How to add JSTL to Maven?

I know the question is old, but it's high in the Google results, so I'm adding this.

Newer JSTL version are available (only) under org.glassfish.web groupId. Example:

<dependency>
    <groupId>org.glassfish.web</groupId>
    <artifactId>javax.servlet.jsp.jstl</artifactId>
    <version>1.2.5</version>
</dependency>

If you are looking for the Jakarta EE version:

<dependency>
    <groupId>org.glassfish.web</groupId>
    <artifactId>jakarta.servlet.jsp.jstl</artifactId>
    <version>2.0.0</version>
</dependency>

As Balus said, you just need to add JSTL to your pom.xml because Tomcat doesn't include it. 1.2 is the most recent version:

<dependency>
   <groupId>javax.servlet</groupId>
   <artifactId>jstl</artifactId>
   <version>1.2</version>
</dependency>

You must include the jstl library in your distribution. This may be provided by the container, although that is not recommended practice. The maven dependency for the current version (as of writing) is here:

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>

Although, it's always worth checking the maven central repository for updates.

<!-- standard.jar --> 
<dependency>
    <groupId>taglibs</groupId>
    <artifactId>standard</artifactId>
    <version>1.1.2</version>
</dependency>

<!-- JSTL --> 
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.1.2</version>
</dependency>

And then you can use the Java Standart Tags and Functions as follows in your jsp page:

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

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

This also works alone:

<dependency>
    <groupId>jstl</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>