December 2003
Intermediate to advanced
764 pages
24h 58m
English
Content preview from JavaServer Pages, 3rd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Function Elements
Functions used in EL expressions are mapped to static methods in a
Java class using any number of <function>
elements after the <tag-file> elements, if
any. As with the other main elements, a number of nested elements
define the details: <description>,
<display-name>,
<icon>, <name>,
<function-class>,
<function-signature>, and
<example>.
The optional <description>,
<display-name>, and
<icon> elements can be used to describe the
function in the same way as for all other items.
The mandatory <name> element contains the
function name. Each function must have a unique name within the tag
library.
The name of the class that contains the implementation of the
function is specified by the mandatory
<function-class>
element as a fully qualified class name
(i.e., including the package name).
The mandatory
<function-signature>
element specifies the function
parameters and return type in the format
returnType
functionName(parameterType,
...), e.g.:
java.lang.String truncate(java.lang.String, int)
The optional nested <example> element is
used the same as in all other elements.
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.