Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {

    public static byte[] calculateMd5(byte[] binaryData) {
        MessageDigest messageDigest = null;
        try {
            messageDigest = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("MD5 algorithm not found.");
        }
        messageDigest.update(binaryData);
        return messageDigest.digest();

    }

    public static byte[] calculateMd5(String filePath) throws IOException {
        try {
            MessageDigest digest = MessageDigest.getInstance("MD5");
            byte[] buffer = new byte[4 * 1024];
            InputStream is = new FileInputStream(new File(filePath));
            int lent;
            while ((lent = is.read(buffer)) != -1) {
                digest.update(buffer, 0, lent);
            }
            is.close();
            return digest.digest();
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("MD5 algorithm not found.");
        }
    }
}