WAV轉換MP3報錯

import it.sauronsoftware.jave.AudioAttributes;
import it.sauronsoftware.jave.Encoder;
import it.sauronsoftware.jave.EncoderException;
import it.sauronsoftware.jave.EncodingAttributes;
import it.sauronsoftware.jave.InputFormatException;


import java.io.File;


public class TestWAV {

public static void main(String[] args) throws IllegalArgumentException, InputFormatException, EncoderException {
File source = new File("c://1111.wav");
  File target = new File("c://111.mp3");
  AudioAttributes audio = new AudioAttributes();
  audio.setCodec("libmp3lame");
  audio.setBitRate(new Integer(128000));
  audio.setChannels(new Integer(1));
  audio.setSamplingRate(new Integer(44100));
  EncodingAttributes attrs = new EncodingAttributes();
  attrs.setFormat("mp3");
  attrs.setAudioAttributes(audio);
  Encoder encoder = new Encoder();
  encoder.encode(source, target, attrs);
  System.out.print("Success!");

}

}