接着前两节： Eureka服务注册：https://blog.csdn.net/weixin_37460672/article/details/90414085 Ribbon负载均衡：https://blog.csdn.net/weixin_37460672/article/details/90451192 1.创建Module工程的springboot项目eureka-feign-client 2.pom文件
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>com.wl</groupId> <artifactId>springcloud20190521</artifactId> <version>1.0-SNAPSHOT</version> </parent> <groupId>com.wl</groupId> <artifactId>eureka-feign-client</artifactId> <version>0.0.1-SNAPSHOT</version> <name>eureka-feign-client</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-feign</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>3.application.yml配置文件配置程序名eureka-feign-client,端口号8765，服务注册地址http://localhost:8761/eureka/
spring: application: name: eureka-feign-client server: port: 8765 eureka: client: service-url: defaultZone: http://localhost:8761/eureka/4.启动类加注解@EnableEurekaClient开启EurekaClient功能，加注解@EnableFeignClients开启FeignClient功能
@EnableEurekaClient @EnableFeignClients @SpringBootApplication public class EurekaFeignClientApplication { public static void main(String[] args) { SpringApplication.run(EurekaFeignClientApplication.class, args); } }5.已经具备Feign功能，现在实现一个简单的FeignClient，新建EurekaClientFeign接口，接口加注解@FeignClient，其中value为远程调用其他服务名，FeignConfig.class为FeignClient的配置类，接口内有一个sayHiFromClientEureka（）方法，该方法通过Feign来调用eureka-client服务的"/hi"的API接口
/** * Created by lailai on 2019/5/23. */ @FeignClient(value = "eureka-client",configuration = FeignConfig.class) public interface EurekaClientFeign { @GetMapping("hi") String sayHiFromClientEureka(@RequestParam(value = "name") String name); }6.FeignConfig配置类，注入Retryer的bean，远程调用失败后会重试
/** * Created by lailai on 2019/5/23. */ @Configuration public class FeignConfig { @Bean public Retryer feignRetryer(){ return new Retryer.Default(100,SECONDS.toMillis(1),5); } }7.在Service层注入EurekaFeignClient，调用sayHiFromClientEureka（）方法
/** * Created by lailai on 2019/5/23. */ @Service public class HiService { @Autowired private EurekaClientFeign eurekaClientFeign; public String sayHi(String name) { return eurekaClientFeign.sayHiFromClientEureka(name); } }8.创建HiController调用HiService，HiService通过EurekaClientFeign远程调用eureka-client服务的API接口"/hi"
/** * Created by lailai on 2019/5/23. */ @RestController public class HiController { @Autowired private HiService hiService; @RequestMapping("hi") public String sayHi(@RequestParam(defaultValue = "admin",required = false) String name){ return hiService.sayHi(name); } }9.启动eureka-server工程端口8761，启动两个eureka-client工程，端口分别为8762，8763，启动eureka-feign-client工程，端口8765 10.轮流访问http://localhost:8765/hi?name=weilai地址
