How to combine positive and negative decimal in JSTL?

Question

I have two numbers that I need to round to 4 decimal places in JSTL. One positive:

40.7615811 40.7616 

and another negative:

 -73.9940841 -73.9941 

Both should be rounded to 4 decimal places, as in the second line of each example.

Is there a clean way to do this in JSTL or do I need to do this in a controller class or in a JSP script?

Answer 1

You can use the formatNumber tag in the fmt namespace ( http://java.sun.com/jsp/jstl/fmt ).

for instance

 <%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %> <fmt:formatNumber value="${foo}" pattern="0.0000"/>