The Java EE 7 Tutorial
As is the case with a custom validator, if the application developer creates a custom converter, you must register it with the application either by using the
@FacesConverter annotation, as described in Creating a Custom Converter, or by using the
converter XML element in the application configuration resource file. Here is a hypothetical
converter configuration for
CreditCardConverter from the Duke's Bookstore case study:
<converter> <description> Converter for credit card numbers that normalizes the input to a standard format </description> <converter-id>CreditCardConverter</converter-id> <converter-class> dukesbookstore.converters.CreditCardConverter </converter-class> </converter>
Attributes specified in a
converter tag override any settings in the
converter element represents a
javax.faces.convert.Converter implementation and contains required
converter-id element identifies an ID that is used by the
converter attribute of a UI component tag to apply the converter to the component's data. Using a Custom Converter includes an example of referencing the custom converter from a component tag.
converter-class element identifies the
Creating and Using a Custom Converter explains how to create a custom converter.