【项目从0到1】前端jQuery 和 Java MD5加密

这次的项目有APP端和微信H5端，而且都可以实现用户注册，用户注册时密码必须加密，但是必须要保证H5端使用的加密算法和Java端的一致，否则用户登录肯定会有问题的。下面就贴出一个算法一致的代码：

jQuery

/* * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message * Digest Algorithm, as defined in RFC 1321. * Copyright (C) Paul Johnston 1999 - 2000. * Updated by Greg Holt 2000 - 2001. * See http://pajhome.org.uk/site/legal.html for details. */var hex_chr = "0123456789abcdef";function rhex(num) {    str = "";    for (j = 0; j <= 3; j++) {        str += hex_chr.charAt((num >> (j * 8 + 4)) & 15) + hex_chr.charAt((num >> (j * 8)) & 15);    }    return str;}function str2blks_MD5(str) {    nblk = ((str.length + 8) >> 6) + 1;    blks = new Array(nblk * 16);    for (i = 0; i < nblk * 16; i++) {        blks[i] = 0;    }    for (i = 0; i < str.length; i++) {        blks[i >> 2] |= str.charCodeAt(i) << ((i % 4) * 8);    }    blks[i >> 2] |= 128 << ((i % 4) * 8);    blks[nblk * 16 - 2] = str.length * 8;    return blks;}function add(x, y) {    var lsw = (x & 65535) + (y & 65535);    var msw = (x >> 16) + (y >> 16) + (lsw >> 16);    return (msw << 16) | (lsw & 65535);}function rol(num, cnt) {    return (num << cnt) | (num >>> (32 - cnt));}function cmn(q, a, b, x, s, t) {    return add(rol(add(add(a, q), add(x, t)), s), b);}function ff(a, b, c, d, x, s, t) {    return cmn((b & c) | ((~b) & d), a, b, x, s, t);}function gg(a, b, c, d, x, s, t) {    return cmn((b & d) | (c & (~d)), a, b, x, s, t);}function hh(a, b, c, d, x, s, t) {    return cmn(b ^ c ^ d, a, b, x, s, t);}function ii(a, b, c, d, x, s, t) {    return cmn(c ^ (b | (~d)), a, b, x, s, t);}function MD5(str) {    x = str2blks_MD5(str);    var a = 1732584193;    var b = -271733879;    var c = -1732584194;    var d = 271733878;    for (i = 0; i < x.length; i += 16) {        var olda = a;        var oldb = b;        var oldc = c;        var oldd = d;        a = ff(a, b, c, d, x[i + 0], 7, -680876936);        d = ff(d, a, b, c, x[i + 1], 12, -389564586);        c = ff(c, d, a, b, x[i + 2], 17, 606105819);        b = ff(b, c, d, a, x[i + 3], 22, -1044525330);        a = ff(a, b, c, d, x[i + 4], 7, -176418897);        d = ff(d, a, b, c, x[i + 5], 12, 1200080426);        c = ff(c, d, a, b, x[i + 6], 17, -1473231341);        b = ff(b, c, d, a, x[i + 7], 22, -45705983);        a = ff(a, b, c, d, x[i + 8], 7, 1770035416);        d = ff(d, a, b, c, x[i + 9], 12, -1958414417);        c = ff(c, d, a, b, x[i + 10], 17, -42063);        b = ff(b, c, d, a, x[i + 11], 22, -1990404162);        a = ff(a, b, c, d, x[i + 12], 7, 1804603682);        d = ff(d, a, b, c, x[i + 13], 12, -40341101);        c = ff(c, d, a, b, x[i + 14], 17, -1502002290);        b = ff(b, c, d, a, x[i + 15], 22, 1236535329);        a = gg(a, b, c, d, x[i + 1], 5, -165796510);        d = gg(d, a, b, c, x[i + 6], 9, -1069501632);        c = gg(c, d, a, b, x[i + 11], 14, 643717713);        b = gg(b, c, d, a, x[i + 0], 20, -373897302);        a = gg(a, b, c, d, x[i + 5], 5, -701558691);        d = gg(d, a, b, c, x[i + 10], 9, 38016083);        c = gg(c, d, a, b, x[i + 15], 14, -660478335);        b = gg(b, c, d, a, x[i + 4], 20, -405537848);        a = gg(a, b, c, d, x[i + 9], 5, 568446438);        d = gg(d, a, b, c, x[i + 14], 9, -1019803690);        c = gg(c, d, a, b, x[i + 3], 14, -187363961);        b = gg(b, c, d, a, x[i + 8], 20, 1163531501);        a = gg(a, b, c, d, x[i + 13], 5, -1444681467);        d = gg(d, a, b, c, x[i + 2], 9, -51403784);        c = gg(c, d, a, b, x[i + 7], 14, 1735328473);        b = gg(b, c, d, a, x[i + 12], 20, -1926607734);        a = hh(a, b, c, d, x[i + 5], 4, -378558);        d = hh(d, a, b, c, x[i + 8], 11, -2022574463);        c = hh(c, d, a, b, x[i + 11], 16, 1839030562);        b = hh(b, c, d, a, x[i + 14], 23, -35309556);        a = hh(a, b, c, d, x[i + 1], 4, -1530992060);        d = hh(d, a, b, c, x[i + 4], 11, 1272893353);        c = hh(c, d, a, b, x[i + 7], 16, -155497632);        b = hh(b, c, d, a, x[i + 10], 23, -1094730640);        a = hh(a, b, c, d, x[i + 13], 4, 681279174);        d = hh(d, a, b, c, x[i + 0], 11, -358537222);        c = hh(c, d, a, b, x[i + 3], 16, -722521979);        b = hh(b, c, d, a, x[i + 6], 23, 76029189);        a = hh(a, b, c, d, x[i + 9], 4, -640364487);        d = hh(d, a, b, c, x[i + 12], 11, -421815835);        c = hh(c, d, a, b, x[i + 15], 16, 530742520);        b = hh(b, c, d, a, x[i + 2], 23, -995338651);        a = ii(a, b, c, d, x[i + 0], 6, -198630844);        d = ii(d, a, b, c, x[i + 7], 10, 1126891415);        c = ii(c, d, a, b, x[i + 14], 15, -1416354905);        b = ii(b, c, d, a, x[i + 5], 21, -57434055);        a = ii(a, b, c, d, x[i + 12], 6, 1700485571);        d = ii(d, a, b, c, x[i + 3], 10, -1894986606);        c = ii(c, d, a, b, x[i + 10], 15, -1051523);        b = ii(b, c, d, a, x[i + 1], 21, -2054922799);        a = ii(a, b, c, d, x[i + 8], 6, 1873313359);        d = ii(d, a, b, c, x[i + 15], 10, -30611744);        c = ii(c, d, a, b, x[i + 6], 15, -1560198380);        b = ii(b, c, d, a, x[i + 13], 21, 1309151649);        a = ii(a, b, c, d, x[i + 4], 6, -145523070);        d = ii(d, a, b, c, x[i + 11], 10, -1120210379);        c = ii(c, d, a, b, x[i + 2], 15, 718787259);        b = ii(b, c, d, a, x[i + 9], 21, -343485551);        a = add(a, olda);        b = add(b, oldb);        c = add(c, oldc);        d = add(d, oldd);    }    return rhex(a) + rhex(b) + rhex(c) + rhex(d);}

