Trapping bind errors to display as failed validation error

Hi,

I've successfully created validators to validate form input but I have one small issue: When a field that maps to a numeric field on command object is left blank or alfa data is entered, the following error is displayed:

Code:

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Failed to convert property value of type [java.lang.String] to required type [java.lang.Integer] for property 'version'; nested exception is java.lang.NumberFormatException ...

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Where do I trap this exception and

a) ignore it if the field is optional
b) display a more user friendly message.

Thanks very much. Regards,
Stefan :)

Sorry, I omitted some info to set the stage for the question:

I have a subclass of SimpleFormController that uses formBackingObject to get the data to display,

it has a validator that implements validate(Object command, Errors errors) to validate the user input and rejectValue(...) to set error messages for invalid user input

and it uses onSubmit to save the user input.

Regards,
Stefan

a) I don't think you can 'ignore' the error, if the user enters data for the field, the binder will try to bind it and you will get some error if that fails.

b) Check the JavaDoc for DataBinder, DefaultMessageCodesResolver and MessageTag.

BTW: SimpleFormController related questions should go in the "Web" forum, since they do not relate to Spring Web Flow.

Erwin