SpringCloud 中Feign的简单使用

1. 导入依赖

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

2. 启动类添加注解@EnableFeignClients

   @SpringBootApplication
   @EnableFeignClients
   public class ClientdemoApplication {
   
       public static void main(String[] args) {
           SpringApplication.run(ClientdemoApplication.class, args);
       }
   
   }
   

3. 创建API接口

   //方式一：配置url
   //@FeignClient(name = "eurekaserver",url = "http://eureka1.com:8081")
   //方式二：配置name，此name要与要与服务名的纯小写相同
   @FeignClient(name = "eurekaserver")
   public interface FeignTest {
   
       @GetMapping(path = "/shello")
       String shello();
   
   }
   

4. 注入调用

   @Autowired
   private FeignTest feignTest;
   
   public Object service4() {
       String hello = feignTest.shello();
       System.out.println(hello);
       return "service3: " + hello;
   }