How to set colspan and rowspan in JSF panelGrid?

问题

How can I set colspan and rowspan in JSF <h:panelGrid>?

回答1:

None of both is possible with the standard JSF implementation. There are 3 ways to fix this:

Write plain HTML yourself. A <h:panelGrid> basically renders a HTML <table>. Do the same.
Create a custom HTML renderer which supports this. It'll however be a lot of sweat and pain.
Use a 3rd party component library which supports this.
- Tomahawk has a <t:panelGroup> component which supports colspan in <h:panelGrid>.
- RichFaces (3.x only) has a <rich:column> component which supports both colspan and rowspan in <rich:dataTable>.
- PrimeFaces has a <p:row> next to <p:column> which is supported in both <p:panelGrid> and <p:dataTable> (also with <p:columnGroup>).

回答2:

Since 24 januari 2012 Primefaces also has the possibility to use colspan and rowspan in the panelGrid component of Primefaces. See:

http://www.primefaces.org/showcase/ui/panel/panelGrid.xhtml

回答3:

assume

a) a message resource file with two entries:
key.row=< /td>< /tr>< tr>< td (ignore spaces)
key.gt=>

b) row.xhtml

<ui:composition 
    xmlns="http://www.w3.org/1999/xhtml"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:c="http://java.sun.com/jsp/jstl/core" >

    <c:forEach begin="0" end="#{colspan-2}">
        <h:panelGroup />
    </c:forEach>

    <h:panelGroup>
      <h:outputText value="#{i18n['key.row']}" escape="false" />
      <h:outputText value=" colspan='#{colspan}' #{cellAttributes}" />
      <h:outputText value="#{i18n['key.gt']}" escape="false" />

      <ui:insert />
    </h:panelGroup>

</ui:composition>

then, for example

<h:panelGrid columns="3">
  <h:outputText value="r1-c1" />
  <h:outputText value="r1-c2" />
  <h:outputText value="r1-c3" />

  <ui:decorate template="/row.xhtml">
    <ui:param name="colspan" value="3" />
    <ui:param name="cellAttributes" value=" align='center'" />

    <div>Hello!!!!!</div>
  </ui:decorate> 
</h:panelGroup>

prints a table with 3 rows:

1) r1-c1, r1-c2 , r1-c3

2) 3 blank cells

3) a cell aligned center, having colspan 3 and containing a hello div..

回答4:

Use: rich:column colspan="2" of RichFaces

<rich:column colspan="2">                        
<h:outputText  value="Ingrese el texto de la imagen" /> 
</rich:column>

回答5:

I agree with BalusC's answer and want to add, that the Primefaces JSF2 component library also offers this functionality if you use its p:dataTable component. It is called grouping there.

回答6:

There is no way to define column span in panel grid but if used wisely you can make it happen by just plain tag only. One example I would like to show you.

<h:panelGrid columns="1" >
<h:panelGrid columns="2">
    <h:commandButton image="resources/images/Regular5.jpg" action="booking/Create.jsf?faces-redirect=truebookingType=REGULAR">
    </h:commandButton>
    <h:commandButton id="button2" image="resources/images/Casual2.jpg" action="booking/Create.jsf?faces-redirect=truebookingType=CASUAL">
    </h:commandButton>
</h:panelGrid>
<h:panelGrid columns="2">
    <h:commandButton id="button3" image="resources/images/Instant2.jpg" action="booking/Create.jsf?faces-redirect=truebookingType=INSTANT">
    </h:commandButton>
    <h:commandButton id="button4" image="resources/images/Outstation6.jpg" action="booking/Create.jsf?faces-redirect=truebookingType=OUTSTATION">
    </h:commandButton> 
</h:panelGrid>
<h:commandButton id="button5" image="resources/images/ShareMyCar.jpg" action="booking/Create.jsf?faces-redirect=truebookingType=OUTSTATION">
</h:commandButton>

Please note that button5 spans two columns given the size it requires.

来源：https://stackoverflow.com/questions/3111081/how-to-set-colspan-and-rowspan-in-jsf-panelgrid

标签

jsf

html-table

panelgrid