If you want to avoid dependencies on Servlet classes for the request and response, you can also have your interceptor class implement SessionAware and ParameterAware. This does introduce a couple of boilerplate methods, which I've noticed you don't care for, but those replace the equally boilerplate code to get the context and then the request and response that way, so I think it balances.
avoiding dependency on Servlet classes
If you want to avoid dependencies on Servlet classes for the request and response, you can also have your interceptor class implement
SessionAwareandParameterAware. This does introduce a couple of boilerplate methods, which I've noticed you don't care for, but those replace the equally boilerplate code to get the context and then the request and response that way, so I think it balances.