JSTL Function fn:contains Example

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Last Updated on 31 August 2019   |   Print  Email


This post helps you understand how to use the <fn:contains> tag in the JSTL function tags library with code example.

The fn:contains function tests whether a given string is contained in another string. This function returns boolean value.

 

JSTL <fn:contains> Syntax:

<c:if test="${fn:contains(<var containing source string>, <string to search>)}">

...

</c:if>

 

 

JSTL <fn:contains> Example:

The following JSP code searches for "Code Java" in a given string value.

 

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn"%>
<html>
 <head>
  <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
  <title>fn:contains Demo</title>
 </head>
 <body>
    <h1>fn:contains Demo</h1>
    <c:set var="stringToSearch"
        value="CodeJava.net is a great source of information." />
    <c:out value="${stringToSearch}"/>
    <c:if test="${fn:contains(stringToSearch, 'CodeJava')}">
        <p>The above sentence contains CodeJava</p>
    </c:if>
    
 </body>
</html>

 

Output:

JSTL function fn-contains

 

Other JSTL Function Tags:

containsIgnoreCase  |  endsWith |  escapeXml  |  indexOf  |  join  |  length  |  replace  |  split  |  startsWith  |  substring  |  substringAfter  |  substringBefore  |  toLowercase  |  toUpperCase  |  trim


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