如何在JSTL中格式化日期 [英] How to format date in JSTL

问题描述

我有一个循环，通过我们网站上的所有新闻。其中一个字段是日期 $ {newsitem.value ['Date']} ，以毫秒为单位。我想在网页上以月/日/年格式显示此日期。我认为JSTL格式标签< fmt：formatDate> 将有所帮助，但我没有成功。你知道怎么做吗

 < cms：contentaccess var =newsitem/> 
< h2>< c：out value =$ {newsitem.value ['Title']}/>< / h2> 
 //显示日期
< c：out value =$ {newsitem.value ['Text']}escapeXml =false/> 
  

解决方案

是的JSTL formatDate 标签应该将此工作与将Timestamp值更改为日期对象（需要解决您的评论中提到的异常有关）。

确保您在JSP声明中正确定义了 fmt 前缀

 <％@ taglib uri =http://java.sun.com/jsp/jstl/fmtprefix =fmt％> 
  

渲染输出，首先将时间戳转换为日期值。我正在使用 yyyy-MM-dd 作为格式模式， dateFormat 标签支持其他格式选项。

 < cms：contentaccess var =newsitem/> 
< jsp：useBean id =newsDateclass =java.util.Date/> 
< jsp：setProperty name =newsDateproperty =timevalue =$ {newsitem.value ['Date']}/> 
< h2>< c：out value =$ {newsitem.value ['Title']}/>< / h2> 
< fmt：formatDate pattern =yyyy-MM-ddvalue =$ {newsDate}/> 
< c：out value =$ {newsitem.value ['Text']}escapeXml =false/> 
  

I have a loop that goes through all the news items we have on our site. One of the fields is date ${newsitem.value['Date']}, given in millliseconds. I'd like to display this date in month/day/year format on the webpage. I thought JSTL format tag, <fmt:formatDate>, would help, but I haven't succeeded. Do you know how to do it?

<cms:contentaccess var="newsitem" />
<h2><c:out value="${newsitem.value['Title']}" /></h2>
// display date here        
<c:out value="${newsitem.value['Text']}"  escapeXml="false" />

解决方案

Yes the JSTL formatDate tag should do the job in combination with changing the Timestamp value into a date object (which is required to work around the exception mentioned in your comment).

Ensure that you have properly defined the fmt prefix in the JSP declarations

<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>

Render the output, convert the time stamp to a date value first. I'm using yyyy-MM-dd as the format pattern, the dateFormat tag supports other formatting options as well.

<cms:contentaccess var="newsitem" />
<jsp:useBean id="newsDate" class="java.util.Date" />
<jsp:setProperty name="newsDate" property="time" value="${newsitem.value['Date']}" />
<h2><c:out value="${newsitem.value['Title']}" /></h2>
<fmt:formatDate pattern="yyyy-MM-dd" value="${newsDate}" />
<c:out value="${newsitem.value['Text']}" escapeXml="false" />

这篇关于如何在JSTL中格式化日期的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！