JSP Database Connection JSP Standard Tag Library (JSTL)

JSTL fn:length() function

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

Syntax

fn:length() function syntax is as follows:

${fn:length(collection  |  string)}

Example Demonstration

The following example demonstrates the 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>
<c:set  var="string1"  value="This  is  first  String."/>
<c:set  var="string2"  value="This  is  second  String."　/>
<p>String Length (1)  :  ${fn:length(string1</p>/p>
<p>String Length (2)  :  ${fn:length(string2</p>/p>
</body>
</html>

The running result is as follows:

String Length (1)  :　21
String Length (2)  :　22

JSP Standard Tag Library

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JSTL fn:length() function

Syntax

Example Demonstration