos.write(fragment);
            System.out.println("守卫："+fragment[0]+",末尾："+fragment[fragment.length-1]+",lenght"+fragment.length);
            //判断语音是否停止
            if(Math.abs(fragment[fragment.length-1])<=weight){
              downSum++;
            }else{
              System.out.println("重置奇数");
              downSum=0;
            }　　　　　　　　　　　　　　　//计数超过20说明此段时间没有声音传入(值也可更改)
            if(downSum>20){
              System.out.println("停止录入");
              break;
            }

          }
        }

        //取得录音输入流
        audioFormat = getAudioFormat();
        byte audioData[] = baos.toByteArray();
        bais = new ByteArrayInputStream(audioData);
        ais = new AudioInputStream(bais, audioFormat, audioData.length / audioFormat.getFrameSize());
        //定义最终保存的文件名
        System.out.println("开始生成语音文件");
        AudioSystem.write(ais, AudioFileFormat.Type.WAVE, audioFile);
        downSum = 0;
        stopRecognize();

      } catch (Exception e) {
        e.printStackTrace();
      } finally {
        //关闭流

        try {
          ais.close();
          bais.close();
          baos.reset();
        } catch (IOException e) {
          e.printStackTrace();
        }
      }

    }// end run
  }// end inner class CaptureThread

  public static void main(String args[]) {
    EngineeCore engineeCore = new EngineeCore();

      engineeCore.startRecognize();

  }