public class ExamViewController extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse resp) {
String email = req.getParameter("email");
try {
ExamModel em = new ExamModel(email);
HttpSession s = req.getSession();
s.setAttribute("exam", em);
req.getRequestDispatcher("/exams.jsp").forward(req, resp);
} catch (ServletException e) {
e.printStackTrace();