md5 加密工具类

来源：互联网发布：mysql if函数用法编辑：程序博客网时间：2024/06/05 09:24

安全加密方式 MD5 ,关键词不可逆彩虹表加盐

package test.test.util;import java.security.MessageDigest;public class Md5Util {    /*     * public static int getLocation(String[] fields, String field) { if (fields ==     * null || fields.length == 0) { return -1; } for (int i = 0; i <     * fields.length; i++) { //System.out.println(fields[i]); if     * (fields[i].indexOf(field) != -1) { //System.out.println("i:" + i); return     * i; } } return -1; }     */    private final static String[] hexDigits = { "0", "1", "2", "3", "4", "5",            "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };    public static String byteArrayToHexString(byte[] b) {        StringBuffer resultSb = new StringBuffer();        for (int i = 0; i < b.length; i++) {            resultSb.append(byteToHexString(b[i]));        }        return resultSb.toString();    }    private static String byteToHexString(byte b) {        int n = b;        if (n < 0)            n = 256 + n;        int d1 = n / 16;        int d2 = n % 16;        return hexDigits[d1] + hexDigits[d2];    }    /**     * MD5Encode     * @param origin     * @return MD5 code     */    public static String MD5Encode(String origin) {        String resultString = null;        try {            resultString = new String(origin);            MessageDigest md = MessageDigest.getInstance("MD5");            resultString = byteArrayToHexString(md.digest(resultString                    .getBytes()));        } catch (Exception ex) {        }        return resultString;    }}

阅读全文

0 0