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Recipe 24.10 Formatting Currencies in a JSP


You want to format currency values in a JSP.


Use the JSTL tag fmt:formatNumber.


The fmt:formatNumber tag is designed to display a currency value based on the visitor's locale. Example 24-11 first uses the taglib directive to make the JSTL 1.0 formatting library available to the JSP.

Example 24-11. formatting a number using the JSTL 1.0 tags
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>

<%-- the formatting library includes fmt:formatNumber --%>
<%@ taglib uri="http://java.sun.com/jstl/fmt" prefix="fmt" %>

<head><title> <fmt:message key="Welcome" /></title></head>
<h2> <fmt:message key="Hello" /> <fmt:message key="and" /> <fmt:message key="Welcome" /></

Locale: <c:out value="${pageContext.request.locale.language}" />_<c:out 
value="${pageContext.request.locale.country}" /> 

<br /><br />

<fmt:formatNumber value="1000000" type="currency" />

The fmt:formatNumber tag is quite straightforward. The value attribute takes the number you want to format as a currency, and the value of the type attribute must be "currency." The text representing the formatted number then replaces the tag when a browser displays the JSP's output. The JSP in Example 24-11 displays the same browser information as shown in Figure 24-6 of the prior recipe.

See Also

Chapter 23 on the JSTL; the Javadoc for the NumberFormat class: http://java.sun.com/j2se/1.4.1/docs/api/java/text/NumberFormat.html; Recipe 24.9 on formatting currencies in a servlet.

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