Ceiling of a number in JSTL/EL

jsp jstl el ceil
Tiny picture Tiny · Jul 31, 2012 · Viewed 18.8k times · Source

In JSTL,

<fmt:formatNumber value="${1.6}" type="number" pattern="#"/>

returns 2 and the following 

<fmt:formatNumber value="${1.4}" type="number" pattern="#"/>

returns1 and I need 2, a ceiling of a number.

Is there a direct way to achieve this in JSTL (or the only way to do so is by using an appropriate custom tag)?

Answer

BalusC picture BalusC · Jul 31, 2012

The default rounding mode of DecimalFormat that is used by <fmt:formatNumber> is RoundingMode.HALF_EVEN. There is no way to change that via any tag attribute. Just add 0.5 to the value when it's not an odd integer to make it to behave like RoundingMode.CEILING.

<fmt:formatNumber value="${bean.number + (bean.number % 1 == 0 ? 0 : 0.5)}" 
    type="number" pattern="#" />

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