springcloud|Spring Cloud OpenFeign(负载均衡器） cloud|负载均衡|eureka|spring

1 OpenFeign简介 OpenFeign是一种声明式、模板化的HTTP客户端。在Spring Cloud中使用OpenFeign，可以做到使用HTTP请求访问远程服务，就像调用本地方法一样的，开发者完全感知不到这是在调用远程方法，更感知不到在访问HTTP请求。
项目结构

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1在pom.xml中添加相关依赖

org.springframework.boot spring-boot-starter-web org.springframework.cloud spring-cloud-starter-netflix-eureka-client org.springframework.cloud spring-cloud-starter-openfeign

2在application.yml进行配置
主要是配置了端口和注册中心地址。

server: port: 8085 spring: application: name: springcloud-openfeign eureka: client: register-with-eureka: true fetch-registry: true service-url: defaultZone: http://localhost:8081/eureka/

3编写openfeign调用接口

package com.example.springcloudribbon.service; import org.springframework.cloud.openfeign.FeignClient; import org.springframework.stereotype.Component; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; @FeignClient(name = "serviceA") @Component public interface MyInfo {@RequestMapping(value = "https://www.it610.com/a", method = RequestMethod.GET) String getUser(); }

4编写controller

package com.example.springcloudribbon.controller; import com.example.springcloudribbon.service.MyInfo; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; import javax.annotation.Resource; @RestController public class TestController {@Resource MyInfo myInfo; @GetMapping("/test") public String getTest() {System.out.println("test-openfeign"); String result=myInfo.getUser(); System.out.println(result); return result; }@GetMapping("/test1") public String getTest1() {return "test1"; } }

5 启动项目访问 url http://localhost:8085/test【springcloud|Spring Cloud OpenFeign(负载均衡器）】