I'm following a tutorial about spring and I'm supposed to set a variable in a controller in order to be printed within the jsp rendering the request. The code is as follows:
@Controller
public class HelloController {
@RequestMapping(value="/hello.htm")
public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String now = (new Date()).toString();
return new ModelAndView("WEB-INF/views/hello.jsp", "now", now);
}
}
Then, the hello.jsp code is as follows:
<%@ page session="true"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<html>
<body>
<p>Greetings, it is now <c:out value="${now}" /></p>
</body>
</html>
I am expected to get an html showing this:
Greetings, it is now Mon Fri Dec 06 00:39:35 CET 2013
But all I get is:
Greetings, it is now ${now}
I've checked everything twice (or even more!) but everything seems to be as the tutorial says but there must be something missing, I hope...
What's wrong with my code?
This is an E xpression L anguage issue. Your ${} is not being resolved. This can happen for a number of reasons. One, and the most likely, is that your web.xml is declaring Servlet 2.3 and under. You'll have to specify 2.4+. Now, obviously, your Servlet container must also support that higher version.
Change this - the pad a library is bad:
<!-- %@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>-->
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
来源：https://stackoverflow.com/questions/20413260/jstl-cout-not-showing-the-variables-value