Java中String转MD5

public static String StringToMd5(String psw) {
        {
            try {
                MessageDigest md5 = MessageDigest.getInstance("MD5");
                md5.update(psw.getBytes("UTF-8"));
                byte[] encryption = md5.digest();

                StringBuffer strBuf = new StringBuffer();
                for (int i = 0; i < encryption.length; i++) {
                    if (Integer.toHexString(0xff & encryption[i]).length() == 1) {
                        strBuf.append("0").append(Integer.toHexString(0xff & encryption[i]));
                    } else {
                        strBuf.append(Integer.toHexString(0xff & encryption[i]));
                    }
                }

                return strBuf.toString();
            } catch (NoSuchAlgorithmException e) {
                return "";
            } catch (UnsupportedEncodingException e) {
                return "";
            }
        }
    }