public UserEditBean() {
   HttpServletRequest request =
       (HttpServletRequest) FacesContext.getCurrentInstance().getExternalContext().getRequest();
   if (request.getParameter("id") != null) {
     int userId = Integer.valueOf(request.getParameter("id"));
     Session session = HibernateUtil.getSession();
     UserDAO dao = new UserDAO(session);
     user = dao.findByID(userId);
   }
 }
 public String save() {
   Session session = HibernateUtil.getSession();
   UserDAO dao = new UserDAO(session);
   dao.update(user);
   return "/admin/user/list?faces-redirect=true";
 }