I am having problems creating login session with java Servlet.

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  • judge82
    New Member
    • Jul 2007
    • 24
    #1

    I am having problems creating login session with java Servlet.

    please I am learning how to use servlet. here is my code

    Code:
    package TestWebApp;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*; 

public class RegLoginServlet extends HttpServlet {
  public void doGet(HttpServletRequest request,
                    HttpServletResponse response)
      throws ServletException, IOException {
    response.setContentType("text/html");
    HttpSession session = request.getSession();
    String heading;
    Integer accessCount =
      (Integer)session.getAttribute("accessCount");
    if (accessCount == null) {
      accessCount = new Integer(0);
      heading = "Welcome, Newcomer";
    } else {
      heading = "Welcome Back";
      accessCount = new Integer(accessCount.intValue() + 1);
    }
        out.println("<html>");
        out.println("<head>");
        out.println("<title>Servlet RegLoginServletHW2</title>");
        out.println("</head>");
        out.println("<body>");
        out.println("<form id=login_reg name=login_registration method=post action=CatServletHW2>");
        out.println("<table width=400 border=1 cellpadding=0 cellspacing=0>");
        out.println("<tr><td colspan=2 class=title bgcolor=339900>Log in / Register Account Infomation <td></tr>");
        out.println("<tr width=150 border=1 bgcolor=99ff66><td>Requested user name </td>" +
                "<td ><input type=text name=userName /></td></tr>");
        out.println("<tr width=150 border bgcolor=99ff66><td>Password </td>" +
                "<td ><input type=password name=password/></td></tr>");
        out.println("<tr><td colspan=2 class=title bgcolor=339900>For new user's account, confirm password </td></td></tr>");
        out.println("<tr width=150 border=1 bgcolor=99ff66><td>Confirm password </td>" +
                "<td class=r_table><input type=password name=password_Conf /></td></tr>");
        out.println("<tr><td colspan=2 bgcolor=339900 ><div align=center class=text_click>" +
              "<input type=submit name=Submit value=Submit />" +
              "<input type=reset name=Submit2 value=Reset />" +
            "</div></td></tr>");
        out.println("</table>");
        out.println("</body>");
        out.println("</html>");
         
        out.close();
    }
    

}
    Tags: None
    • r035198x
      MVP
      • Sep 2006
      • 13225
      #2
      ... and what is the question?

        Comment

        • judge82
          New Member
          • Jul 2007
          • 24
          #3
          I wan create a session that when one logs in it will say "weclome 'username'" in the welcome page

            Comment

            • r035198x
              MVP
              • Sep 2006
              • 13225
              #4
              Originally posted by judge82
              I wan create a session that when one logs in it will say "weclome 'username'" in the welcome page
              You have to pardon my extreme ignorance but my pyschic powers elude me when I don't have Rooibos tea.

              So where are you specifically stuck with? Did you try your code and it gave you errors/exceptions/wrong results?

                Comment

                • judge82
                  New Member
                  • Jul 2007
                  • 24
                  #5
                  ok. the first code I wrote (below), when you click submit it takes you to the next page, but I want to have a session that can say "welcome username" in that new page. so in the first code i posted (above), I am struggling to insert a session that will do that.

                  Code:
                  package TestWebApp;

import java.io.*;
import java.net.*;

import javax.servlet.*;
import javax.servlet.http.*;

/**
 *
 * @author Administrator
 * @version
 */
public class RegLoginServlet extends HttpServlet {
    
    /** Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        
        out.println("<html>");
        out.println("<head>");
        out.println("<title>Servlet RegLoginServletHW2</title>");
        out.println("</head>");
        out.println("<body>");
        out.println("<form id=login_reg name=login_registration method=post action=CatServletHW2>");
        out.println("<table width=400 border=1 cellpadding=0 cellspacing=0>");
        out.println("<tr><td colspan=2 class=title bgcolor=339900>Log in / Register Account Infomation <td></tr>");
        out.println("<tr width=150 border=1 bgcolor=99ff66><td>Requested user name </td>" +
                "<td ><input type=text name=userName /></td></tr>");
        out.println("<tr width=150 border bgcolor=99ff66><td>Password </td>" +
                "<td ><input type=password name=password/></td></tr>");
        out.println("<tr><td colspan=2 class=title bgcolor=339900>For new user's account, confirm password </td></td></tr>");
        out.println("<tr width=150 border=1 bgcolor=99ff66><td>Confirm password </td>" +
                "<td class=r_table><input type=password name=password_Conf /></td></tr>");
        out.println("<tr><td colspan=2 bgcolor=339900 ><div align=center class=text_click>" +
              "<input type=submit name=Submit value=Submit />" +
              "<input type=reset name=Submit2 value=Reset />" +
            "</div></td></tr>");
        out.println("</table>");
        out.println("</body>");
        out.println("</html>");
         
        out.close();
    }

                    Comment

                    • r035198x
                      MVP
                      • Sep 2006
                      • 13225
                      #6
                      You have gone through a tutorial on sessions?

                        Comment

                        • judge82
                          New Member
                          • Jul 2007
                          • 24
                          #7
                          Originally posted by r035198x
                          You have gone through a tutorial on sessions?
                          no. do you know where I can get a good one?

                            Comment

                            • r035198x
                              MVP
                              • Sep 2006
                              • 13225
                              #8
                              Originally posted by judge82
                              no. do you know where I can get a good one?
                              You know what? You don't need to manually create a session for a log in process. Just create your log in HTML or JSP page and submit that to the servlet. A session is automatically created for you then.

                              P.S I don't know a good sessions tutorial but you should have Sun's J2EE tutorial. It's available free for download.

                                Comment

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