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JSTL fn:join() Function


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The fn:join() function concatenates all the elements of an array into a string with a specified separator.

Syntax:

The fn:join() function has following syntax:

String join (java.lang.String[], java.lang.String)

Example:

Following is the example to explain the functionality of this function:

<%@ 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="string1" value="This is first String."/>
<c:set var="string2" value="${fn:split(string1, ' ')}" />
<c:set var="string3" value="${fn:join(string2, '-')}" />

<p>Final String : ${string3}</p>

</body>
</html>

Note: fn:split() function returns an array splitting into diffrenet elements.

This would produce following result:

Final String : This-is-first-String.


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