MD5 encryption

 public String MD5(String md5) {
  try {
   java.security.MessageDigest md = java.security.MessageDigest.getInstance("MD5");
   byte[] array = md.digest(md5.getBytes());
   StringBuilder sb = new StringBuilder();
   for (int i = 0; i < array.length; ++i) {
    sb.append(Integer.toHexString((array[i] & 0xFF) | 0x100).substring(1, 3));
   }
   return sb.toString();
  } catch (java.security.NoSuchAlgorithmException e) {
   Logger lgr = Logger.getLogger(UserService.class);
   lgr.log(Level.WARNING, e.getMessage(), e);
  }
  return null;
 }