JSTL Function fn:startsWith Example

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Last Updated on 30 August 2019   |   Print  Email



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

The fn:startsWith function tests whether a given string starts with a given prefix. This function returns boolean value.

 

JSTL <fn:startsWith> Syntax:

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

            ...

</c:if>

 

 

JSTL <fn:startsWith> Example:

The following code example searches for a prefix www in the string www.codejava.net.

 

<%@ 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:startsWith Demo</title>
  </head>
  <body>
	<h1>fn:startsWith Demo</h1>
	<c:set var="stringToSearch"
		value="www.CodeJava.net" />
	<c:out value="${stringToSearch}"/>
	<c:if test="${fn:startsWith(stringToSearch, 'www')}">
		<p>www.CodeJava.net starts with www</p>
	</c:if>	
  </body>
</html>

 

Output:

JSTL function fn-startsWith

 

Other JSTL Function Tags:

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


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