package com.yun.park.service.utils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.security.MessageDigest; /**  * Created by asus on 2016/12/12.  */ public class MD5 {
      private static Logger logger = LoggerFactory.getLogger(MD5.class);     private final static String[] hexDigits = { "0", "1", "2", "3", "4", "5",             "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };     /**      * 转换字节数组为16进制字串      *      * @param b      *            字节数组      * @return 16进制字串      */     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];     }     public static String MD5Encode(String paramStr) {
          String resultString = paramStr;         try {
              MessageDigest md = MessageDigest.getInstance("MD5");             resultString = byteArrayToHexString(md.digest(resultString                     .getBytes()));         } catch (Exception ex) {
              logger.debug("MD5Encode = {}",ex);         }         return resultString;     } }