一、创建SpringBoot的项目springcloud-eureka-customer，操作同

二、配置文件

    
        
     
      4.0.0
         
             
      
       org.springframework.boot
              
      
       spring-boot-starter-parent
              
      
       2.1.4.RELEASE
              
       
          
         
     
      com.jane
         
     
      springcloud-eureka-customer
         
     
      0.0.1-SNAPSHOT
         
     
      springcloud-eureka-customer
         
     
      Demo project for Spring Boot
         
             
      
       1.8
              
      
       Greenwich.SR1
          
         
             
                  
       
        org.springframework.cloud
                   
       
        spring-cloud-starter-netflix-eureka-client
               
              
                  
       
        org.springframework.boot
                   
       
        spring-boot-starter-test
                   
       
        test
               
              
                  
       
        org.springframework.boot
                   
       
        spring-boot-starter-web
               
              
              
                  
       
        org.springframework.cloud
                   
       
        spring-cloud-starter-openfeign
                   
       
        2.0.2.RELEASE
               
              
                  
       
        org.springframework.cloud
                   
       
        spring-cloud-openfeign-core
                   
       
        2.0.2.RELEASE
               
              
          
         
             
                  
                       
        
         org.springframework.cloud
                        
        
         spring-cloud-dependencies
                        
        
         ${spring-cloud.version}
                        
        
         pom
                        
        
         import
                    
               
          
         
             
                  
                       
        
         org.springframework.boot
                        
        
         spring-boot-maven-plugin
                    
               
          
     
    

2、启动文件

package com.jane.springcloudeurekacustomer;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.cloud.client.discovery.EnableDiscoveryClient;import org.springframework.cloud.openfeign.EnableFeignClients;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.ComponentScans;@SpringBootApplication@EnableDiscoveryClient@EnableFeignClients(basePackages = "com.jane")@ComponentScan("com.jane")public class SpringcloudEurekaCustomerApplication {    public static void main(String[] args) {        SpringApplication.run(SpringcloudEurekaCustomerApplication.class, args);    }}

3、application.properties

server.port=6020spring.application.name=springcloud-eureka-customereureka.client.service-url.defaultZone=http://127.0.0.1:6001/eureka/eureka.client.fetchRegistry=true

4、Fegin客户端TestFeginServiceClient

package com.jane.service;import org.springframework.cloud.openfeign.FeignClient;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;@FeignClient("springcloud-eureka-client-order")public interface TestFeginServiceClient {    @RequestMapping(value = "/test", method = RequestMethod.GET)    public String test();}

5、调用文件TestController

package com.jane.controller;import com.jane.service.TestFeginServiceClient;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RestController;@RestControllerpublic class TestController {    @Autowired    TestFeginServiceClient testService;    /**     * 普通Restful     * @return     */    @RequestMapping(value = "/local", method = RequestMethod.GET)    public String local() {        return "本地local调用";    }    /**     * 利用Fegin客户端实现RPC调用order服务     * @return     */    @RequestMapping(value = "/order/test", method = RequestMethod.GET)    public String test(){        return testService.test();    }}

三、启动文件

四、FeignClient本身集成了本地负载均衡Netflix的Ribbon，所以可以轻松实现负载均衡。

2、消费服务多次调用结果如下：