private void showProjectsFromCategory(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
categoryId = Integer.valueOf(req.getParameter("categoryId"));
req.setAttribute("categoryName", category.getCategoryList().get(categoryId - 1));
req.setAttribute("projectsFromCategory", project.getProjectFromCategory(categoryId).values());
req.getRequestDispatcher("projects.jsp").forward(req, resp);
}
