JSF 2.0动态属性，而无需创建新组件

问题描述

如何将新属性添加到没有创建自己属性就无法定义这些属性的组件中.

我想做这样的事情

<h:commandButton actionListener="#{manager.saveNew}" value="#{i18n['School.create']}" secured="true" />

或者至少是一种允许开发人员分配安全属性的方法.

有什么想法吗?

解决方案

您可以在h:commandButton中使用f:attribute.

<h:commandButton actionListener="#{manager.saveNew}
                 value="#{i18n['School.create']}">
     <f:attribute name="secured" value="true" />
</h:commandButton>

在您的操作方法中:

public void saveNew(ActionEvent event) {
   String secured = (String) event.getComponent().getAttributes().get("secured");
}

这是关于此主题的综合教程. /p>

How do you add new attributes to a component that doesn't define those attributes without creating your own.

I want to do something like this

<h:commandButton actionListener="#{manager.saveNew}" value="#{i18n['School.create']}" secured="true" />

or at least, a way to allow the developer to assign the secure attribute.

any ideas?

解决方案

You can use f:attribute inside your h:commandButton.

<h:commandButton actionListener="#{manager.saveNew}
                 value="#{i18n['School.create']}">
     <f:attribute name="secured" value="true" />
</h:commandButton>

And in your action method:

public void saveNew(ActionEvent event) {
   String secured = (String) event.getComponent().getAttributes().get("secured");
}

Here is a comprehensive tutorial on this topic.

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