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翻翻一些PrimeFaces代码的应用程序,我注意到以下行:PrimeFaces Datatable - f:facet实际在做什么?
<f:facet name="header">#{trainSearch.trainCount} Trains</f:facet>
它看起来就像是压倒一切的头,这是有道理的,但也有人在更详细一点解释这样对我?
这行代码实际发生了什么?
完整代码如下:
<p:dataTable id = "results" value = "#{trainSearch.trains}" var = "train" rendered="#{not empty trainSearch.trains}" styleClass = "train-search-table horizontal-border">
<f:facet name="header">#{trainSearch.trainCount} Trains</f:facet>
<p:column headerText = "Train ID">
<p:panelGrid columns="1" styleClass = "train-id-grid" layout = "grid">
<h:outputText styleClass = "train-id-label" value="#{train.trainI}"/>
<h:outputText value="#{train.originCityState} > #{train.destinationCityState}" />
</p:panelGrid>
</p:column>
<p:column headerText="Scheduled Departure">
<h:outputText value="#{train.formattedScheduledDepartureText}" />
</p:column>
<p:column headerText="Scheduled Arrival">
<h:outputText value="#{train.formattedScheduledArrivalText}" />
</p:column>
<p:column headerText="Loco Count">
<h:outputText value="#{train.locoCount}" />
</p:column>
<p:column headerText="Car Count">
<h:outputText value="#{train.carCount}" />
</p:column>
</p:dataTable>