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Conditional includes

Mike Curwen

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Posts: 3695

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posted 18 years ago

So here is what I'd like to be able to do:
This of course, doesn't work.

In english: I need to retrieve a parameter and depending on that parameter, fill in an area of my page with one of five different pages. I am probably missing the easiest solution, because right now I just can't see how to do this sort of thing, but it obviously has to be possible!

Maky Chopra

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Posts: 149

posted 18 years ago

Try this..

Mike Curwen

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posted 18 years ago

I had not thought of that, and I think I once wrote ASP pages like this... but here is what it gave me:

But another problem, even if this did work. Doesn't this approach assume that JSP's get processed in a 'dual pass' mode. One pass would have to be for the 'if' selection part, and the second part would actually have to do the jsp:include.

Mike Curwen

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Posts: 3695

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posted 18 years ago

Well, that was the right suggestion with one modification. It needed the { and } braces.
What confused me about the 'dual pass', is that I forgot that the jsp:include tag gets translated by the JSP compiler into actual java code that gets the requestdispatcher etc, etc... and that all three conditions are actually compiled into the servlet, but of course only one of them gets performed at request-time, based on that variable. I was thinking that the JSP compiler would take the <jsp:include....> tag and turn it into an out.println("<jsp:include...>"); but of course this doesn't happen, because it's outside the <% %>'s.

Thanks for the help.

Maky Chopra

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Posts: 149

posted 18 years ago

You beat me to the punch.. most welcome

Bruce Jin

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Posts: 672

posted 15 years ago

Thanks for the tip.
I got conditional including jsp working.

BJ - SCJP and SCWCD
We love Java programming. It is contagious, very cool, and lot of fun. - Peter Coad, Java Design

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Karthikeyan Dharmarajan

Greenhorn

Posts: 7

posted 15 years ago

test

Kathy Sierra

Cowgirl and Author

Posts: 1589

posted 15 years ago

I think you could also do this with a JSTL tag, if you want to avoid scripting

cheers,
Kathy

p.s. I edited this to keep the colon: and o from turning into THIS guy

So... there is NOT supposed to be a space between the ":" and "o" in the <c: otherwise> Anyone know how to disable the graemlins?

Thanks!
[ June 24, 2004: Message edited by: Kathy Sierra ]

Co-Author of Head First Design Patterns
Just a Jini girl living in a J2EE world.

Jeroen Wenting

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Posts: 5093

posted 15 years ago

There's a nice little checkbox on the bottom of the page just above the lower "Add Reply" button labelled "Disable smilies in this post." that will disable smilies

Bruce Jin

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Posts: 672

posted 15 years ago

Thanks Kathy for the tip.
This thread started 3 years ago and technology has advanced since then!
The tag solution is better I think.

BJ - SCJP and SCWCD
We love Java programming. It is contagious, very cool, and lot of fun. - Peter Coad, Java Design

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Karthikeyan Dharmarajan

Greenhorn

Posts: 7

posted 15 years ago

test

Karthikeyan Dharmarajan

Greenhorn

Posts: 7

posted 15 years ago

Originally posted by Bruce Jin:
Thanks Kathy for the tip.
This thread started 3 years ago and technology has advanced since then!
The tag solution is better I think.

test

Karthikeyan Dharmarajan

Greenhorn

Posts: 7

posted 15 years ago

Originally posted by Bruce Jin:
Thanks Kathy for the tip.
This thread started 3 years ago and technology has advanced since then!
The tag solution is better I think.

========
test

With a little knowledge, a cast iron skillet is non-stick and lasts a lifetime.

Conditional includes

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