public class AccountFormController extends SimpleFormController {
  ...
  private PetStoreFacade petStore;

  public AccountFormController() {
    setSessionForm(true);
    setValidateOnBinding(false);
    setCommandName("accountForm");
    setFormView("EditAccountForm");
  }

  public void setPetStore(PetStoreFacade petStore) {
    this.petStore = petStore;
  }

  protected Object formBackingObject(HttpServletRequest request)
  throws Exception {
    UserSession userSession = (UserSession)WebUtils.
              getSessionAttribute(request, "userSession");
    if (userSession != null) {
    return new AccountForm(this.petStore.getAccount(userSession.
        getAccount().getUsername()));
    }
    else {
      return new AccountForm();
    }
  }

  protected void onBindAndValidate(HttpServletRequest request, 
     Object command, BindException errors)
      throws Exception {

    AccountForm accountForm = (AccountForm) command;
    Account account = accountForm.getAccount();

    if (request.getParameter("account.listOption") == null) {
      account.setListOption(false);
    }
    if (request.getParameter("account.bannerOption") == null) {
      account.setBannerOption(false);
    }

    errors.setNestedPath("account");
    getValidator().validate(account, errors);   
    errors.setNestedPath("");

    ...
   }

  protected Map referenceData(HttpServletRequest request) throws Exception {
    Map model = new HashMap();
    model.put("languages", LANGUAGES);
    //model.put("categories", this.petStore.getCategoryList());
    return model;
  }

  protected ModelAndView onSubmit(
  HttpServletRequest request, HttpServletResponse response, 
             Object command, BindException errors)throws Exception {
    ...
  }
}