Show JSF error page for exceptions when user tampers with form submits

Question

I am trying to show an generic error message page when a user tampers with POST data in a richfaces calendar. (Using tamper data firefox plugin).

I select a normal date, turn on the tamper and adjust the date value to contain string values. It returns to the page displaying the following error messages:

java.lang.NumberFormatException: For input string: "2012dsafsf"
java.lang.NumberFormatException: For input string: "2012sdfsdf"

I'm using <h:messages /> to display messages.

I have added the following to my web.xml but it is not redirecting to this page.

<error-page>
  <exception-type>java.lang.NumberFormatException</exception-type>
  <location>/error.xhtml</location>
</error-page>

Any ideas where I'm going wrong?

What I essentially need is a generic class/phase listener/converter/whatever.. to intercept and handle certain types of exceptions that are caught by JSF. (Not unhandled exceptions).

Thanks

Answer 1

The easiest way to fix it is to add a validator to the field. With the validator it is possible to add a specific message for this error.

Some information on Validation & conversion: http://www.ibm.com/developerworks/java/library/j-jsf3/

The error documents are used for HTTP status codes (eg 404/500)