本来想在opencms项目中构建MVC结构的架构，当使用forward转发页面时，总是返回空白页。
查阅了好多资料才发现官方文档给出了说明：
What about?using <jsp:forward page="..." /> with OpenCms?
Again, the short answer is:? It currently doesn't work in OpenCms, so don't use it.?You should consider using the OpenCms tablib (or scriptlet API) to achieve your results.
The long answer is: As described above, OpenCms loads any JSP with an internal requestDispatcher("{file.jsp}").include()?call. It expects to get the control back after that include call. This?is not the case when you use <jsp:forward /> , as the final page will terminate the request. This currently causes the JSP integration in OpenCms to break. We hope to provide that feature in a future OpenCms release. Note that the filename adjustment issue described above also applies to the forward tag.
意思就是目前在opencms中根本不能用 forward。
我的解决方案是：
建立一个类，在其中使用属性表明其作用域（request or session），然后把这一对象存放在session中传递，使用sendRedirect转发页面。如果作用域表明：request，则在获得这一对象后在session中移除该对象。