I am having problems creating login session with java Servlet.

24 New Member

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

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 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();

    }
 
}

Sep 26 '07 #1

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2207

r035198x

13,262

MVP

... and what is the question?

Sep 26 '07 #2

judge82

New Member

I wan create a session that when one logs in it will say "weclome 'username'" in the welcome page

Sep 26 '07 #3

r035198x

13,262

MVP

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?

Sep 26 '07 #4

judge82

New Member

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.

Expand|Select|Wrap|Line Numbers

 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();

    }

Sep 26 '07 #5

r035198x

13,262

MVP

You have gone through a tutorial on sessions?

Sep 26 '07 #6

judge82

New Member

You have gone through a tutorial on sessions?

no. do you know where I can get a good one?

Sep 26 '07 #7

r035198x

13,262

MVP

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.

Sep 27 '07 #8

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