Custom JSTL tags

To add custom tags to your JSP page, create the tag file and put it in the Java project folder WebContent > WEB-INF > tags

In this example, we create a tag that can be used to escape user-inputted values for display on the next page.

escape.tld

<?xml version="1.0" encoding="ISO-8859-1" ?>
<taglib xmlns="http://java.sun.com/xml/ns/j2ee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
    http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
  version="2.0">

  <description>
    calls StringEscapeUtils.escapeHtml for value
  </description>
  <tlib-version>1.0</tlib-version>
  <short-name>escape</short-name>
  <uri>escape</uri>
    <function>
      <name>esc</name>
      <function-class>org.apache.commons.lang.StringEscapeUtils</function-class>
      <function-signature>
        java.lang.String escapeHtml( java.lang.String )
      </function-signature>
    </function>
</taglib>

In the JSP page

<%@ taglib uri="escape" prefix="es" %>

${es:esc(param.home)}