问题
This is probably a really simple JSF question, but I can't seem to find the simple answer.
I have a List of images, and I want to display them in a table of images. Each image is displayed with its filename. I'm using a ui:repeat tag as shown below. I don't get 5 columns as requested, however, only 1.
<h:panelGrid id="resourcePanel" columns="5" rules="all">
<ui:repeat var="res" value="#{resourceUpload.resources}">
<h:panelGrid columns="1" rules="none">
<h:graphicImage
value="/image/resource?id=#{res.idAsString}"
style="width:100px;" />
<h:outputText value="#{res.name}" />
</h:panelGrid>
</ui:repeat>
</h:panelGrid>
回答1:
The output is fully as expected and specified. The <ui:repeat> is a render time tag, not a view build time tag like <c:forEach>. After building the view, <h:panelGrid> ends up with 1 child component (the <ui:repeat> itself), not with n nested <h:panelGrid> components like as you would get with <c:forEach>.
<html ... xmlns:c="http://java.sun.com/jsp/jstl/core">
...
<h:panelGrid id="resourcePanel" columns="5" rules="all">
<c:forEach var="res" items="#{resourceUpload.resources}">
<h:panelGrid columns="1" rules="none">
<h:graphicImage
value="/image/resource?id=#{res.idAsString}"
style="width:100px;" />
<h:outputText value="#{res.name}" />
</h:panelGrid>
</c:forEach>
</h:panelGrid>
(this has in the Mojarra versions older than 2.1.18 however an implication on #{resourceUpload}: it can't be a view scoped bean, it must be request scoped due to a chicken-egg issue in view state saving/restoring; you'd need to upgrade to Mojarra 2.1.18)
Your nested <h:panelGrid> makes by the way no utter sense. I'd have used <h:panelGroup> here.
See also:
- JSTL in JSF2 Facelets... makes sense? - to understand "view build time" vs "view render time" better
- create table columns dynamically in JSF - another similar question
回答2:
Why do you use another <h:panelGrid> inside the <ui:repeat>? You can just use a div like this.
Instead of
<h:panelGrid columns="1" rules="none">
use
<div style="display:inline-block;">
Edit:
I don't think that you can do it with
<ui:repeat>. Use <c:forEach> instead.First you should import the namespace
xmlns:c="http://java.sun.com/jstl/core"
Now replace the <ui:repeat> with <c:forEach> like this.
<c:forEach items="#{accountMastList.resultList}" var="res">
来源：https://stackoverflow.com/questions/13596456/display-a-list-of-images-in-a-table-format-in-jsf