DataTable - Group DataTable column headers and footers can be combined for grouped display.
Sales/Profits of Manufacturers
ManufacturerSale Rate
SalesProfit
Last YearThis YearLast YearThis Year
Totals:\$528,220\$475,464
Apple9%52%$40,867.00$79,308.00
Samsung66%89%$48,168.00$32,942.00
Microsoft71%9%$32,774.00$33,329.00
Philips97%15%$90,553.00$97,273.00
Sony76%75%$24,029.00$37,596.00
LG67%63%$32,078.00$6,176.00
Sharp4%41%$47,222.00$21,180.00
Panasonic42%77%$97,015.00$65,442.00
HTC0%23%$62,163.00$93,020.00
Nokia28%30%$53,351.00$9,198.00
Dynamic Columns
PlayerGoals
20102011201220132014
Lionel Messi1547213324
Cristiano Ronaldo183444431
Arjen Robben38394145
Franck Ribery191529434
Ronaldinho311111111
Luis Suarez4114324247
Sergio Aguero323394036
Zlatan Ibrahimovic046471225
Neymar Jr4547103137
Andres Iniesta418411417
   
<h:form>
    <p:dataTable var="sale" value="#{dtGroupView.sales}">
        <f:facet name="header">
            Sales/Profits of Manufacturers
        </f:facet>

        <p:columnGroup type="header">
            <p:row>
                <p:column rowspan="3" headerText="Manufacturer" />
                <p:column colspan="4" headerText="Sale Rate" />
            </p:row>
            <p:row>
                <p:column colspan="2" headerText="Sales" />
                <p:column colspan="2" headerText="Profit" />
            </p:row>
            <p:row>
                <p:column headerText="Last Year" />
                <p:column headerText="This Year" />
                <p:column headerText="Last Year" />
                <p:column headerText="This Year" />
            </p:row>
        </p:columnGroup>

        <p:column>
            <h:outputText value="#{sale.manufacturer}" />
        </p:column>
        <p:column>
            <h:outputText value="#{sale.lastYearProfit}%" />
        </p:column>
        <p:column>
            <h:outputText value="#{sale.thisYearProfit}%" />
        </p:column>
        <p:column>
            <h:outputText value="#{sale.lastYearSale}">
                <f:convertNumber type="currency" currencySymbol="$" />
            </h:outputText>
        </p:column>
        <p:column>
            <h:outputText value="#{sale.thisYearSale}">
                <f:convertNumber type="currency" currencySymbol="$" />
            </h:outputText>
        </p:column>

        <p:columnGroup type="footer">
            <p:row>
                <p:column colspan="3" style="text-align:right" footerText="Totals:" />
                <p:column footerText="$#{dtGroupView.lastYearTotal}" />

                <p:column footerText="$#{dtGroupView.thisYearTotal}" />
            </p:row>
        </p:columnGroup>

        <f:facet name="footer">
            Data between 2013-2014
        </f:facet>
    </p:dataTable>

    <p:dataTable var="player" value="#{dtGroupView.players}" style="margin-top:40px">
        <f:facet name="header">
            Dynamic Columns
        </f:facet>

        <p:columnGroup type="header">
            <p:row>
                <p:column rowspan="2" headerText="Player" />
                <p:column colspan="#{dtGroupView.yearCount}" headerText="Goals" />
            </p:row>
            <p:row>
                <ui:repeat value="#{dtGroupView.years}" var="year">
                    <p:column headerText="#{year}" />
                </ui:repeat>
            </p:row>
        </p:columnGroup>

        <p:column>
            <h:outputText value="#{player.name}" />
        </p:column>

        <p:columns value="#{dtGroupView.years}" var="year">
            <h:outputText value="#{player.getGoals(year)}" />
        </p:columns>

        <f:facet name="footer">
            Data between 2010-2014
        </f:facet>
    </p:dataTable>
</h:form>
                
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