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How to Session Tracking in JSP Servlet

 Disable the login page after a user has successfully logged in, you can use session tracking in your servlet and JSP application. Here are the steps to follow:

1. Create a Servlet that handles the login request: This Servlet should authenticate the user’s credentials and create a session for the user upon successful login.
2. Set a session attribute to indicate that the user is logged in: You can set a session attribute to indicate that the user is logged in. For example, you can set a boolean attribute called “loggedIn” to true.
3. Check the session attribute in the login page: In your login page, check for the “loggedIn” session attribute. If it is present and set to true, redirect the user to a different page, such as the home page.

Here is some sample code to help you get started:

LoginServlet to handle the login request:

Java Servlet Code

public class LoginServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String username = request.getParameter("username");
String password = request.getParameter("password");
// validate user credentials 
if (isValidUser(username, password)) {
// create a new session
HttpSession session = request.getSession(true);
session.setAttribute("loggedIn", true); 
session.setAttribute("username", username); 
session.setAttribute("role", getUserRole(username)); 
response.sendRedirect("home.jsp"); 
} 
else { 
response.sendRedirect("login.jsp"); 
 }
}
 private boolean isValidUser(String username, String password) {
 // validate user credentials against a user database 
}
 private String getUserRole(String username) {
 // get the user's role from a user database
 }
}

In your login.jsp page, check for the “loggedIn” session attribute:

JSP Page

<% if (session.getAttribute("loggedIn") !=null&&(Boolean)session.getAttribute("loggedIn")) { 
      response.sendRedirect("home.jsp"); 
   } 
%>

This code checks whether the “loggedIn” session attribute is present and set to true. If it is, it redirects the user to the home page.

Note that this is just a simple example to illustrate the basic idea. You can modify and extend the code to suit your specific needs.

About Post Author

Gaurav Dixit

dgaurav300@gmail.com

http://blog.softhubsolution.com

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