java MD5算法工具类

package com.zlxls.util;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;/** * * MD算法工具类 * @ClassNmae：NewClass    * @author zlx-雄雄 * @date    2017-8-16 11:42:41 *  */public class MD5 {    /**     * @Description：全局数组     */    private final static String[] strDigits = { "0", "1", "2", "3", "4", "5","6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };    public MD5() {    }    /**     * @Description：返回形式为数字跟字符串     * @param bByte     * @return 返回形式为数字跟字符串     */    private static String byteToArrayString(byte bByte) {        int iRet = bByte;        // System.out.println("iRet="+iRet);        if (iRet < 0) {            iRet += 256;        }        int iD1 = iRet / 16;        int iD2 = iRet % 16;        return strDigits[iD1] + strDigits[iD2];    }    /**     * @Description：返回形式只为数字     * @param bByte     * @return 返回形式只为数字     */    private static String byteToNum(byte bByte) {        int iRet = bByte;        System.out.println("iRet1=" + iRet);        if (iRet < 0) {            iRet += 256;        }        return String.valueOf(iRet);    }    /**     * @Description：转换字节数组为16进制字串     * @param bByte     * @return      */    private static String byteToString(byte[] bByte) {        StringBuilder sBuffer = new StringBuilder();        for (int i = 0; i < bByte.length; i++) {            sBuffer.append(byteToArrayString(bByte[i]));        }        return sBuffer.toString();    }    /**     * @param strObj     * @Description：获取MD5字符串     * @return MD5字符串     */    public static String GetMD5Code(String strObj) {        String resultString = null;        try {            resultString = strObj;            MessageDigest md = MessageDigest.getInstance("MD5");            // md.digest() 该函数返回值为存放哈希值结果的byte数组            resultString = byteToString(md.digest(strObj.getBytes()));        } catch (NoSuchAlgorithmException ex) {        }        return resultString;    }}