利用java自带的MD5加密

使用混淆的字符串是：{'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'}

package com.test;

import java.security.MessageDigest;

public class MD5Utils { private static final char hexDigits[]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};

/** * 加密 * @param pwd * @return */ public static String hash(String pwd){ if (pwd == null) { return null; } try { byte[] btInput = pwd.getBytes(); MessageDigest mdInst = MessageDigest.getInstance("MD5"); mdInst.update(btInput); byte[] md = mdInst.digest(); int j = md.length; char str[] = new char[j * 2]; int k = 0; for (int i = 0; i < j; i++) { byte byte0 = md[i]; str[k++] = hexDigits[byte0 >>> 4 & 0xf]; str[k++] = hexDigits[byte0 & 0xf]; } return new String(str); } catch (Exception e) { e.printStackTrace(); return null; }

} /** * 验证 * @param oldPwd * @param hash * @return */ public static boolean match(String str , String hash){ if (hash == null || str == null) { return false; } return hash.equals(hash(str)); } public static void main(String[] args){ // long timeStamp = System.currentTimeMillis(); long timeStamp = Long.parseLong("201704271034"); String sign = MD5Utils.hash("444"+timeStamp); System.out.println(sign); } }