<dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
</dependency>

feign:sentinel:enabled: true

@FeignClient(value = "nacos-client-app", contextId = "nacosHelloClient", fallback = NacosHelloClientFallback.class
)
public interface NacosHelloClient {@GetMapping("/hello/index")String hello() ;@GetMapping("/hello/exception")String exception() ;
}

@Component
public class NacosHelloClientFallback implements NacosHelloClient {@Overridepublic String hello() {return "fallback hello ret value";}@Overridepublic String exception() {return "fallback exception ret value";}
}