Archive for February, 2011

Getting a Request Parameter Using JSTL in a JSP Page

Thursday, 17 February, 2011 Leave a comment

When using the JSTL’s expression language (see Enabling the JSTL Expression Language in a JSP Page), the request parameters are made available in the implicit object param. This example demonstrates how to include the value of a request parameter from the query string or posted data in the generated output:

<%-- Declare the core library --%>
<%@ taglib uri="/WEB-INF/tld/c.tld" prefix="c" %>

    <c:when test="${empty}">
        Please enter your name.
        Hello <b><c:out value="${}" /></b>!

If the page was accessed with the URL:
the resulting output would be:
Hello UserName!

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