BigDecimal在小数点后有2个分数？

Question

I'd like to have a BigDecimal formatted with 2 decimals after the decimal point. Always.

Based on some boolean checks, I sometimes return a BigDecimal.ZERO; In this case, the JSF page just displays "0", although I set <f:convertNumber minFractionDigits="2" maxFractionDigits="2"/> .

I do not understand this, but nevertheless how can I enforce 2 digits else?

Answer 1

there are 2 ways of doing this

you can use the built in BigDecimal function

myBigDecimal.SetScale(2, RoundingMode.HALF_UP);

This returns a big decmial with 2 digits past the decimal and also rounds up.(there are also other rounding methods)

OR

you could use jsf convertNumber Tag

<f:convertNumber maxFractionDigits="2" minFractionDigits="2" />

Answer 2

Try formatting the number like this:

    <h:outputText value="#{myBean.bd1}">
        <f:convertNumber pattern="0.00" />
    </h:outputText>

Note: Please also pay attention to the warnings regarding to rounding in the accepted answer.

Answer 3

试试吧

<af:convertNumber maxIntegerDigits="3" maxFractionDigits="2"   minFractionDigits="2" pattern="###.##" />