openFeign的使用

作用

　　类似ribbon提供客户端的负载均衡

1:pom

 <!---  eureka-client  -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

        <!-- openfeign  -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>

2:yml

server:
  port: 80 #服务端口号

spring:
  application:
    name: cloud-order-service

eureka:
  client:
    fetch-registry: true
    register-with-eureka: true
    service-url:
      defaultZone: http://eureka7002.com:7002/eureka/,http://eureka7001.com:7001/eureka/

3:seivice接口

@Component
@FeignClient(value = "CLOUD-PAYMENT-SERVICE")
public interface PaymentService {

    @GetMapping(value = "/payment/get/{id}")
    BaseResult findById(@PathVariable("id") Integer id);
}　

　　@FeignClient　　//#标记该类为openFeign的接口
　　(value = "CLOUD-PAYMENT-SERVICE")　　//#eureka服务的提供方

4：启动类

@SpringBootApplication
@EnableFeignClients
public class FeignOrderMain80 {

    public static void main(String[] args) {
        SpringApplication.run(FeignOrderMain80.class);
    }
}

　　@EnableFeignClients　　#开启使用openFeign