Thanks Mark. That does help.
On Mon, 2017-04-10 at 23:24 +0100, Mark Thomas wrote:
> On 10/04/17 16:35, Tim Watts wrote:
> > Environment: Tomcat 7.0.59; JRE 1.8.0_72
> >
> > I suspect the answer to my problem is "You can't do that" but here goes:
> >
> > A simple JSP that tries to get a Calendar instance and outputs the year:
> >
> > <%@ page language="java"
> > contentType="text/html;
> > charset=UTF-8" pageEncoding="UTF-8"%>
> > <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core; %>
> >
> >
> >
> >
> >
> > The year is ${ Y }
> >
> >
> >
> > This presents a page that just says "The year is" but no year value. Is
> > there some syntactical mojo I'm missing or is my best alternative to
> > resort to a scriptlet?
> >
> > (And for context, I actually want to do something along these lines in a
> > tag file.)
>
> You can do something like that but...
>
> You'll need EL 3.0 which means Tomcat 8 minimum. I recommend 8.5.x in
> preference to 8.0.x.
>
> EL doesn't let you specify the package in the expression. You have to
> explicitly import. With Tomcat, if you import the class into the JSP
> page that automatically imports it into the EL expression. (Whether
> Tomcat should do this or not is an open question with the EL Expert Group.)
>
> Then factor in that EL only lets you reference static methods and fields
> on concrete classes (which means you can't use Calendar since it is
> abstract) and you get:
>
>
> <%@ page language="java"
> import="java.util.Calendar,java.util.GregorianCalendar"
> contentType="text/html;charset=UTF-8"
> pageEncoding="UTF-8"%>
> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core; %>
>
>
>
>
>
> The year is ${ Y }
>
>
>
>
> Drop the above test into a JSP page in the examples web application in
> Tomcat 8 onwards and you'll get the output you are looking for.
>
> Note I tested this with 9.0.x but 8.x should behave the same way.
>
> HTH,
>
> Mark
>
> -
> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
> For additional commands, e-mail: users-h...@tomcat.apache.org
>
-
To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
For additional commands, e-mail: users-h...@tomcat.apache.org