在jsp页面比较时间的大小

//-----------------------------------------------------controller--------------------

    Calendar c = Calendar.getInstance();

　　model.addAttribute("c", c);

//-------------------------------------------------jsp-----------------------

　　　<c:if test="${vo.offerTime.getTimeInMillis() - c.getTimeInMillis()  > 0 }">
        <a class="" target="_blank" href="${rootUrl}app/common/coalStore/detail/${vo.id}">查看</a>
        </c:if>
        <c:if test="${vo.offerTime.getTimeInMillis() - c.getTimeInMillis()  < 0 }">
        <a class="" target="_blank" href="${rootUrl}app/common/sunShop/detail/${vo.id}">查看1</a>
        </c:if>