JSTL Function fn:substring Example

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Last Updated on 30 August 2019   |   Print  Email


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

The fn:substring function returns a substring from a string provided begin and end index.

 

JSTL <fn:substring> Syntax:

${fn:substring(<string>, <beginIndex>, <endIndex>)}

 

JSTL <fn:substring> Example:

The following JSP code extracts a substring from a string based on begin and end index values.

<%@ 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:substring Demo</title>
  </head>
  <body>
    <h1>fn:substring Demo</h1>
    <c:set var="text" value="CodeJava.net is great source of information."/>
    <c:set var="website" value="${fn:substring(text, 0, 12)}" />
    Full Text: <strong><c:out value="${text}"/></strong><br/><br/>
    Substring Text (start index 0 - end index 12):  
    <strong><c:out value="${website}"/></strong><br/><br/>	
  </body>
</html>

 

Output:

JSTL function fn-substring

 

Other JSTL Function Tags:

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


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is certified Java programmer (SCJP and SCWCD). He started programming with Java in the time of Java 1.4 and has been falling in love with Java since then. Make friend with him on Facebook and watch his Java videos you YouTube.



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