在我的 jsp 页面中,我指定:
<c:choose>
line 1: <c:when test="${com.community_classification_id.contains('1')}">
<input type="checkbox" id="by_invitation1" name="invitaion" value="1" checked="true">By Invitation<span style="padding-left:28px"></span>
</c:when>
<c:otherwise>
<input type="checkbox" id="by_invitation1" name="invitaion" value="1">By Invitation<span style="padding-left:28px"></span>
</c:otherwise>
</c:choose>
但@line 没有。1 它给了我 500 错误
The function contains must be used with a prefix when a default namespace is not specified
我无法理解。怎么了?