springMVC中controller之前执行的方法

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   @ModelAttribute()
   public void getSessionUser() throws IOException, ServletException {
       HttpSession session = getSession();
       if (getLoginInfoFromSession()==null) {
           session.setMaxInactiveInterval(60*60);
           HttpServletRequest request = getRequest();
           String userId = request.getParameter("userId");
           String roleType = request.getParameter("roleType");
           if(userId==null||roleType==null){
               request.getRequestDispatcher(request.getContextPath() + "/pages/error/500.html").forward(request, getResponse());
//               getResponse().sendRedirect(request.getContextPath() + "/pages/error/500.html");
               return;
           }
           List<AdminUser> adminUserList = adminUserService.getListByProperty("loginId",userId);

               LoginInfo loginInfo = new LoginInfo();
               AdminUser adminUser = adminUserList.get(0);
               if(adminUser.getSupplier()!=null&&AdminUser.ROLE_TYPE_SUPPLIER.equals(roleType)){
                   loginInfo.setSupplierId(adminUser.getSupplier().getId());
                   loginInfo.setSupplierName(adminUser.getSupplier().getSupplierName());
               }
               loginInfo.setRoleType(roleType);
               loginInfo.setAdminUser(adminUser);
               session.setAttribute(SESSION_LOGIN_INFO, loginInfo);
       }
   }

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