Getting ClassNotFoundException for Validator class

Question

I am trying to learn JSF doing a demo project. When I try to add validator to some components, I get java.lang.ClassNotFoundException: com.test.validator.TestValidator

My faces-config looks like this

    <validator>
    <validator-id>Validator</validator-id>
    <validator-class>com.test.validator.TestValidator</validator-class>
    </validator>

Validator class

public class TestValidator implements Validator {


    @Override
    public void validate(FacesContext context, UIComponent componentToValidate,
            Object value) throws ValidatorException {
        //Add code

    }

}

and finally facelet

     <f:validator validatorId="Validator"></f:validator>

I am not sure if I am missing something. All help are appreciated. Thanks

Answer 1

I can think of a number of possible causes:

• The TestValidator class is missing a package declaration, so you've actually declared it in the default package... as noted by @Jigar Joshi.

• You haven't compiled it.

• You haven't created / updated the JAR that contains the class.

• You haven't included the JAR in the WAR / EAR.

• The WAR / EAR (or the webserver) is missing the JAR file that contains some class that your TestValidator depends on. (Seems unlikely...)

• You haven't redeployed the WAR / EAR.