RoleRouterServlet.java

package com.login;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.*;

@WebServlet("/roleRouter")
public class RoleRouterServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        HttpSession session = request.getSession(false);

        if (session == null || session.getAttribute("role") == null) {
            response.sendRedirect("login.jsp");
            return;
        }

        String role = (String) session.getAttribute("role");

        switch (role) {
            case "buyer":
                response.sendRedirect("LoadFilters");
                return;
            case "seller":
                response.sendRedirect("sellerHome.jsp");
                return;
            case "admin":
                response.sendRedirect("adminDashboard.jsp");
                return;
            case "rep":
                response.sendRedirect("repDashboard.jsp");
                return;
            default:
                response.sendRedirect("login.jsp");
                return;
        }
    }
}