JSTL常用标签
1:计算list集合大小
<c:if test="${fn:length(noticeBean.approvals)==0 }">
</c:if>
2:格式化日期的函数
<fmt:formatDate value="${v.tripStartDate }" pattern="yyyy-MM-dd hh:mm" />
http://sunxboy.iteye.com/blog/168764
3:格式化货币数字
http://blog.csdn.net/accpsz/article/details/3115657