没有。不幸的是，Request对象只有在页面加载完成后才可用 - 一旦完成，你将丢失其中的所有值，除非它们已被存储在某处。

No. Unfortunately the Request object is only available until the page finishes loading - once it's complete, you'll lose all values in it unless they've been stored somewhere.

如果你想要通过以下任何一个请求保留属性：

If you want to persist attributes through requests you need to either:

1. 在表单中有一个隐藏的输入，例如&lt ; input type =hiddenname =myhiddenvaluevalue =<％= request.getParameter（value）％> /&GT; 。然后，它将作为请求参数在servlet中可用。


2. 将它放入会话中（参见 request.getSession（） - 在JSP中，这只是 session ）

1. Have a hidden input in your form, such as <input type="hidden" name="myhiddenvalue" value="<%= request.getParameter("value") %>" />. This will then be available in the servlet as a request parameter.
2. Put it in the session (see request.getSession() - in a JSP this is available as simply session)

我建议使用会话因为它更容易管理。

I recommend using the Session as it's easier to manage.