HttpSession session = request.getSession();
HttpSession session = request.getSession(true);
	public ActionForward execute(		ActionMapping mapping,		ActionForm form,		HttpServletRequest request,		HttpServletResponse response)		throws Exception {										HttpSession session = request.getSession();//	TODO: No futuro os periodos (semestres) devem ser lidos da base de dados.		if (session != null) {// TODO:			 No futuro, os tipos de salas devem ser lidos da BD 			ArrayList types = new ArrayList();			types.add(new LabelValueBean("Escolher", null));			types.add(new LabelValueBean("1 semestre", "1"));			types.add(new LabelValueBean("2 semestre", "2"));			session.setAttribute("publico.semester", types);						return mapping.findForward("Sucess");		} else			throw new Exception(); 		}