# Adding a Validator

You can add a validator to your Web application. A validator defines a set of standard classes for performing common data validation checks, for example, a phone number input field must be numbers. A component can have one or more validators.

To add a validator:

1. Select faces-config.xml in the Project Explorer of the J2EE perspective.

   The JSF Application Configuration editor opens.

2. Select the Component tab of the editor.

3. Expand the Validators section.

   A list of defined validators displays.

4. Click Add.

   A new validator is added to the Converters list with the default name New Validatorx.

5. (Optional) Change the default validator name to a unique, descriptive name in the Display name field of the General section.

6. (Optional) Type a description in the Description field.

7. Type an ID in the Validator ID field.

8. Click Browse and select a Validator Class.

9. Click Add in the Attributes section to add an attribute value.

10. Click Add in the Properties section to add a property.

JSF Application Configuration

Faces Config Editor

Tutorial