JSTL Round off/down number
This (below) should be the only safe way to do it. pattern="##" is not well supported, minIntegerDigits="2" is easier and cleaner.
<c:set var="minutes" value="${fn:substringBefore(seconds div 60, '.')}"/>
<fmt:formatNumber var="seconds" minIntegerDigits="2" value="${ seconds - (minutes*60) }"/>
user1386375
Updated on June 04, 2022Comments
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user1386375 almost 2 years
This might be a dumb question, but let's say I have a variable
seconds
in my JSP page and its value is 779. Now I want to convert it into minutes and seconds by doing the following:<c:set var="${seconds / 60}" value="min"/> <c:set var="${seconds mod 60}" value="sec">
This way I get min = 12.983333 and sec = 59.0.
Now I want to merge the two and display the result as 12:59. The problem I am facing is that
min
keeps getting rounded up to 13. I have tried many things, such as:<fmt:parseNumber var="minutes" integerOnly="true" type="number" value="${min}" /> <fmt:formatNumber type="number" pattern="###" value="${min}" var="minutes" /> fn:substringBefore(min, '.') maxFractionDigits="0" // and so on...
But all of them just return 13 consistently. I am a bit clueless at this point. But I may have missed something. I hope someone here has an idea, or a hint, about what might be wrong.
-edit
The code below made it work in the end. I have no clue what was wrong, since its also working with "/" now. Maybe some minor mistake elsewhere. Nevertheless thanks a lot for your time :) Kudos!
<c:set var="min" value="${fn:substringBefore((seconds div 60), '.')}"/> <fmt:formatNumber var="sec" pattern="##" value="${seconds mod 60)}"/>
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Ankur about 11 yearsHi, this doesn't work for me,
<c:set var="min" value="${29 div 10}" />
gives me 2.9 -
asgs over 7 years
fn:substringBefore
is the way to go. Thanks!