JSTL fn:trim() Function

JSTL Trim function is used to remove white space from the start and end of the String. The fn:trim() function removes white space from both ends of a string.

The fn:trim() function has following syntax:
java.lang.String trim(java.lang.String)


Following is the example to explain the functionality of this function:
<%@ page language="java" contentType="text/html; charset=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" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>JSTL Trim Function Example</title>
 <c:out value="${fn:trim(' Hello ')}"></c:out>

Output: Hello

As you can see above, JSTL Trim Function takes ' Hello ' string as an input parameter and remove the white space from it and will return 'Hello' as a result.

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