本文介绍了如何在表单提交之间保留 ModelMap?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
限时送ChatGPT账号..我在 ModelMap
中添加了一个 Map
,它包含一个下拉列表,当表单初始化时我正在填充 ModelAttribute:
I am adding to the ModelMap
a Map
which contains a list to go on a drop down an I am populating the ModelAttribute when the form initialises:
@RequestMapping(method = RequestMethod.GET)
public String initForm(HttpServletRequest httpRequest, ModelMap model)
{
model.addAttribute("myList", myMap);
return "MyForm";
}
它按预期工作,但是当用户提交表单时,此列表将从地图中丢失.
It works as expected however when the user submits the form this list is lost from the map.
@RequestMapping(method = RequestMethod.POST, value ="/dosearch")
public String processSearch(... ModelMap model)
{
.....
return new ModelAndView("MyForm",model);
上述方法不起作用.
如何在表单提交之间保留地图?
How can I prserve the map between form submits?
推荐答案
没有.在这里,即使是 flash 范围也无济于事,因为您没有使用后重定向.以下是选项:
No. Even a flash scope won't help you here, because you are not using redirect-after-post. Here are the options:
以html形式输出所有值,然后将它们提交到/dosearch
,您就可以从请求中获取它们使用会话来存储值(更糟糕的选择)
output all values in the html form, then they will be submitted to /dosearch
and you'll be able to get them from the request
use the session to store the values (worse option)
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