fn:indexOf() JSTL Function

fn:indexOf() JSTL Function Example explains about How To Use fn:indexOf() JSTL Function inside JSP.

Consider an example string where you need to find the first occurrence of a specified substring.

fn:indexOf() returns the index within a string of the first occurrence of a specified substring.

int indexOf(java.lang.String, java.lang.String)
you can see the below example, which is demonstrating fn:indexOf() JSTL Function 
Required Libraries

You need to download

  1. Tomcat 9
  2. JSTL 1.2

Following jar must be in classpath

  1. jstl-1.2.jar

fn:indexOf() Example

// Use Of JSTL fn:indexOf(String String) tag

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn"%>
<title>JSTL fn:indexOf() Example</title>

	// you can also set the values into request scope same as using c:set
	// request.setAttribute("str", "This is a Test String");

	<c:set var="str" value="This is a Test String" />
	${fn:indexOf(str, "Test")}



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