response.setContentType("text/html;charset=UTF-8");
        String name=request.getParameter("userName");
        char gender=request.getParameter("gender").charAt(0);
        int password=Integer.parseInt(request.getParameter("password"));
        float balance=Float.parseFloat(request.getParameter("balance"));

        Student s = new Student(name,gender,password,balance);
        ServletContext context = getServletContext();
        List source=(List)context.getAttribute("data");
        source.add(s);
        try (PrintWriter out = response.getWriter()) {
            out.print("Registration done. Login to proceed!<br><br>");
            request.getRequestDispatcher("login.jsp").include(request, response);
        }