Question

我正在使用Spring并向控制器发送复选框值。它工作正常，直到我添加了enctype =＆＃34; multipart / form-data＆＃34;至。现在，当我取消选中复选框时，我收到一条错误说＆＃34;映射到复选框的字节值不能为空＆＃34;。我错过了什么？

JSP：

<form:form modelAttribute="ad" method="post" class="form-horizontal" autocomplete="off" id="add-ad-form" 
    action="?${_csrf.parameterName}=${_csrf.token}" enctype="multipart/form-data">
            <div class="form-group">
        <label for="adContact.phoneText" class="col-sm-2 control-label">Text Me</label>
        <div class="col-sm-5">
          <form:checkbox path="adContact.phoneText" value="1" />
        </div>
    </div>

Spring生成html为：

      <input id="adContact.notifyMe1" name="adContact.notifyMe" value="1" checked="checked" type="checkbox">
      <input name="_adContact.notifyMe" value="on" type="hidden">

控制器：

@RequestMapping(value = "/ad/adAdd3/{categoryId}", method = RequestMethod.POST)
public String postAdAdd(@RequestParam("categoryId") int categoryID,
        @ModelAttribute("ad") @Valid Ad ad, BindingResult aaResult,
        RedirectAttributes attr, SessionStatus aaStatus,
        Principal aaPrincipal) {

    if (aaResult.hasErrors()) {
        attr.addFlashAttribute("org.springframework.validation.BindingResult.ad", aaResult);
        attr.addFlashAttribute("ad", ad);
        return "redirect:/ad/adAdd3/" + categoryID;
    } else {
        ad = this.caService.saveAd(ad, categoryID,
                ((UserDetailsImpl) ((Authentication) aaPrincipal)
                        .getPrincipal()).getUser());

        aaStatus.setComplete();
        return "redirect:/ad/adDetail/" + ad.getId();
    }
}

Answer 1

添加此代码解决了我的问题。

当enctype =＆＃34; multipart / form-data＆＃34;

1 个答案: