HashUtil.java

package org.hopto.energy;

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class HashUtil {

    public static String getMD5(final String data) {
        try {
            MessageDigest m = MessageDigest.getInstance("MD5");
            m.reset();
            m.update(data.getBytes());
            BigInteger bigInt = new BigInteger(1, m.digest());
            String hashText = bigInt.toString(16);
            while (hashText.length() < 32) {
                hashText = "0" + hashText;
            }
            return hashText;
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            return e.getMessage();
        }
    }

}