JSTL fn:trim() function

The JSTL fn:trim() function returns the input string after removing the all white spaces from both ends of the string.
Syntax: String trim(String inputString)

Example:

test.jsp
<%@ 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>fn:trim JSTL function example</title>
 </head>
 <body>
  <c:set var="testString" 
                 value="   Hello this is a JSTL function example.  "/>
  Given String: <br/>
  <c:out value="${testString}" /><br/><br/>
  String after trim:<br/>
  <c:out value="${fn:trim(testString)}" />
 </body>
</html>
web.xml
<web-app>
 
  <welcome-file-list>
          <welcome-file>test.jsp</welcome-file>
  </welcome-file-list> 
 
</web-app>

Output:


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