对于类似于下面的代码,当光标悬停在列标题上时,标题不会出现。有任何想法吗?
<h:column title="COLUMN 1">
<f:facet name="header" >COL 1</f:facet>
<h:outputText id="col1" value="#{oneEntry.col1}" styleClass="al"/>
</h:column>
<h:column title="COLUMN 2">
<f:facet name="header" >COL 2</f:facet>
<h:outputText id="col2" value="#{oneEntry.col2}" styleClass="al"/>
</h:column>