How to define a global page when requested page or method is not found?

Question

I know how to fine a global error redirect page in our defined package when exception encountered that just by adding the following configuration in the parent package in struts.xml:

<global-results>
    <result name="error">/error.jsp</result>
</global-results>

<global-exception-mappings>
    <exception-mapping exception="java.lang.Exception" result="error" />
</global-exception-mappings>

But It seems to not able to catch those exceptions like requested resources, methods, pages are not found, I mean how to catch the struts2-level errors, and then I can do something to handle it.

http://stackoverflow.com/questions/10313279/struts-2-how-to-redirect-exceptions-of-type-exception-to-a-particular-page-bu — Aniket Kulkarni, Aug 29 '13 at 07:03
I can catch the my action's exceptions, but cannot catch struts2's own exception like requested pages is not found. — Brady Zhu, Aug 29 '13 at 07:06
ohh! that you can configure in action's result tag. If result is input or error give page `error.jsp` — Aniket Kulkarni, Aug 29 '13 at 07:09
See this http://stackoverflow.com/q/16293143/1700321 and http://stackoverflow.com/q/12795634/1700321. — Aleksandr M, Aug 29 '13 at 08:07

score 2 · Accepted Answer · answered Aug 29 '13 at 07:48

2

You should define your unknown handler in the struts.xml. Unknown handlers are called by the framework, when an unknown action, result, or method are executed.

<bean type="com.opensymphony.xwork2.UnknownHandler" name="handler" class="com.package.SomeUnknownHandler"/>

The class should implement UknownHandler interface to handle the cases:

when an action configuration is unknown
when a result cannot be found for an action and result code
when an action method cannot be found

answered Aug 29 '13 at 07:48

Roman C

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Thanks for pointing me a mind. And now the question I get is how should I implement the UnknownHandler interface, what logic should I do? throw a exception, or return the related object for redirect the URL I handle it?? – Brady Zhu Aug 29 '13 at 09:36
It's up to you, actions usually redirect to known action, results to known result, method to known method. – Roman C Aug 29 '13 at 10:19
1

Ok, Thanks. UknownHandler is exactly provides us a interface to catch these unknown cases and do the appropriate handlings, right? – Brady Zhu Aug 30 '13 at 01:19

score 0 · Answer 2 · edited May 23 '17 at 12:15

0

Here some detaiks a how you can use the UknownHandler (https://stackoverflow.com/a/27881698/3383543), enjoy.

edited May 23 '17 at 12:15

Community

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answered Jan 10 '15 at 22:09

Ahmad AlMughrabi

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How to define a global page when requested page or method is not found?

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