我有一个带有搜索框的网站。我想在用户单击搜索而不输入任何文本时验证搜索框。他应该收到一条错误消息，但我收到以下错误：
java.lang.IllegalStateException：Bean 名称“searchForm”的 BindingResult 和普通目标对象都不能用作请求属性
我的表格如下：
<blc:form th:action="@{/search}" th:object="${searchForm}" method="POST">
<input type="search" class="search" name="q" th:value="${originalQuery}" />
<span th:if="${#fields.hasErrors('searchText')}" th:errors="*{searchText}">dddd</span>
<input type="submit" id="search_button" value="go" />
</blc:form>
我的控制器如下：
@Controller
@RequestMapping("/search")
public class SearchController extends Mysearchcontroller {
@RequestMapping("")
public String search(HttpServletRequest request, HttpServletResponse response,
@RequestParam(required = false) String q,@ModelAttribute("mysearchForm") Mysearchform mysearchForm,BindingResult errors,Model model) throws ServletException, IOException, ServiceException {
return search3(model, request,response, q ,errors);
}
}