Handling a path based URL in Java, with Jersey, Spring2.5 and StringTemplate:

@Path("users") @Singleton
public class SingletonUserResourceWithSpring
{
    private static final String OPENSOCIAL_MEDIATYPE = "application/atom+xml";
   
    @Inject private UserAccountService userAccountService;
    private StringTemplateGroup templates;
   
    public SingletonUserResourceWithSpring() {
        templates = new StringTemplateGroup("templates");
    }

    @GET @Path("/{uid}")
    @Produces(OPENSOCIAL_MEDIATYPE)   
    public String getByUID(@PathParam("uid") String uid) {
        UserAccount account = userAccountService.findByUID(uid);
        return renderToResponse(account);
    }

    private String renderToResponse(UserAccount account) {
        StringTemplate userxml = loadTemplate("templates/user_opensocial");
        userxml.setAttribute("accountName", account.getAccountName());
        userxml.setAttribute("uid", account.getUid());
        userxml.setAttribute("email", account.getEmail());
        userxml.setAttribute("firstName", account.getFirstName());
        userxml.setAttribute("lastName", account.getLastName());
        userxml.setAttribute("render_summary_flag", "yes");
        return userxml.toString();
    }

    private StringTemplate loadTemplate(String template) {
        return templates.getInstanceOf(template);
    }
}

That's not bad. It could be even tighter in Groovy. Tip of the hat to javakaffee and Paul Sandoz.