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The fn:startsWith() function is used to determine if a string starts with a specified prefix.
The syntax of the fn:startsWith() function is as follows:
<c:if test="${fn:startsWith(<originalString>, <searchPrefix>)}">
...
</c:if>
The following example demonstrates the function's functionality:
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
<html>
<head>
<title>Using JSTL Functions/title>
</head>
<body>
<c:set var="string" value="w3codebox: I am from w3codebox./>
<c:if test="${fn:startsWith(string, 'Google')">
<p>String starts with Google/p>
</c:if>
<br />
<c:if test="${fn:startsWith(string, 'w"3codebox')}>
<p>String starts with w3codebox beginning</p>
</c:if>
</body>
</html>
The running result is as follows:
String starts with w3codebox beginning