spring cloud gateway整合sentinel实现网关限流

<dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-gateway</artifactId>
    </dependency>
    <dependency>
      <groupId>com.alibaba.cloud</groupId>
      <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
    </dependency>
    <dependency>
      <groupId>com.alibaba.cloud</groupId>
      <artifactId>spring-cloud-alibaba-sentinel-gateway</artifactId>
    </dependency>
    <dependency>
      <groupId>com.alibaba.cloud</groupId>
      <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
    </dependency>

server:
 port: 9092
spring:
 cloud:
  nacos:
   discovery:
    register-enabled: false
    server-addr: localhost:8848
    namespace: c22e5019-0bee-43b1-b80b-fc0b9d847501
  sentinel:
   transport:
    dashboard: localhost:8080
    port: 8719
   scg:
    fallback:
     mode: response
     response-status: 455
     response-body: error!
  gateway:
   routes:
    - id: demo_route
     uri: lb://demo
     predicates:
      - Path=/demo/**
    - id: demo2_test
     uri: lb://demo2
     predicates:
      - Path=/user/**
 application:
  name: gateway-sentinel

@SpringBootApplication
@EnableDiscoveryClient
public class GatewaySentinelApplication {
  public static void main(String[] args) {
    
    SpringApplication.run(GatewaySentinelApplication.class, args);
  }
}