protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		if (!request.getParameterMap().isEmpty()) {
			List<String> fouten = new ArrayList<>();
			try {
				long docentNr = Long
						.parseLong(request.getParameter("docentNr"));
				Docent docent = docentService.read(docentNr);
				if (docent == null) {
					fouten.add("Docent niet gevonden");
				} else {
					request.setAttribute("docent", docent);
				}
			} catch (NumberFormatException ex) {
				fouten.add("Tik een getal");
			}
			if (!fouten.isEmpty()) {
				request.setAttribute("fouten", fouten);
			}
		}
		request.getRequestDispatcher(VIEW).forward(request, response);
	}