Headers are not shown in exported excel file from primefaces datatable - jsf

Question

I have a datatable like this. But it would not export the headers to excel :
<h:form id="formOptionList">
<p:dataTable id="OptionTable"
var="Options"
widgetVar="OptionTable"
value="#{managedBean.options}"
filteredValue="#{managedBean.filteredOptions}"
emptyMessage="No Options found."
rendered="#{managedBean.userPreferences.showTable}"
paginator="true"
rows="10"
paginatorTemplate="{FirstPageLink} {PreviousPageLink} {CurrentPageReport} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}"
rowsPerPageTemplate="20,50,100"
>
<p:column id="id" headerText="ID" filterBy="id" filterMatchMode="exact" width="12%" rendered="#{managedBean.userPreferences.showID}" >
<h:outputText value="#{options.optionID}" />
</p:column>
....
....
</p:dataTable>
<h:panelGrid columns="1">
<p:panel header="Export All Data">
<h:commandLink>
<p:graphicImage value="../resources/images/menuicons/options.png" />
<p:dataExporter type="xls" target="OptionTable" fileName="Options" />
</h:commandLink>
</p:panel>
</h:panelGrid>
</h:form>
So I changed it to
<p:column id="id" filterBy="id" filterMatchMode="exact" width="12%" rendered="#{managedBean.userPreferences.showID}" >
<f:facet name="header>">
<h:outputText value="Option ID"/>
</f:facet>
<h:outputText value="#{Options.OptionID}" />
</p:column>
And I still don't see the headers in the excel file. Any ideas ?
Headers are not shown in exported excel file from primefaces datatable

Answer 1

Try this:
<p:column id="id" filterBy="#{Options.OptionID}" filterMatchMode="exact" width="12%" rendered="#{managedBean.userPreferences.showID}" >
<f:facet name="header>">
<h:outputText value="Option ID"/>
</f:facet>
<h:outputText value="#{Options.OptionID}" />
</p:column>

Answer 2

You put a <h:outputText value= ""/> after your </f:facet> ?
<p:column>
<f:facet name="header">
<h:outputText value="Your Column Name" />
</f:facet>
<h:outputText value="Your value" />
</p:column>

Answer 3

You can put a new column with display none, from the existing column just put an exporter false
<p:column id="id" filterBy="# Options.OptionID}"filterMatchMode="exact" width="12%" rendered="#anagedBean.userPreferences.showID}"exporter="false">
<f:facet name="header>">
<h:outputText value="Option ID" />
</f:facet>
<h:outputText value="#{Options.OptionID}" />
</p:column>
Add new column with display none and remove all sorting,filtering and rendering
<p:column exporter="true" style="display:none;">
<f:facet name="header>">
<h:outputText value="Option ID"/>
</f:facet>
<h:outputText value="#{Options.OptionID}" />
</p:column>
This works perfectly.