如何解决如何通过休眠验证器在Spring控制器中验证@SessionAttribute对象？
如何验证会话属性对象？ 我正在使用HttpSession创建一个酒店预订Web应用程序，以在请求之间存储数据。 用户填写完所有信息后，将通过邮寄请求将其发送，并且必须在后端进行验证。 以下代码行导致错误：
@SessionAttribute("reservationDto") @Valid ReservationDto reservation,BindingResult result
错误如下：
java.lang.IllegalStateException: An Errors/BindingResult argument is expected to be declared immediately after the model attribute,the @RequestBody or the @RequestPart arguments to which they apply: public java.lang.String pl.maciejdluzen.hotelreservation.controllers.ReservationController.createReservation(pl.maciejdluzen.hotelreservation.dtos.ReservationDto,org.springframework.validation.BindingResult,pl.maciejdluzen.hotelreservation.dtos.CardDetailsDto,org.springframework.ui.Model)
我想BindingResult对象不能以@SessionAttribute("reservationDto") @Valid ReservationDto reservation开头，那么如何验证来自reservationDto的{{1}}方法中的所有信息？
请查看我的整个控制器：
createReservation还有@Controller
@RequestMapping("/")
@SessionAttributes("reservationDto")
public class ReservationController {
private Logger LOG = LoggerFactory.getLogger(getClass());
private final HotelService hotelService;
private final GuestService guestService;
public ReservationController(HotelService hotelService,GuestService guestService) {
this.hotelService = hotelService;
this.guestService = guestService;
}
@GetMapping
public String home(Model model) {
model.addAttribute("hotelsNames",hotelService.findAllHotelsNames());
model.addAttribute("reservationDto",new ReservationDto());
return "index";
}
@PostMapping("reservation/roomselection")
public String getRoomSelectionPage(@modelattribute("reservationDto") ReservationDto reservationDto,HttpSession session,Model model) {
ReservationDto reservation = (ReservationDto) session.getAttribute("reservationDto");
LOG.info("Hotel Name form the session: {} and session id {} and creation time: {},checkin {} ",reservation.getHotelName(),session.getId(),session.getCreationTime(),reservation.getCheckInDate());
model.addAttribute("reservationDto",reservation);
return "reservation/roomselection";
}
@GetMapping("auth/guest/reservation/details")
public String getReservationDetailsPage(
@SessionAttribute("reservationDto") ReservationDto reservation,HttpServletRequest request,Principal principal,Model model) {
String param = request.getParameter("roomType");
reservation.setRoomTypeName(param);
reservation.setUsername(principal.getName());
LOG.info("Username: {}",reservation.getUsername());
reservation.setGuestName(guestService.findGuestNameByUsername(reservation.getUsername()));
model.addAttribute("reservationDto",reservation);
model.addAttribute("cardDetails",new CardDetailsDto());
LOG.info("Hotel Name form the session: {},roomType {} and session id {} and creation time: {},checkin {} and username {}",reservation.getRoomTypeName(),reservation.getCheckInDate(),principal.getName());
return "reservation/details";
}
@PostMapping("auth/guest/reservation/details")
public String createReservation(@SessionAttribute("reservationDto") @Valid ReservationDto reservation,BindingResult result,@modelattribute("cardDetails") @Valid CardDetailsDto cardDetails,BindingResult result2,Model model) {
if(result2.hasErrors() || result.hasErrors()) {
return "reservation/details";
}
LOG.info("Reservation: {}",reservation.getGuestName());
LOG.info("CardDetails: {}",cardDetails.getCardNumber());
return "redirect:/auth/guest/reservation/summary";
}
@GetMapping("/auth/guest/reservation/summary")
public String getReservationSummary() {
return "reservation/summary";
}
}
类：
ReservationDto所有建议都将受到欢迎！
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