springcloud-OpenFeign服务调用

　　1.创建模块

　　2.引入依赖

<dependencies>
        <dependency>
            <groupId>cn.aib.springcloud</groupId>
            <artifactId>springclud-api-common</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <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-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--   引入eureka客户端     -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <!--  open feign      -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>

    </dependencies>

　　3.改配置

server:
  port: 80


eureka:
  client:
    register-with-eureka: false   #是否将自己注册到注册中心,集群必须设置为true配合ribbon
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka, http://eureka7002.com:7002/eureka

　　由于Feign是webService客户端，不需要到注册中心上注册。但如果是直接的Ribbon+Eureka的话，调用方是需要到注册中心注册的。

　　4.主启动

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

　　记得开启Feign

　　5.写业务

@Component
@FeignClient("cloud-payment-service")
public interface PaymentFeignService {

    @GetMapping("/payment/get/{id}")
    public CommonResult selectPayment(@PathVariable("id") Long id);
}

@RestController
public class FeignController {
    @Resource
    private PaymentFeignService paymentFeignService;

    @GetMapping(value = "/consumer/payment/get/{id}")
    public CommonResult<Payment> getPaymentById(@PathVariable("id") Long id){

        return paymentFeignService.selectPayment(id);
    }

}

　　6.测试。