JSP Database Connection JSP Standard Tag Library (JSTL)

JSTL fn:contains() function

The fn:contains() function is used to determine whether a string contains a specified substring.

fn:contains() function syntax is as follows:

Syntax

<c:if test="${fn:contains(<original string>, <substring to be searched>)}">
...
</c:if>

Example Demonstration

The following example demonstrates the function 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>
<c:set var="theString" value="I am from w3codebox"/>
<c:if test="${fn:contains(theString, 'w3codebox')}>
　　　<p>Found w3codebox<p>
</c:if>
<c:if test="${fn:contains(theString, 'w3codebox')}>
　　　<p>Found w3codebox<p>
</c:if>
</body>
</html>

The running results are as follows:

Found w3codebox

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JSTL fn:contains() function

fn:contains() function syntax is as follows:

Example Demonstration