MD5Checksum.java

package org.erlide.cover.core;

import java.io.File;
import java.io.FileInputStream;
import java.security.MessageDigest;

/**
 * Provides a way to calculate md5 checksum to a file
 *
 * @author Aleksandra Lipiec <aleksandra.lipiec@erlang.solutions.com>
 *
 */
public class MD5Checksum {

    public static String getMD5(final File file) throws Exception {

        try (final FileInputStream f = new FileInputStream(file)) {
            final byte[] buffer = new byte[1024];
            final MessageDigest digest = MessageDigest.getInstance("MD5");

            int numRead;
            while ((numRead = f.read(buffer)) != -1) {
                digest.update(buffer, 0, numRead);
            }
            return new String(digest.digest());
        }
    }

}