java - How to use zlib gzip a string in nodejs?

在stackoverflow问了没人鸟我。。。
How to use zlib gzip a string in nodejs?

The result is difference between using GZIPOutputStream in java and using zlib.gzipSync() in nodejs zlib module;

the js code :

    var endata = zlib.gzipSync(stringData);

the java code :

public static byte[] gzipData(String data) throws Exception {
  byte[] b = null;
  if (!StringUtils.isEmpty(data)) {
      ByteArrayOutputStream bos = new ByteArrayOutputStream();
      GZIPOutputStream gzip = new GZIPOutputStream(bos);
      gzip.write(data.getBytes());
      gzip.finish();
      gzip.close();
      b = bos.toByteArray();
      bos.close(); 
  }
    return b;
}