@RequestMapping("/resource1")
public interface Api {
    @RequestMapping(method = RequestMethod.POST)
    Resource1 getResource1();
}

@RestController
public class Controller implements Api {
    @Override
    public Resource1 getResource1() {
         return null;
    }
}

@Configuration
public class Config {
    @Bean
    public Api api() {
         return RestClientFactory.createRestClientBasedOnAnnotations(Api.class);
    }
}