public LDAPUser login(String aUserName, String aPassword) throws InvalidLoginException {
   LDAPUser onlineUser = null;
   try {
     connection.connect(ldapHost, ldapPort);
     System.out.println("Connect Successfull");
     System.out.println(aUserName);
     LDAPSearchQueue searchResults =
         connection.search(
             "o=Aerothai",
             LDAPConnection.SCOPE_SUB,
             "cn=" + aUserName,
             new String[] {LDAPConnection.NO_ATTRS},
             true,
             (LDAPSearchQueue) null);
     LDAPMessage message;
     message = searchResults.getResponse();
     if (message instanceof LDAPSearchResult) {
       LDAPEntry entry = ((LDAPSearchResult) message).getEntry();
       String dn = entry.getDN();
       String[] userDn = dn.split(",");
       String fullDn = userDn[0] + "," + userDn[1] + "," + userDn[2] + ",o=Aerothai";
       connection.bind(ldapVersion, fullDn, aPassword.getBytes("UTF8"));
       System.out.println("Bind Successfull");
       onlineUser = new LDAPUser();
       try {
         onlineUser.setFirstName((String) getAttribute(fullDn, "givenName").elementAt(0));
         onlineUser.setLastName((String) getAttribute(fullDn, "sn").elementAt(0));
         try {
           Integer.parseInt((String) getAttribute(fullDn, "cn").elementAt(1));
           onlineUser.setEmployeeCode((String) getAttribute(fullDn, "cn").elementAt(1));
         } catch (NumberFormatException e) {
           onlineUser.setEmployeeCode((String) getAttribute(fullDn, "cn").elementAt(0));
         }
         onlineUser.setDepartment((String) getAttribute(fullDn, "ou").elementAt(0));
         onlineUser.setLocation((userDn[2].split("="))[1]);
       } catch (ArrayIndexOutOfBoundsException e1) {
         e1.printStackTrace();
         onlineUser = null;
         throw new InvalidLoginException(
             "à¡Ô´¤ÇÒÁ¼Ô´¾ÅÒ´ÃÐËÇèÒ§¡Òô֧¢éÍÁÙÅ ¡ÃØ³Ò Login ãËÁèÍÕ¡¤ÃÑé§");
       }
     } else {
       disconnect();
       throw new InvalidLoginException(
           "äÁ辺¼Ùéãªé§Ò¹ª×èÍ "
               + aUserName
               + " ¡ÃسÒÅͧÍÕ¡¤ÃÑé§ ËÃ×Í µÔ´µèÍà¨éÒ˹éÒ·Õè¡Í§Ç¤.¾Ç. à¾×è͵ÃǨÊͺ¢éÍÁÙŢͧ·èÒ¹");
     }
     disconnect();
   } catch (LDAPException e) {
     e.printStackTrace();
     throw new InvalidLoginException(
         "ÃËÑʼèÒ¹äÁè¶Ù¡µéͧ ¡ÃسÒÅͧÍÕ¡¤ÃÑé§ ËÃ×Í µÔ´µèÍà¨éÒ˹éÒ·Õè¡Í§Ç¤.¾Ç. à¾×è͵ÃǨÊͺ¢éÍÁÙŢͧ·èÒ¹");
   } catch (UnsupportedEncodingException e) {
     e.printStackTrace();
     throw new InvalidLoginException(e);
   } finally {
     disconnect();
   }
   return onlineUser;
 }