jsp整合discuz

import java.io.UnsupportedEncodingException;
import java.util.Map;
import java.util.Iterator;
import java.util.Random;
import java.util.Set;
import sun.misc.BASE64Decoder;

public class DiscuzPassport {

 public static String encrypt(String src, String key) {
  Random random = new Random();
  random.setSeed(System.currentTimeMillis());
  String rand = "" + random.nextInt() % 32000;
  String encKey = Encryption.generateKey(rand, "MD5");

  int ctr = 0;
  String tmp = "";

  for (int i = 0; i < src.length(); i++) {
   ctr = (ctr == encKey.length() ? 0 : ctr);
   tmp += encKey.charAt(ctr);
   char c = (char) (src.charAt(i) ^ encKey.charAt(ctr));
   tmp += c;
   ctr++;
  }
  String passportKey = passportKey(tmp, key);
  return new sun.misc.BASE64Encoder().encode(passportKey.getBytes());
 }

 public static String decrypt(String src, String key) {
  byte[] bytes = null;
  try {
   bytes = new BASE64Decoder().decodeBuffer(src);
   src = new String(bytes);
  } catch (Exception e) {
   return null;
  }
  src = passportKey(src, key);

  String tmp = "";
  for (int i = 0; i < src.length(); ++i) {
   char c = (char) (src.charAt(i) ^ src.charAt(++i));
   tmp += c;
  }
  return tmp;
 }

 public static String passportKey(String src, String key) {
  String encKey = Encryption.generateKey(key, "MD5");

  int ctr = 0;
  String tmp = "";
  for (int i = 0; i < src.length(); ++i) {
   ctr = (ctr == encKey.length() ? 0 : ctr);
   char c = (char) (src.charAt(i) ^ encKey.charAt(ctr));
   tmp += c;
   ctr++;
  }
  return tmp;
 }

 public static String passportEncode(Map data) {
  Set keys = data.keySet();
  String key = "";
  String ret = "";
  Iterator iterator = keys.iterator();
  while (iterator.hasNext()) {
   key = (String) iterator.next();
   try
   {
    ret += key + "=" + (String) data.get(key) + "&";
   }
   catch (Exception e)
   {
    return "";
   }
  }
  if (ret.length() > 0)
   return ret.substring(0, ret.length() - 1);
  return "";
 }
}

------------------------------

-----Encryption.java-----

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Encryption {

 public static String generateKey(String src, String algorithm) {
  MessageDigest m = null;
  try
  {
   m = MessageDigest.getInstance(algorithm);
   m.update(src.getBytes("UTF8"));
  }
  catch (NoSuchAlgorithmException e)
  {
   e.printStackTrace();
  }
  catch (UnsupportedEncodingException e)
  {
   e.printStackTrace();
  }
  byte s[] = m.digest();
  String result = "";
  for (int i = 0; i < s.length; i++)
  {
   result += Integer.toHexString(
     (0x000000FF & s[i]) | 0xFFFFFF00).substring(6);
  }

  return result;

 }

}

<tag:LoginCheck login="false"> 
<%
 response.sendRedirect("http://bbs.com/");
%>
</tag:LoginCheck>

<tag:LoginCheck login="true"> 

<%
 response.sendRedirect("logined.jsp?forward=http://bbs.com/&bbsRedirect=true");
%>
</tag:LoginCheck>