funtion.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"

pageEncoding="UTF-8"%>

<%@ taglib prefix="fn" uri="http://jakarta.apache.org/tomcat/functions"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<title>EL function demo</title>

</head>

<body>

To reverse "Hello, world!": "${fn:reverse("Hello, world!")}",

<br />

The length of "Hello, world!" is ${fn:getStringSize("Hello, world!")}.

</body>

</html>