JSTL will coerce it into an integer if you assign it this way:
<c:set var="lastPageNo" value="${1}"/>
According to the JSTL spec any value="sometext" will always be a string. Using the ${} makes JSTL evaluate it and decide you have an integer there.
Francois Beausoleil wrote:
Hi !
I have a slight problem. I am building a paged results browser, and I have a problem with my next action.
The root of the problem is because JSTL thinks that some values are strings, and not numbers.
The code I am running is: <fmt:formatNumber var="lastPageNo" value="${numberOfContacts / count}" minFractionDigits="0" maxFractionDigits="0"/> <c:if test="${numberOfContacts le count}"> <c:set var="lastPageNo" value="1"/> </c:if> <c:if test="${(numberOfContacts gt count) and ((numberOfContacts mod count) ne 0)}"> <c:set var="lastPageNo" value="${lastPageNo + 1}"/> </c:if>
pageNo: <c:out value="${pageNo}"/> pageNo.class: <c:out value="${pageNo.class}"/> lastPageNo: <c:out value="${lastPageNo}"/> lastPageNo.class: <c:out value="${lastPageNo.class}"/> pageNo lt lastPageNo: <c:out value="${pageNo lt lastPageNo}"/>
This code does arithmetics on the numbers in some cases, and when these run, everything is fine. *But*, when the arithmetic operations do not run, I get the following in my comment block: pageNo: 2 pageNo.class: class java.lang.String lastPageNo: 13 lastPageNo.class: class java.lang.String pageNo lt lastPageNo: false
As you can see, JSTL considers both pageNo and lastPageNo to be strings. I finally resolved my problem by switching to a choose, and adding an otherwise block that adds 0 with lastPageNo, converting to a number.
All of this boils down to: is there the equivalent of a Java cast in JSTL ? If there were, I could simply cast my pageNo and lastPageNo when doing my tests, and everything would be fine.
Thanks for any help ! Fran�ois Developer of Java Gui Builder http://jgb.sourceforge.net/
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