CODEWITHSUNDEEP
jspjstlel
hoanvd1210
hoanvd1210

Reputation: 147

Error using EL in JSP

I used El , but it is not valid . I get an error : javax.el.ELException: Cannot convert 1 of type class java.lang.String to class java.lang.Long . 1 is count.

     <h3>My Shopping</h3>
            <c:set var="count" value=" ${sessionScope.cart.count}" />
            ${count}
             <%--
            <c:set var="cart" value="${sessionScope.cart}" />
            <c:set var="count" value=" ${sessionScope.cart.count}" />
            <br/>
            <c:if test="${count < 1}"  >    
                No Product in your cart
            </c:if>
            <c:if test="${count > 0}">
                <c:set var="listCart" value="${sessionScope.cart.cart}" />

Upvotes: 2

Views: 6810

Answers (1)

BalusC
BalusC

Reputation: 1108722

This exception suggests that the ${count} is a String, not a Long (or Integer, that would also work).

Provided that the count property of the cart bean in the session scope is already of the right type, then the only cause which I can see in the code posted so far is that there's a dangling leading space before the value. 

<c:set var="count" value=" ${sessionScope.cart.count}" />
<!-- ---------------------^                           -->

This effectively makes it a String value of " 1" which is obviously not a valid number. Removing that offending space should fix the problem.

Upvotes: 3

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