SHA256 encoding

import java.security.MessageDigest;

import java.security.NoSuchAlgorithmException;

public class SHA256 {

    final static String ALGORITHM = "SHA-256";

    

    public String encode(byte[] param) {

        MessageDigest md;

        String endcodedData = null;

        try {

            md = MessageDigest.getInstance(ALGORITHM);

            byte[] hash = md.digest(param);

            StringBuffer hexString = new StringBuffer();

            for (int i = 0; i < hash.length; i++) {

                String hex = Integer.toHexString(0xff & hash[i]);

                if (hex.length() == 1) {

                    hexString.append('0');

                }

                hexString.append(hex);

            }

            endcodedData = hexString.toString();

        } catch (NoSuchAlgorithmException e) {

            System.out.println(e.toString());

        }

        return endcodedData;

    }

}