• sentinel服务安装
  下载地址https://github.com/alibaba/Sentinel/releases
  下载完成后上传执行

java -jar sentinel-dashboard-1.6.1.jar

默认访问地址（ip:8080）：localhost:8080

• 所需依赖

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <version>0.9.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-starter-alibaba-sentinel -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
            <version>2.2.2.RELEASE</version>
        </dependency>

yml配置

server:
  port: 8888
spring:
  application:
    name: nacos-provider
  cloud:
    nacos:
      discovery:
        server-addr: 192.168.19.11:8848
    sentinel:
      transport:
        port: 8719
        dashboard: 192.168.19.11:8080

测试controller

package com.lenovo.controller;
import com.alibaba.csp.sentinel.annotation.SentinelResource;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class ProviderController {
    @GetMapping("/hi")
    @SentinelResource(value="hi")
    public String hi(@RequestParam(value = "name",defaultValue = "forezp",required = false)String name){
        return "hi "+name;
    }
}

按如图添加限流规则

然后多次快速访问nacos-provider的接口资源http://localhost:8762/hi，可以发现偶尔出现以下的信息：
Blocked by Sentinel (flow limiting)
正常的返回逻辑为
hi forezp
由以上可只，接口资源/hi的限流规则起到了作用。