在 JSF 页面上显示当前日期 [英] Display Current Date on JSF Page

问题描述

是否可以在不使用支持 bean 的情况下在 JSF 中显示当前日期(今天的)?

Is it possible to display the current date (today's) in JSF without using a backing bean?

我有以下代码片段，但没有成功.

I have the following code snippet , but it didn't work out.

<div class="leftSide">Today's date #{currentDate}</div>

或

<f:facet name="header">  
<h:outputText value="Today's date" />  
</f:facet>
<h:outputText value="#currentDate">
    <f:convertDateTime pattern="MM/dd/yyyy" type="date" />
</h:outputText>

推荐答案

您可以将 java.util.Date 的实例注册为 faces-config.xml.

You could register an instance of java.util.Date as a request scoped bean in faces-config.xml.

<managed-bean>
    <managed-bean-name>currentDate</managed-bean-name>
    <managed-bean-class>java.util.Date</managed-bean-class>
    <managed-bean-scope>request</managed-bean-scope>
</managed-bean>

这样它就可以作为 #{currentDate} 使用，而无需自定义支持 bean 类.

This way it's available as #{currentDate} without the need for a custom backing bean class.

更新:JSF 实用程序库 OmniFaces 有这样一个 bean 已注册为#{now}.因此，如果您碰巧已经使用 OmniFaces，则可以直接使用它.

Update: the JSF utility library OmniFaces has such a bean already registered as #{now}. So if you happen to use OmniFaces already, you can just make use of it directly.

<h:outputText value="#{now}">
    <f:convertDateTime pattern="MM/dd/yyyy" type="date" />
</h:outputText>

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