How to customize JSF validation error message

Question

How can I customize the validation message that appears when validation fails?

Here is the code I have:

Answer 1

In addition to Daniel's answer you could always use the label attribute for your input components to remove the client-id (j_idt10:userNo:) from the error message.

E.g. with

will produce:

User number: Validation Error: Specified attribute is not between the expected values of 3 and 6.

The label attribute can be an el expression as well to change this part of the error message dynamically.