帮我写一套springcloud整合了sentinel的代码 有详细试列

好的，以下是Spring Cloud整合Sentinel的示例代码：

1. 引入依赖

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

2. 在启动类上添加注解

@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
@EnableCircuitBreaker
@EnableBinding({Source.class, Sink.class})
@EnableAspectJAutoProxy(proxyTargetClass = true)
@ServletComponentScan
@EnableAsync
@EnableScheduling
@SentinelRestTemplate
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

    @Bean
    public RestTemplate restTemplate() {
        return new RestTemplate();
    }

}

3. 配置Sentinel

spring.cloud.sentinel.transport.dashboard = localhost:8080
spring.cloud.sentinel.transport.port = 8719

4. 配置Feign

@FeignClient(name = "service-name", fallback = ServiceFallback.class)
public interface ServiceClient {

    @GetMapping("/hello")
    String hello();

}

5. 配置Hystrix

@HystrixCommand(fallbackMethod = "fallback")
@GetMapping("/hello")
public String hello() {
    return restTemplate.getForObject("http://service-name/hello", String.class);
}

public String fallback() {
    return "fallback";
}

6. 配置Sentinel Dashboard

打开浏览器，访问http://localhost:8080即可看到Sentinel Dashboard。

以上是一个简单的示例，实际使用中还需要根据具体需求进行配置和调整。