打开第二个JSP时，您必须将相关参数(我认为是ID)作为GET参数传递给第二页.也就是说，表格中的链接应如下所示:

When opening the 2nd JSP you have to pass the relevant parameters (an ID I suppose) as GET parameters to the second page. That is, the link in your table should look like:

<a href="edit.jsp?itemId=${item.id}" />

然后，您可以在第二页上使用request.getParameter("itemId")读取该参数.

Then you can read that parameter with request.getParameter("itemId") on the second page.

(如果不使用JSTL和EL，则将${..}替换为<%= .. %>)

(if not using JSTL and EL, the ${..} is replaced by <%= .. %>)