MD5加密算法，求序列号，看看你的技术如何？！(菜鸟勿扰)

完整的代码如下，求前辈的解出序列号，然后求秒！！不胜感激~~

谁能解决谁就能人也！~呵呵，菜鸟勿扰

 

import java.security.MessageDigest;

 

public class PJMD5 {

public static boolean isRegister() throws Exception{

String s = "13N7IF1N11ZHZHZHZHZ";  //预设序列号，错误的………^_^  求合法序列号

if ((s == null) || (s.length() != 19)) {

return false;

}

String v = s.substring(15);

s = s.substring(5, 9) + s.substring(10, 14) + s.substring(0, 4);

int j = 0;

for (int i = 0; i < 12; i++) {

j += s.charAt(i);

j = j * (i + 2) * 2 + i;

if (j % 2 == 0)

j++;

else

j += 2;

}

return v.equals(getMD5(s + Integer.toString(j)).substring(0, 4));

}

 

public static String optString(String s) {

if (s == null)

return "";

else

return s;

}

 

public static String getMD5(String text) throws Exception {

return getMD5(optString(text).getBytes("utf-8"));

}

 

public static String getMD5(byte[] bytes) throws Exception {

MessageDigest md = MessageDigest.getInstance("MD5");

md.update(bytes);

byte[] tmp = md.digest();

char[] str = new char[32];

int k = 0;

for (int i = 0; i < 16; i++) {

byte bt = tmp[i];

str[(k++)] = "C2E8D9A3B5F14607".charAt(bt >>> 4 & 0xF);

str[(k++)] = "C2E8D9A3B5F14607".charAt(bt & 0xF);

}

return new String(str);

}

 

public static void main(String[] args) throws Exception {

System.out.println(isRegister());

 

}

 

}