CODEWITHSUNDEEP
springjsp
Jérémy Moray
Jérémy Moray

Reputation: 15

Session attribute in JSP template

I have a session attribute which is an HashMap and representing a shopping cart.

I would like to get the HashMap size in the template to make something like "Shopping cart (4 items)" in the nav bar.

Is there a way to achieve this without adding the HashMap size in every Model of every Controller?

Upvotes: 0

Views: 47

Answers (1)

Erfan Ahmed
Erfan Ahmed

Reputation: 1613

use jstl funtion along with core tag -

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>

Then you can get size of any map or list by this -

<c:set var="cartMapSize" value="${fn:length(yourMap)}"/>

Now you can access cartMapSize anywhere in your page like this -

${cartMapSize}

In your case this would look like this -

Shopping cart (${cartMapSize} items)

Upvotes: 1

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