Java MD5 Byte Array md5(final byte[] b)

Description

md

License

Apache License

Declaration

public static String md5(final byte[] b) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;

public class Main {
    public static String md5(final byte[] b) {
        final StringBuilder sb = new StringBuilder();
        for (final byte element : b) {
            int i = element;
            if (i < 0) {
                i += 256;//from  ww w . j  av a  2 s. co m
            }
            if (i < 16) {
                sb.append('0');
            }
            sb.append(Integer.toHexString(i));
        }
        return sb.toString();
    }

    public static String md5(final Object... objects) {
        return md5(Arrays.toString(objects));
    }

    public static String md5(final String plainText) {
        if (plainText != null) {
            try {
                final MessageDigest md = MessageDigest.getInstance("MD5");
                final byte[] b = md.digest(plainText.getBytes());
                return md5(b);
            } catch (final NoSuchAlgorithmException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

    public static String md5(final File file) {
        FileInputStream fin = null;
        try {
            fin = new FileInputStream(file);
            final byte[] b = new byte[8192];
            int length;
            final MessageDigest md = MessageDigest.getInstance("MD5");
            while ((length = fin.read(b)) != -1) {
                md.update(b, 0, length);
            }
            return md5(md.digest());
        } catch (final Exception e) {
            e.printStackTrace();
        } finally {
            if (fin != null) {
                try {
                    fin.close();
                } catch (final IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return null;
    }
}

Related

1. md5(byte[] source)
2. md5(byte[] source)
3. md5(byte[] source)
4. MD5(byte[] src)
5. md5(byte[] str)
6. md5(final byte[] bytes)
7. md5(final byte[] data)
8. md5Byte(String encryptStr)
9. MD5Bytes(byte[] src)