java - 在spring mvc应用中提交输入类型="date"

Question

我想将“日期”类型的输入提交给 spring mvc Controller 。不幸的是，我不断收到许多错误。我是 spring mvc 的新手，尤其是表单提交，我不太清楚为什么我需要在表单中包含“commandName”。

到目前为止我的代码:

后台.jsp:

<form:form method="POST" action="/getAllOnDate" commandName="date">
<table>
    <td><form:label path="date">Date</form:label></td>
    <td><form:input type="date" path="date"/></td>
    <input type="submit" value="View all on date"/>
</table>
</form:form>

Controller :

@RequestMapping(value = "/backoffice", method = RequestMethod.GET)
public String backofficeHome(Model model) {
    model.addAttribute("date", new Date());

    return "backoffice";
}

@RequestMapping(value = "/getAllOnDate", method = RequestMethod.POST)
public String getAllReservationsForRestaurantOnDate(@ModelAttribute("date") Date date, Model model) {
   LOG.info(date.toString());
   return "anotherPage";
}

Answer 1

您必须在 Controller 中使用@InitBinder 才能直接绑定(bind)日期:

Spring automatically binds simple data (Strings, int, float, etc.) into properties of your command bean. However, what happens when the data is more complex for example, what happens when you want to capture a String in “Jan 20, 1990” format and have Spring create a Date object from it as part of the binding operation. For this work, you need to inform Spring Web MVC to use PropertyEditor instances as part of the binding process :

@InitBinder
public void bindingPreparation(WebDataBinder binder) {
  DateFormat dateFormat = new SimpleDateFormat("MMM d, YYYY");
  CustomDateEditor orderDateEditor = new CustomDateEditor(dateFormat, true);
  binder.registerCustomEditor(Date.class, orderDateEditor);
}

现在您可以直接在您的方法中获取解析日期，格式为 "MMM d, YYYY":

@RequestMapping(value = "/getAllOnDate", method = RequestMethod.POST)
public String getAllReservationsForRestaurantOnDate(@ModelAttribute("date") Date date, Model model) {
   LOG.info(date.toString());
   return "anotherPage";
}