jstl的c:if 没有else想要实现if...else...:可以用下面的解决--------------------------------------------------------------------结构:<c:choose> <c:when test=""> 如果
</c:when> <c:otherwise> 否则
</c:otherwise></c:choose>代码:<c:choose>
<c:when test="${sessionScope.USERTYPE == 'inner'}">
<c:set value="${context_root}/igmgr/MEB004.dow" var="action" scope="page"/>
</c:when>
<c:when test="${sessionScope.USERTYPE == 'merc'}">
<c:set value="${context_root}/igmgr/MEB021.dow" var="action" scope="page"/>
</c:when>
<c:otherwise>
<c:set value="${context_root}/igmgr/MEB020.dow" var="action" scope="page"/>
</c:otherwise>
</c:choose>