Java MD5加密

 
    public static String encrypt(String text) {
        StringBuilder sb = new StringBuilder("");
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(text.getBytes("UTF-8"));
            byte[] result = md.digest();
            int i;
            for (int offset = 0; offset < result.length; offset++) {
                i = result[offset];
                if (i < 0) {
                    i += 256;
                }
                if (i < 16) {
                    sb.append("0");
                }
                sb.append(Integer.toHexString(i));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return sb.toString();
    }

之后看对接方的大小写要求 可以根据toLowerCase()和toUpperCase()来进行大小写转换