JSTL fn:trim() Function

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The fn:trim() function removes white space from both ends of a string.

Syntax:

The fn:trim() function has following syntax:

java.lang.String trim(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         "/>
<p>String (1) Length : ${fn:length(string1)}</p>

<c:set var="string2" value="${fn:trim(string1)}" />
<p>String (2) Length : ${fn:length(string2)}</p>
<p>Final string : ${string2}</p>

</body>
</html>

This would produce following result:

String (1) Length : 29
String (2) Length : 20
Final string : This is first String


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