Table of Contents:

1. Introduction to JSTL Functions
2. JSTL Functions Reference and Examples
3. Sample Project – JSTL-Functions-Reference Structure
4. Downloads

 

Introduction to JSTL Functions

JSTL Functions allow to do common tasks like searching for a string in another string, checking whether a particular string starts or ends with a specified string or finding out an index of a string within another string etc. To use JSTL Functions we need to include JSTL Functions tag library in our JSP as shown below:

<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn"%>

The following section discusses about JSTL Functions in details along with working examples.

 

JSTL Functions Reference and Examples

fn:contains	fn:containsIgnoreCase	fn:endsWith	fn:escapeXml
fn:indexOf	fn:join	fn:length	fn:replace
fn:split	fn:startsWith	fn:substring	fn:substringAfter
fn:substringBefore	fn:toLowerCase	fn:toUpperCase	fn:trim

 

Sample Project – JSTL-Functions-Reference Structure

The sample Eclipse project contains all the working code examples from this article. If you have downloaded and deployed the JSTL-Functions-Reference .war file, the starting point would have been index.jsp. You can access the index.jsp by the URL http://localhost:8080/JSTL-Functions-Reference/index.jsp assuming you’ve deployed the .war file to a container like Tomcat.

Once the web application is deployed, up and running, you can click on each link to see the working example of the individual JSTL functions. 

All the JSP files demonstrating JSTL functions are organized into the folder jstl-functions. The project structure is shown below:

Downloads:

Please download the Eclipse sample project with working code examples and deployable .war file from the downloads section.

 

Other JSTL Tutorials:

• Introduction to JSP Standard Tag Library (JSTL)
• JSTL Tags Reference