import javax.servlet.*; import javax.servlet.http.*; import java.io.*; import java.util.*; // This servlet demonstrates how we can forward information to // other servlets, and include the output of other servlets in // responses. This servlet acts as a login servlet, which checks // for a correct password before the rest of the request is processed. public class LoginServlet extends HttpServlet { public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { PrintWriter out = response.getWriter(); // Get the name and password entered. Normally, we would // check this against a database, but for now we will just // check whether the password is a particular value. String name = request.getParameter("name"); String password = request.getParameter("password"); if (password.equals("12345")) { // The password is correct, so forward the request to the // existing ReservarionServlet. Note that the structure // of the call assumes that the ReservationServlet is in // the same directory of the web container as this one. RequestDispatcher correctLogin = request.getRequestDispatcher("ReservationServlet1"); correctLogin.forward(request, response); } else { // Otherwise, we send an error message, and include the // original login page so the user can try again. out.println("

INCORRECT PASSWORD!!

"); RequestDispatcher badLogin = request.getRequestDispatcher("reservation.htm"); badLogin.include(request, response); } } }