JSF中如何使h:panelGrid里的内容自动换行

			<h:dataTable id="ttable" value="#{BbsHandler.threadList}" rendered="true" var="item" headerClass="table_header" rowClasses="table_item,table_item" cellpadding="4" cellspacing="1" border="0" >
			<h:column>
				<f:facet name="header">
				</f:facet>
				<h:panelGrid columns="1" rendered="true">
					<h:outputText value="由#{item.username}/#{item.adduser}发表于#{item.addtime}" >
						<f:convertDateTime timeZone="GMT+8" type="both" />
					</h:outputText>
					<h:outputText value="　　#{item.content}" />
				</h:panelGrid>
			</h:column>
			</h:dataTable>
<p class="indent">

<h:outputText value="　　#{item.content}" />
<p class="indent">