java MD5

Util.java

 public static String md5(String in) {
        byte[] bytes;
        StringBuilder hashtext;

        try {
            bytes = in.getBytes("UTF-8");
            MessageDigest md = MessageDigest.getInstance("MD5");
            byte[] digest = md.digest(bytes);
            BigInteger bigInt = new BigInteger(1, digest);
            hashtext = new StringBuilder(bigInt.toString(16));
            while (hashtext.length() < 32) {
                hashtext.insert(0, "0", 0, 1);
            }
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e.getMessage());
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e.getMessage());
        }
        return hashtext.toString();
    }