java 如何在表达式语言中格式化数字?
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How to format a number in Expression Language?
提问by Alexey Kalmykov
How can I make a formatted output for a number (e.g. longor BigDecimal) in EL? For example, I want to limit a number of decimal digits to 3 in
如何在 EL 中为数字(例如long或BigDecimal)进行格式化输出?例如,我想将十进制数字的数量限制为 3
${result.returnValue.contract.balance}
回答by skaffman
Using <fmt:formatNumber/>
使用 <fmt:formatNumber/>
http://java.sun.com/products/jsp/jstl/1.1/docs/tlddocs/fmt/formatNumber.html
http://java.sun.com/products/jsp/jstl/1.1/docs/tlddocs/fmt/formatNumber.html
For example:
例如:
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<fmt:formatNumber
value="${result.returnValue.contract.balance}"
maxFractionDigits="3"/>
回答by Marc Dzaebel
The modern Java EE 5-8 approach with JSF is:
使用 JSF 的现代 Java EE 5-8 方法是:
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core">
<h:outputText value="#{result.returnValue.contract.balance}">
<f:convertNumber minFractionDigits="3"/>
</h:outputText> ...
See also Using the Standard Converters. Since Java EE 6 (2009), JSF/Facelets is recommended.
另请参阅使用标准转换器。从 Java EE 6 (2009) 开始,推荐使用 JSF/Facelets。

