负载均衡二Feign

Feign实现了Ribbon不用拼接url通过调用接口直接调用方法传入参数一样的，可以通过官方文档自己学习

复制一份order

修改不要的只留一个主配置类，application.yml

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:1000/eureka/#注册中心地址
  instance:
    ip-address: true #使用ip配置
    instance-id: order-server2 #指定服务的id
server:
  port: 3001
spring:
  application:
    name: order-server2

这里不是做集群所以我们需要更改

spring:
  application:
    name: order-server2

1.导包

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

3.需要在主配置类上打入标签

package cn.jiedada;

import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.openfeign.EnableFeignClients;

@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients(basePackages = "cn.jiedada.Feign")
public class EurekaOrderService3001 {
    public static void main(String[] args) {
        new SpringApplicationBuilder(EurekaOrderService3001.class).web(true).run(args);
    }

}

4.自己写一个接口打入标签

package cn.jiedada.Feign;

import cn.jiedada.domain.User;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

//添加集群application的名称
@FeignClient("USER-SERVER")
public interface UserFeginClient {
    //添加路劲
    @RequestMapping("/provider/user/{id}")
    public User getUserById(@PathVariable("id")Long id);
}

 4.Controller

package cn.jiedada.web.controller;

import cn.jiedada.Feign.UserFeginClient;
import cn.jiedada.domain.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
@RequestMapping("/customer")
public class OrderController {
    @Autowired
    private UserFeginClient userFeginClient;

    @RequestMapping("/user/{id}")
    public User getUserById(@PathVariable("id")Long id){
        return userFeginClient.getUserById(id);
    }
}