Adding a Form Component

A UIForm component class represents an input form, which includes child components that contain data that is either presented to the user or submitted with the form.

Figure 11–1 shows a typical login form, in which a user enters a user name and password, and submits the form by clicking the Login button.

Figure 11–1 A Typical Form

The form tag represents the UIForm component on the page and encloses all the components that display or collect data from the user, as shown here:

<h:form>
... other JavaServer Faces tags and other content...
</h:form>

The form tag can also include HTML markup to lay out the components on the page. The form tag itself does not perform any layout; its purpose is to collect data and to declare attributes that can be used by other components in the form. A page can include multiple form tags, but only the values from the form that the user submits will be included in the postback.