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From Anthony Cunningham <anthony...@om.asahi-kasei.co.jp>
Subject Re: Forward to JSP from Servlet
Date Fri, 16 May 2003 09:47:11 GMT
whether or not this is a good or correct solution what I did was create a file
called Global.jsp and include that at the top of all the other jsp files.
In there I set a variable to the webappname and use that variable everywhere
then if the webapp name changes i just change it there
you could also put a lot of your headers and stuff thats common to all jsps in
there too.

if you change this though the changes are not picked up by tomcat, you have to
resave any jsps that use it or delete tomcats work folder

Daryl Handley wrote:

> Right you are. Thanks.
>
> What is the suggested alternative ? I would like to make everything relative
> (to something). I have come up with 2 solutions.
>
> 1. Hard code the name of my web app into the jsp pages.
>    ie <IMG SRC="/MyApp/jsp/images/myImage.gif">
>
>    not really a good idea in my opinion since as soon as you change the
>    name of the web app you have to go through all the JSPs and make changes.
>
> 2. Get the servlet context within the JSP and prepend
>    that to the URL with the relative path based on the root for the web app.
>    ie <IMG src="<%= getServletContext().getRealPath(
>                 "/jsp/images/SepRight.gif") %>">
>
>    Guaranteed to work all the time, but makes your JSPs harder to read.
>
> Any other reccomendations ?
>
> BTW, I checked back on some of the code I wrote for Websphere just to make
> sure I wasn't going crazy. I wasn't, it was written how I originally stated
> (the resources were relative to the location of the JSP file). Am I right to
> assume that this was a "feature" in the Websphere server, that does not
> conform to the Java specs ?
>
> -----Original Message-----
> From: news [mailto:news@main.gmane.org]On Behalf Of Bill Barker
> Sent: Thursday, May 15, 2003 8:36 PM
> To: tomcat-user@jakarta.apache.org
> Subject: Re: Forward to JSP from Servlet
>
> Nope, the problem is that you are confusing the h*ll out of the browser.
> The browser has no knowledge at all that you've done a forward, so it will
> request relative links for things like stylesheets and images against the
> URL that it sent.  It doesn't know or care about the URL that you forwarded
> to.
>
> You can stay with this design, but you'd have to make all of the references
> to stylesheets and images absolute in your JSP page (e.g. <img
> src="/myapp/images/cool.jpg"> instead of <img src="images/cool.jpg">).
>
> "Daryl Handley" <darylhandley72@yahoo.com> wrote in message
> news:FNEJIOJHLIMDDBPLEEHBKEKDCAAA.darylhandley72@yahoo.com...
> > Hi all,
> >
> > When I forward to a JSP from a servlet, my JSP page is unable to find the
> > resources (stylesheets, images, ....)it needs to display the page
> properly.
> > The page comes up fine if I just type in the address of the JSP ...
> >
> > localhost/OnlineStore/jsp/index.jsp for example
> >
> > ... but if I forward to the page ....
> >
> > getsServletContext().getRequestDispatcher("/jsp/index.jsp").forward(req,
> > res);
> >
> > ... it comes up with no stylesheets applied and none of my images are
> > visible.
> >
> > I tried doing a res.sendRedirect and it worked fine (as I expected it
> too).
> > I don't really want to use sendRedirect unless I have to since it has it's
> > own problems.
> >
> > I'm assuming this has something to do with the servlet that is compiled
> from
> > the jsp assuming the resources are going to be somewhere different, but
> I'm
> > not really sure. I'm fairly new to Tomcat, but I used to do these kinds of
> > forwards all the time using Websphere with no problem. Maybe there is some
> > setting somewhere that I need to adjust ?
> >
> > Tomcat is v4.1.24
> >
> >
> > TIA
> > Daryl
>
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