Java MD5 String md5(String str)

Description

md

License

Open Source License

Declaration

public static String md5(String str) throws NoSuchAlgorithmException 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.IOException;
import java.io.InputStream;

import java.net.MalformedURLException;
import java.net.URI;

import java.security.*;

public class Main {
    private static final char[] binMap = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B',
            'C', 'D', 'E', 'F' };

    public static String md5(String str) throws NoSuchAlgorithmException {
        return hexEncode(md5(str.getBytes()));
    }/*from  www .  j a va2 s . co m*/

    public static byte[] md5(byte[] bytes) throws NoSuchAlgorithmException {
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        return md5.digest(bytes);
    }

    public static byte[] md5(URI uri) throws NoSuchAlgorithmException, MalformedURLException, IOException {
        byte[] bytes = new byte[8192];
        int read = 0;
        MessageDigest md5 = MessageDigest.getInstance("MD5");

        InputStream in = uri.toURL().openStream();
        while ((read = in.read(bytes)) != -1) {
            md5.update(bytes, 0, read);
        }
        in.close();

        return md5.digest();
    }

    public static String hexEncode(byte[] bytes) {
        StringBuilder buff = new StringBuilder(bytes.length * 2);
        for (int i = 0; i < bytes.length; ++i) {
            byte b = bytes[i];
            int b1 = (b >> 4) & 0xF;
            int b2 = (b) & 0xF;
            buff.append(binMap[b1]);
            buff.append(binMap[b2]);
        }

        return buff.toString();
    }
}

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