java_method_MD5加密

    /**
     * @param Original String
     * @return Encrypted String
     */
    public String Md5(String plainText ) {
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(plainText.getBytes());
            byte b[] = md.digest();
            int i;
            StringBuffer buf = new StringBuffer("");
            for (int offset = 0; offset < b.length; offset++) {
                i = b[offset];
                if(i<0) i+= 256;
                if(i<16)
                buf.append("0");
                buf.append(Integer.toHexString(i));
            }

            return buf.toString();

        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            ExceptionHeading.getException(this.getClass().getName(), e, "Get Encrypted String Error!");
            return null;
        }
    }