256加密

 

    private static StringbyteToHexString(byte[] bytes)
    {
        final int andOpr = 0xFF;
        String fillStr = "0"; 
        StringBuffer hexString = newStringBuffer();
        for (int i = 0; i < bytes.length;i++)
        {
            String hex =Integer.toHexString(bytes[i] & andOpr);
            if (hex.length() == 1)
            {
                hex = fillStr + hex;
            }
            hexString.append(hex);
        }
        return hexString.toString();
    }

public static StringencryptWithSHA256(String str)
    {
        String sha256Str = null;
        String mdType = "SHA-256";
        try
        {
            MessageDigest md =MessageDigest.getInstance(mdType);
            md.update(str.getBytes());
            sha256Str =byteToHexString(md.digest());
        }
        catch (NoSuchAlgorithmException e)
        {
            logger.error("Failed toencrypt password.", e);
        }
        return sha256Str;
    }

2.C#

private staticstring entrypt(string strSrc)
        {
            SHA256 sha256 = newSHA256Managed();
            ASCIIEncoding asc = newASCIIEncoding();
            byte[] srcByte =sha256.ComputeHash(asc.GetBytes(strSrc));
            StringBuilder sb = newStringBuilder();
            foreach (byte num in srcByte)
            {
               sb.AppendFormat("{0:x2}", num);
            }
            return sb.ToString();
        }