Faces messages

The JSF provides two custom tags to display error messages. The <h:message> tag displays messages that are bound to specific components. The <h:messages> tag displays messages that are not bound to specific components.

We saw our first use of <h:message> in Chapter 3, Building JSF Forms. The tag is typically associated with a form control. We can add messages to our JSF pages with the following:

<h:messages globalOnly="false" styleClass="alert alert-danger" />

The tag is added to the top of the content. The attribute globalStyle is a Boolean value, and it specifies whether the tag should display messages that are not associated with a component. Here, we are using the Bootstrap CSS selectors again.

The following is a table of the attributes that are shared between the JSF tags, <h:messages> and <h:message>:

Attribute	Description
Id	Specifies the unique identifier
errorClass	Specifies the CSS class selectors for error messages
errorStyle...