如何从managedBean设置jsf组件属性？

Question

As said in the title, i'd like to change a component property identified by an id in a jsf page from a managed bean. Here is my jsf code :

<p:calendar value="#{eventBean.beginDate}" id="from" pattern="dd/MM/yyyy HH:mm" required="true"/>

It's a PrimeFaces component. At the initialization of the page, i've got an empty field that display by clicking in a calendar. Choosing a date fill the field with the selected value. My question is : how to fill the field with the current date at the initialization of my jsf page ? I dunno if there is a possibility by using PrimeFaces calendar component properties (i've try several things that didn't work) and i'd like to know if that's possible using managed bean.

Thank you !

Answer 1

Just set the property during bean's (post)construction.

private Date beginDate;

public EventBean() {
    // Here, in constructor.
    eventDate = new Date();
}

@PostConstruct
public void init() {
    // Or here, in a @PostConstruct method. 
    // This is invoked after any dependency and managed property injection.
    eventDate = new Date();
}

Note that this approach is not specific to the calendar property. It applies to all kinds of properties.

Answer 2

You need to update/define default values at the bean. In this case you can define the value in the constructor; if the value depends of injected attributes you need to use a @PostConstruct method.