Servlet Mappings with Variables(Tomcat 7.0)

Question

Is it possible to map URLs to servlets (maybe something specific with Tomcat) so that the two following URLs (with {id}'s being variables retrievable from code),

/users/{id}/a

/users/{id}/b

map to two different servlets, or will I have to implement some sort of filter of my own for a servlet mapped to /users/*?

To be more clear, any URL with the pattern /users/*/a should map to the same servlet. The same goes for /users/*/b.

Answer 1

This looks like it might be a good candidate for JAX-RS. I'm not sure what business logic your servlets currently perform, but this option addresses your servlet mapping question and may be appropriate.

@Path("/users/{id}")
public class User { 

    @Path("a")
    public String doA(@PathParam("id") final int id) { ... }

    @Path("b")
    public String doB(@PathParam("id") final int id) { ... }

}

Answer 2

I don't think it's possible. Either use the UrlRewriteFilter or some framework like Spring-MVC that is capable of mapping more complex URLs