How to init a JSP

[Antonio Merighi <me...@mail.eng.it>]

I would like to know how to set init parameters to a JSP.
I saw that for servlets there is the web.xml  in WEB-INF,
but I don't know how to use it for a jsp that it isn't under
WEB-INF, but it's in jsp directory, like the snoop.jsp in
"example" context.
I tried to write a web.xml file like:

<web-app>
    <servlet>
        <servlet-name>
            snoop.jsp
        </servlet-name>
        <jsp-file>
            /examples/jsp/snoop.jsp
        </jsp-file>
        <init-param>
            <param-name>
                file
            </param-name>
            <param-value>
                /usr/local/etc/jsp/jsp.properties
           </param-value>
        </init-param>
    </servlet>
</web-app>

but it seems it didn't like it.
Where are my mistakes?
Thanks.
Antonio

Re: XML File format

[Laird Nelson <lj...@unix.amherst.edu>]

Brill Pappin wrote:
> I mean, why use this format:
> <init-param>
>               <param-name>file</param-name>
>               <param-value>/usr/local/etc/jsp/jsp.properties</param-value>
> </init-param>
> 
> rather than this format?:
> <init-param name="file" value="/usr/local/etc/jsp/jsp.properties"/>

The second does not permit multiple param-values, for one.

Cheers,
Laird

XML File format

[Brill Pappin <br...@jmonkey.com>]

Quick question:
Why was the XML file set up the way it was?

I mean, why use this format:
<init-param>
              <param-name>file</param-name>
              <param-value>/usr/local/etc/jsp/jsp.properties</param-value>
</init-param>

rather than this format?:
<init-param name="file" value="/usr/local/etc/jsp/jsp.properties"/>

The second seems much cleaner to me... and is clearer to read when perusing
the file.


- Brill Pappin
  www.jmonkey.com

Re: How to init a JSP

[Gunther Schadow <gu...@aurora.rg.iupui.edu>]

your init-param thing seems fine to me, however, you may encounter
a whitespace problem here, I'm not sure.

To remember:

(1) the init-param element repeats for each parameter

(2) try this instead

         <init-param>
             <param-name>file</param-name>
             <param-value>/usr/local/etc/jsp/jsp.properties</param-value>
         </init-param>

(3) However, I have no idea why/how you can use the snoop.jsp file
as a servlet. Why do you need init parameters for a jsp page? I
don't understand this, but it doesn't mean it's wrong.

(4) If you have a real servlet, you should have something like

      <servlet>
        <servlet-name>myservlet</servlet-name>
        <servlet-class>org.myorg.mypack.MyServlet</servlet-class>
	<!-- init parameters here -->
      </servlet>

      <servlet-mapping>
	 <servlet-name>myservlet</servlet-name>
	 <url-pattern>/myservlet</url-pattern>
      </servlet-mapping>

The servlet mapping element turned out to be important for me so that
the servlet would be activated through

	URL: http://myhost.org/myservlet

of course you have to make sure that the apache.conf and the server.xml
files also know about your web-app context.

regards
-Gunther


Antonio Merighi wrote:
> 
> I would like to know how to set init parameters to a JSP.
> I saw that for servlets there is the web.xml  in WEB-INF,
> but I don't know how to use it for a jsp that it isn't under
> WEB-INF, but it's in jsp directory, like the snoop.jsp in
> "example" context.
> I tried to write a web.xml file like:
> 
> <web-app>
>     <servlet>
>         <servlet-name>
>             snoop.jsp
>         </servlet-name>
>         <jsp-file>
>             /examples/jsp/snoop.jsp
>         </jsp-file>
>         <init-param>
>             <param-name>
>                 file
>             </param-name>
>             <param-value>
>                 /usr/local/etc/jsp/jsp.properties
>            </param-value>
>         </init-param>
>     </servlet>
> </web-app>
> 
> but it seems it didn't like it.
> Where are my mistakes?
> Thanks.
> Antonio
> 
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