ui:repeat和h:panelGrid [英] ui:repeat and h:panelGrid

问题描述

使用类似的东西

时

<h:panelGrid columns="1">
    <ui:repeat var="o" value="#{mybean.list}">
        <h:outputText value="#{o.text}"/>
    </ui:repeat>
</h:panelGrid>

用10个列表项，我只能得到1行，例如:1 tr的tr，而当我使用c:forEach时我得到10(但是c:forEach实际上是邪恶的，它用ajax弄乱了一切)

我使用mojarra 1.2-这是MyFaces实现中不存在的典型Mojarra错误吗?它会在Mojarra的2.x版本中消失吗?

解决方案

输出完全符合预期并已指定. <ui:repeat>是渲染时间标签，而不是像<c:forEach>这样的视图构建时间标签.构建视图后，<h:panelGrid>最终带有1个子组件(<ui:repeat>本身)，而不是像<c:forEach>那样具有 n <h:outputText>组件.

您需要一个<h:dataTable>.正是为此目的而设计的.

<h:dataTable var="o" value="#{mybean.list}">
    <h:column>
        <h:outputText value="#{o.text}"/>
    </h:column>
</h:dataTable>

另请参见:

• JSF2 Facelets中的JSTL ...有意义吗?

When using something like

<h:panelGrid columns="1">
    <ui:repeat var="o" value="#{mybean.list}">
        <h:outputText value="#{o.text}"/>
    </ui:repeat>
</h:panelGrid>

with lets say 10 list entries I only get 1 row e.g.: one tr with 1 td whereas when I use c:forEach i get 10 (but c:forEach is in fact evil, it messes up everything with ajax)

I use mojarra 1.2 - is this a typical Mojarra bug which does not exist in the MyFaces implementation? Will it disappear in 2.x of the Mojarra releases?

解决方案

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 <h:outputText> components like as with <c:forEach>.

You need a <h:dataTable> instead. It's designed for exactly this purpose.

<h:dataTable var="o" value="#{mybean.list}">
    <h:column>
        <h:outputText value="#{o.text}"/>
    </h:column>
</h:dataTable>

See also:

• JSTL in JSF2 Facelets... makes sense?

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