仅查看petclinic示例应用程序，并尝试学习表单处理。

似乎表单映射到实体1：1是正确的吗？还有其他需要完成的配置吗，还是spring会知道所有表单输入都映射到实体，因为那是在GET请求中添加到模型的内容？

@Controller
@RequestMapping("/owners/*/pets/{petId}/visits/new")
@SessionAttributes("visit")
public class AddVisitForm {

    private final Clinic clinic;


    @Autowired
    public AddVisitForm(Clinic clinic) {
        this.clinic = clinic;
    }

    @InitBinder
    public void setAllowedFields(WebDataBinder dataBinder) {
        dataBinder.setDisallowedFields("id");
    }

    @RequestMapping(method = RequestMethod.GET)
    public String setupForm(@PathVariable("petId") int petId, Model model) {
        Pet pet = this.clinic.loadPet(petId);
        Visit visit = new Visit();
        pet.addVisit(visit);
        model.addAttribute("visit", visit);
        return "pets/visitForm";
    }

    @RequestMapping(method = RequestMethod.POST)
    public String processSubmit(@ModelAttribute("visit") Visit visit, BindingResult result, SessionStatus status) {
        new VisitValidator().validate(visit, result);
        if (result.hasErrors()) {
            return "pets/visitForm";
        }
        else {
            this.clinic.storeVisit(visit);
            status.setComplete();
            return "redirect:/owners/" + visit.getPet().getOwner().getId();
        }
    }

}