Java

import java.security.MessageDigest;/** * Created by promonkey on 2017/3/12. */public class Md5Util {    /**     * 进行MD5加密算法     *     * @param str     * @return     */    public static String EncoderByMd5(String str) {        StringBuffer sb = new StringBuffer();        try {            MessageDigest md = MessageDigest.getInstance("MD5");            md.update(str.getBytes());            byte b[] = md.digest();            int i;            for (int offset = 0; offset < b.length; offset++) {                i = b[offset];                if (i < 0)                    i += 256;                if (i < 16)                    sb.append("0");                sb.append(Integer.toHexString(i));            }        } catch (Exception e) {            return null;            //          e.printStackTrace();        }        return sb.toString();    }}

测试：
jQuery端：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> </head><meta http-equiv="pragma" content="no-cache" /><meta http-equiv="cache-control" content="no-cache" /><meta http-equiv="expires" content="0" /><meta http-equiv="keywords" content="keyword1,keyword2,keyword3" /><meta http-equiv="description" content="This is my page" /><script type="text/javascript" src="md5.js"></script><script type="text/javascript">function c(){    console.log("md5:");    console.log(MD5("admin123"));}</script></head><body><a href="javascript:;" onclick="c()">test</a></body></html>

Java

 public static void main(String[] args) {        try {            System.out.println( Md5Util.EncoderByMd5("admin123"));        } catch (Exception e) {            //        }    }

测试结果：