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目录

🍿1.Sentinel是什么

🧂2.特点 

🧈3.下载 

 🌭4.sentinel启动

🥓5.实例演示 

1.Sentinel是什么

2.特点 

3.下载 

官网：https://github.com/alibaba/Sentinel/releases/tag/1.7.0

小张提示：如果GitHub打不开，记得更改hosts文件~ 

 4.sentinel启动

• 1.直接使用java -jar启动sentinel的jar包

• 2.访问浏览器localhost:8080 

• 3.登录 

5.实例演示 

1.创建工程

2.加pom

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <!--springCloud alibaba Naocs-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!--持久化-->
        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-datasource-nacos</artifactId>
        </dependency>
        <!--Sentinel-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
        </dependency>
        <!--openFeign-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
    </dependencies>

3.改yml

server:
  port: 8401

spring:
  application:
    name: cloudalibaba-sentinel-service

  cloud:
    nacos:
      discovery:
        #nacos服务注册中心
        server-addr: 192.168.20.50:1111
    sentinel:
      transport:
        #sentinel dashboard地址
        dashboard: localhost:8080
        #默认8719端口，假如被占用会自动从8719开始依次+1扫描，直至找到未被占用的端口
        port: 8719

management:
  endpoints:
    web:
      exposure:
        include: '*'

4.主启动类

@SpringBootApplication
@EnableDiscoveryClient
public class MainApp8401 {
    public static void main(String[] args) {
        SpringApplication.run(MainApp8401.class);
    }
}

5.业务类

@RestController
public class FlowLimitController {

    @GetMapping("/testA")
    public String getTestA(){
        return "-----TestA------";
    }

    @GetMapping("/testB")
    public String getTestB(){
        return "-----TestB------";
    }
}

6.测试

注意：执行一下controller再访问