@RequestMapping("/server.jsp")
  public ModelAndView serverInfo() {
    List<User> moderators = userDao.getModerators();

    ModelAndView mv = new ModelAndView("server");
    mv.getModel().put("moderators", moderators);

    List<User> correctors = userDao.getCorrectors();

    mv.getModel().put("correctors", correctors);

    return mv;
  }