实现Feign远程调用后台接口功能

通过serviceId自动查询erueka中注册的服务列表并负载均衡调用

src/main/java/com/yingxin/springcloudconsumer/SpringCloudConsumerApplication.java

@@ -2,8 +2,12 @@ package com.yingxin.springcloudconsumer;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
+import org.springframework.cloud.openfeign.EnableFeignClients;
 
 @SpringBootApplication
+@EnableEurekaClient
+@EnableFeignClients
 public class SpringCloudConsumerApplication {
 
     public static void main(String[] args) {

src/main/java/com/yingxin/springcloudconsumer/controller/RestApi.java

+package com.yingxin.springcloudconsumer.controller;
+
+import com.yingxin.springcloudconsumer.service.HelloService;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class RestApi {
+
+    private final HelloService helloService;
+
+    public RestApi(HelloService helloService) {
+        this.helloService = helloService;
+    }
+
+    @GetMapping("/consumer")
+    public String helloConsumer() {
+        return helloService.hello();
+    }
+}

src/main/java/com/yingxin/springcloudconsumer/service/HelloService.java

+package com.yingxin.springcloudconsumer.service;
+
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.GetMapping;
+
+@FeignClient("spring-cloud-server-HelloWorld")
+public interface HelloService {
+
+    @GetMapping("hello")
+    String hello();
+}