在控制器之间传递表单反馈以重新显示表单错误消息时出现问题 [英] Problems passing form feedback between controllers to re-display a form error message

问题描述

控制器A显示一些数据并显示一个表单.

Controller A shows some data and displays a form.

该表单提交给控制器B.

The form submits to Controller B.

在控制器B中发现表单错误时，需要由控制器A重新显示该表单.

When form errors are found in Controller B, the form needs to be re-displayed by Controller A.

要执行此操作，需要在控制器A中添加return redirect "blah".

To do this requires a return redirect "blah" in Controller A.

要使用重定向将错误传递回控制器A，我可以在模型中设置错误消息:

To pass the errors back to Controller A using a redirect, I can set the error message in the model:

model.put("errormsg", "look what happened");

这具有将错误消息的整个文本放入URL中的烦人作用:

This has the annoying effect of putting the entire text of the error message into the URL:

/controllera/somemethod?errormsg=look+what+happened

但是，即使我在URL上看到了文本，当我尝试从JSTL中显示该文本时，也没有显示任何内容:

However, even though I see the text on the URL, when I try to display it from the JSTL, nothing is shown:

<c:out value="${errormsg}"/>

是否有更好的方法来解决所有这些问题?

Is there a better approach to all of this?

推荐答案

是否有更好的方法来解决所有这些问题?

Is there a better approach to all of this?

恕我直言，更好的方法是使用标准方案:控制器A显示表单，将数据提交给控制器A，如果发生错误，则控制器A显示错误.如果数据有效的控制器A确实重定向到控制器B.

IMHO better approach is to use standard scheme: controller A shows form, data submitted to controller A and if error occurs controller A display errors. If data valid controller A do redirect to controller B.

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