public String getPwd(String pwd){        String newPwd=null;        try {            MessageDigest md5=MessageDigest.getInstance("MD5");            BASE64Encoder base64en = new BASE64Encoder();            newPwd=base64en.encode(md5.digest(pwd.getBytes("utf-8")));        } catch (NoSuchAlgorithmException e) {            e.printStackTrace();        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        }        return newPwd;    }