❮ Jstl Function Contains Jsp File Uploading ❯

fn:length() Function

The fn:length() function returns the length of a string or the number of elements in a collection.

Syntax

The syntax for the fn:length() function is as follows:

${fn:length(collection | string)}

Example Demonstration

The following example demonstrates the functionality of this function:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
<html>
<head>
<title>Using JSTL Functions</title>
</head>
<body>

&lt;c:set var="string1" value="This is first String."/>
&lt;c:set var="string2" value="This is second String." />

<p>String Length (1) : ${fn:length(string1)}</p>
<p>String Length (2) : ${fn:length(string2)}</p>

</body>
</html>

The output is as follows:

String Length (1) : 21

String Length (2) : 22

JSP Standard Tag Library

❮ Jstl Function Contains Jsp File Uploading ❯