There are three classes of scripting elements: declarations, scriptlets and
expressions (JSP 2.0 adds a fourth: EL expressions):
<%! declaration %>
<% scriptlet %>
<%= expression %>
<%@ taglib ... %> and <%@ tag ... %> are directives, which are quite distinct
from scriptlets. Just because you're using XML notation (JSP documents),
doesn't mean that scriptlets are implicitly disallowed:
<jsp:scriptlet>...</jsp:scriptlet>
With JSP 2.0, you can use <scripting-invalid> in web.xml to disable non-EL
scripting:
<jsp-config>
<jsp-property-group>
<url-pattern>*.jsp</url-pattern>
<scripting-invalid>true</scripting-invalid>
</jsp-property-group>
...
</jsp-config>
JSP 2.0 also provides the ability to define implicit includes (operates like the
include directive):
<jsp-config>
<jsp-property-group>
<url-pattern>*.jsp</url-pattern>
<include-prelude>/WEB-INF/taglibs.jspf</include-prelude>
<include-coda>/WEB-INF/footer.jspf</include-coda>
</jsp-property-group>
...
</jsp-config>
Finally, AFAIK <jsp:directive.taglib> is not part of the JSP spec. It may have
been part of a draft for JSP 1.2 but I don't think it made the final cut
(someone correct me on that if I'm off-base). For JSP documents, xmlns
attributes are used to declare which taglibs are being used.
Quoting Steve Lewis <[EMAIL PROTECTED]>:
> Help -
> My jsp files all use the same set of about a half dozen tag declarations
> Rather than place them at the top of every page I start every page with the
> declaration
> <jsp:directive.include file="/include/b17StartJSP.inc" />
> b17StartTile.inc
> does some housekeeping and at some point includes /include/b17StartTile.inc
> which does more housekeepiong and includes
> declareTags.inc which looks like this:
> <jsp:directive.taglib uri="http://java.sun.com/jstl/core"; prefix="c" />
> ... more tags
> and some jsp taglibs
> <jsp:directive.taglib tagdir="/WEB-INF/tags/formpatterns" prefix="fm" />
>
> under resin there is no problem with this and under tomcat 5 I get
>
>
> org.apache.jasper.JasperException: /HelloStruts.jsp(1,1)
> /include/b17StartJSP.inc(2,3) /include/b17StartTile.inc(1,4)
> /include/declareTags.jsp(3,18) <jsp:directive.tag directive can only be
> used in a tag file
>
> 1) I never use the tag directive outside of custim tag files but I do use
> jsp:directive.taglib
> 2) I would expect that included files would inherit the extension of the
> including page (ultimately jsp)
> 3) I tried changing include/declareTags.inc to include/declareTags.jsp (as
> shown above) without success
> 4) I am reluctant to use <@ tag and <%@ taglib notation because I am trying
> to ban scriptlets from ant page and use the curresponding XML notation
>
> ANy ideas and suggestions -
> Because other containers support what I am doing I believe I am doing the
> right thing
>
>
>
> Steven M. Lewis PhD
> 4221 105th Ave NE
> Kirkland, WA 98033
> 425-889-2694
> 206-384-1340 (cell)
--
Kris Schneider <mailto:[EMAIL PROTECTED]>
D.O.Tech <http://www.dotech.com/>
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