jstl数字转日期

<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
<jsp:useBean id="myDate" class="java.util.Date"/>

<c:set target="${myDate}" property="time" value="${article.updateTime*1000}"/>
<fmt:formatDate pattern="yyyy-MM-dd" value="${myDate}" type="both"/>