<c:choose>
<c:when test="S{empty yourVariable}">
// if your variable is empty , codes are here
</c:when>
<c:otherwise>
// if your variable is not empyt , this will count
</c:otherwise>
</c:choose><c:if test="${empty yourVariable}">
// if your variable is empty codes here
</c:if>
<c:when test="S{empty yourVariable}">
// if your variable is empty , codes are here
</c:when>
<c:otherwise>
// if your variable is not empyt , this will count
</c:otherwise>
</c:choose><c:if test="${empty yourVariable}">
// if your variable is empty codes here
</c:if>
解决方案 »
免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货