JSF 2复合组件，将属性传递到支持Bean [英] JSF 2 composite component, passing attributes to backing bean

问题描述

我陷入了一个简单的JSF2问题：

I'm stuck on simple JSF2 question:

XHTML：

<xvf:simpleOut identifier="12345"/>

复合组件应该将 12345传递给支持bean并执行一些输出：

Composite component is supposed to pass "12345" to backing bean and do some output:

<composite:interface>
    <composite:attribute name="identifier" required="true" type="java.lang.String"/>
</composite:interface>

<composite:implementation>
    <!--@elvariable id="arg" type="java.lang.String"-->
    <ui:param name="arg" value="#{cc.attrs.identifier}"/>
    <h:outputText value="#{myBean.getTestOutput('???????')}"/>
</composite:implementation>

如何传递标识符的值，在我的情况下为12345，到bean的 getTestOutput（String arg）方法？

How do I pass identifier value, '12345' in my case, to bean's getTestOutput(String arg) method?

推荐答案

您根本不需要< ui：param> 标记。这应该起作用：

You don't need the <ui:param> tag at all. This should work:

<h:outputText value="#{myBean.getTestOutput(cc.attrs.identifier)}"/>

但通过 myBean 也可以通过该接口而不是直接引用它，因为它将使复合组件可重用。

But it might a a good idea to pass myBean through the interface as well rather than refering to it directly, since it would make the composite component reusable.

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