如何知道另一个JSP文件是否包含在内？

Question

I have x.jsp that can either be served as the whole response, or being included in several other jsp files.

So how can I know inside x.jsp if it is being included by another file or not?

Answer 1

You can check the value of the attribute javax.servlet.include.request_uri in your x.jsp page. If set, the jsp page was included.

Further details here: Java HttpServletRequest get URL in browsers URL bar

Answer 2

你可以在'其他文件'中有一个隐藏字段，如果你包含x.jsp你应该为它设置一个值，当你想知道它包括你应该检查隐藏字段是否value == 'value'时，在x.jsp value == 'value' 。

Answer 3

If x.jps have knowledge about inclusion, it means that some best practices is ignored:

• MVC pattern is thrown away because your x.jsp is not just a view , but also some kind of controller .
• Possibly the Single responsibility principle is broken. Try split x.jsp to y.jsp and z.jsp , or introduce a variable which will contain value for appropriate case
• It possibly increases coupling because x.jsp needs additional data about enviroment.

Of course these practices are not mandatory but you need a strong reason why you ignore them.

Please give us more information about your case or rephrase you question

Edit

My answer is abstract as your question is abstract. Get us your jsp, what should be changed and I hope you get better answer.