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


About the Author:

is certified Java programmer (SCJP and SCWCD). He began programming with Java back in the days of Java 1.4 and has been passionate about it ever since. You can connect with him on Facebook and watch his Java videos on YouTube.



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