验证后如何显示数据？

Question

我有一份注册表格：

regStore.jsp

<form:form id = "storeRegForm" method="POST" action="/regStoreSuccessful" commandName="storeForm">
<h3>Registration store</h3>
  <table>
  <tr>
    <td><form:label path="name">Store name</form:label></td>
    <td><form:input path="name" /></td>
    <td><form:errors path="name" /></td>
  </tr>
  <tr>
    <td><form:label path="storeType.id">Store type</form:label></td>
    <td><form:select path="storeType.id" >
      <form:options items="${typeList}" itemValue="id" itemLabel="name"/>
    </form:select></td>
    <td><form:errors path="storeType.id" /></td>

  </tr>
  <tr>
    <td><form:label path="address">Store address</form:label></td>
    <td><form:input path="address" /></td>
    <td><form:errors path="address" /></td>
  </tr>
  <tr>
    <td colspan="2">
      <input type="submit" value="Register"/>
    </td>
  </tr>
</table>

并且在我的控制器中还有两种方法（GET，POST）：

控制器

@RequestMapping(value = "/regStore", method = RequestMethod.GET)
public ModelAndView addStore() throws SQLException {
    ModelAndView modelAndView = new ModelAndView("Store/regStore");

    modelAndView.addObject("storeForm", new Store());
    modelAndView.addObject("typeList", storeTypeService.getAllTypes());
    return modelAndView;
}

@RequestMapping(value = "/regStoreSuccessful", method = RequestMethod.POST)
public ModelAndView addStorePost(@Valid @ModelAttribute("storeForm") Store storeForm, BindingResult bindingResult) throws SQLException {
    ModelAndView modelAndView = new ModelAndView("redirect:body");

    if(bindingResult.hasErrors()) {
        modelAndView.addObject("storeForm", storeForm);
        modelAndView.addObject("typeList", storeTypeService.getAllTypes());
        return new ModelAndView("Store/regStore");
    }

    storeService.addStore(storeForm);
    return modelAndView;
}

在我的模型中，注释，像这样：

@NotEmpty(message = "Name of store can't be empty")
private String name;

另外客户端验证：

<script type="text/javascript">
$(document).ready(function () {
$(".registration #storeRegForm").validate({
  rules: {
    name: "required",
    address : "required"
  },
  messages: {
    name: "Name isn't be null",
    address : "Address isn't be null"
  }
});
});
</script>

如果我用jQuery注释掉代码验证（客户端验证），并且我的表单字段将为空，则开始工作服务器端验证，但是在服务器端验证之后，在表单中没有显示存储类型的列表，更多显示在图像中：

谢谢！

Answer 1

问题非常简单，在if块中，您将数据填入预定义的modelAndView，然后返回不同的实例！

if(bindingResult.hasErrors()) {
    modelAndView.addObject("storeForm", storeForm);
    modelAndView.addObject("typeList", storeTypeService.getAllTypes());
    // !!!!!!
    return new ModelAndView("Store/regStore");
}