我使用 Jsf 2.0 和 primefaces 扩展组件 pe:layout 创建一个带有左侧导航菜单栏、底部页脚和中心窗格的页面，内容一切正常，但是当我在中心窗格中添加 primefaces 数据表（p:datatable）时，标题和保留页脚布局，但左侧窗格消失，中间窗格占据整个页面。我尝试设置数据表的宽度和高度，但似乎没有任何效果。该页面在没有数据表的情况下正确显示。任何帮助将不胜感激。
请在下面找到带有数据表的代码：
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui"
xmlns:pe="http://primefaces.org/ui/extensions">
<ui:composition template="/templates/showcaseLayout.xhtml">
<ui:define name="centerContent">
<f:facet name="header">
<h:outputText value="Jan Sampark"/>
</f:facet>
<h:panelGroup layout="block" styleClass="centerContent">
Welcome to the Menu Page.
<p:growl id="messages" showDetail="true"/>
</h:panelGroup>
<p:tabView id="tabView">
<p:tab id="tab1" title="Godfather Part I">
<h:panelGrid columns="2" cellpadding="10">
<p:graphicImage id="tab1Img" value="/images/godfather/godfather1.jpg" />
<h:outputText id="tab1Text"
value="The story begins as Don Vito Corleone, the head of a New York Mafia family, oversees his daughter's wedding.
His beloved son Michael has just come home from the war, but does not intend to become part of his father's business. T
hrough Michael's life the nature of the family business becomes clear. The business of the family is just like the head of the family, kind and benevolent to those who give respect,
but given to ruthless violence whenever anything stands against the good of the family." />
</h:panelGrid>
</p:tab>
<p:tab id="tab2" title="Godfather Part II">
<h:panelGrid columns="2" cellpadding="10">
<p:graphicImage id="tab2Img" value="/images/godfather/godfather2.jpg" />
<h:outputText id="tab2Text" value="Francis Ford Coppola's legendary continuation and sequel to his landmark 1972 film, The_Godfather, parallels the young Vito Corleone's rise with his son Michael's spiritual fall, deepening The_Godfather's depiction of the dark side of the American dream.
In the early 1900s, the child Vito flees his Sicilian village for America after the local Mafia kills his family. Vito struggles to make a living, legally or illegally, for his wife and growing brood in Little Italy,
killing the local Black Hand Fanucci after he demands his customary cut of the tyro's business. With Fanucci gone, Vito's communal stature grows."/>
</h:panelGrid>
</p:tab>
<p:tab id="tab3" title="Godfather Part III">
<h:panelGrid columns="2" cellpadding="10">
<p:graphicImage id="tab3Img" value="/images/godfather/godfather3.jpg" />
<h:outputText id="tab3Text" value="After a break of more than 15 years, director Francis Ford Coppola and writer Mario Puzo returned to the well for this third and final story of the fictional Corleone crime family.
Two decades have passed, and crime kingpin Michael Corleone, now divorced from his wife Kay has nearly succeeded in keeping his promise that his family would one day be completely legitimate."/>
</h:panelGrid>
</p:tab>
</p:tabView>
<h:panelGroup layout="block" styleClass="centerContent">
<p:dataTable var="car" value="#{tableBean.carsSmall}" id="carList" editable="true" style="table-layout: fixed"
scrollable="true" scrollHeight="250" scrollWidth="300">
<f:facet name="header">
In-Cell Editing
</f:facet>
<!-- <p:ajax event="rowEdit" listener="#{tableBean.onEdit}" update=":form:messages" /> -->
<!-- <p:ajax event="rowEditCancel" listener="#{tableBean.onCancel}" update=":form:messages" /> -->
<p:column headerText="Model" >
<p:cellEditor>
<f:facet name="output">
<h:outputText value="#{car.model}" />
</f:facet>
<f:facet name="input">
<p:inputText value="#{car.model}" />
</f:facet>
</p:cellEditor>
</p:column>
<p:column headerText="Manufacturer">
<p:cellEditor>
<f:facet name="output">
<h:outputText value="#{car.manufacturer}" />
</f:facet>
<f:facet name="input">
<h:selectOneMenu value="#{car.manufacturer}" >
<f:selectItems value="#{tableBean.manufacturers}"
var="man"
itemLabel="#{man}"
itemValue="#{man}" />
</h:selectOneMenu>
</f:facet>
</p:cellEditor>
</p:column>
<p:column headerText="Color">
<p:cellEditor>
<f:facet name="output">
<h:outputText value="#{car.color}" />
</f:facet>
<f:facet name="input">
<h:selectOneMenu value="#{car.color}" >
<f:selectItems value="#{tableBean.colors}"
var="color"
itemLabel="#{color}"
itemValue="#{color}" />
</h:selectOneMenu>
</f:facet>
</p:cellEditor>
</p:column>
<p:column headerText="Options">
<p:rowEditor />
</p:column>
</p:dataTable>
</h:panelGroup>
</ui:define>
<ui:define name="docuTable">
<ui:include src="/sections/shared/documentation.xhtml">
<ui:param name="tagName" value="timeline"/>
</ui:include>
</ui:define>
</ui:composition>
</html>