Posts Tagged ‘jstl’
Getting a Request Parameter Using JSTL in a JSP Page
Thursday, 17 February, 2011
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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:choose> <c:when test="${empty param.name}"> Please enter your name. </c:when> <c:otherwise> Hello <b><c:out value="${param.name}" /></b>! </c:otherwise> </c:choose>
If the page was accessed with the URL:
http://hostname.com/mywebapp/mypage.jsp?name=UserName
the resulting output would be:
Hello UserName!
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