在JSTL中的计算jsp中访问JSTL变量

Question

In jsp i have this portion and works fine

<c:forEach var="info" items="${infoList}" >
<tr>
    <td>${info.key} </td>
    <td>${info.total}</td>
    <td>${info.delay}</td>
</tr>
</c:forEach>

here infoList comes from struts action class which is a ArrayList of Class Info

public class Info{
private String key;
private String total;
private String delay

}

Now i need to add another <td> which will print the percentage calculated like ${info.delay}*100/${info.total} but will print exactly two digit after decimal.

I tried this

${ info.totalDelay*100/info.totalShipment } 

which print the percentage but can't limit to 2 digit. In java i can use

NumberFormat formatter = new DecimalFormat("#0.00");

But how i will do that i here because in in <% %> (jap tag) i cant use ${}

Can i access those variable in <% %> some how Or can i use formatter .format() in a <c:> tag

Answer 1

Using JSTL Format Number

<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<fmt:formatNumber type="number" minFractionDigits="2" maxFractionDigits="2" value="${ info.totalDelay*100/info.totalShipment } " />

Answer 2

Well i figured it out

in the top i did this :

<%
 NumberFormat numberFormat=new DecimalFormat("#.##");
%>

And i the td i did this:

<td>
<c:set var="tl" value="${info.total}"></c:set>
<c:set var="dl" value="${info.delay}"></c:set>
<jsp:useBean id="tl" class="java.lang.String"/> 
<jsp:useBean id="dl" class="java.lang.String"/> 

<%
     out.println(numberFormat.format(Double.parseDouble(dl)*100/Integer.parseInt(tl)));
%>
</td>