openfeign例子

以下是一个使用OpenFeign调用Restful服务的例子：

1.添加依赖

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

2.创建Feign接口

@FeignClient(name = "provider-service")
public interface ProviderService {

    @GetMapping("/hello")
    String hello();
}

3.在启动类上添加@EnableFeignClients注解开启Feign功能

@SpringBootApplication
@EnableFeignClients
public class ConsumerApplication {

    public static void main(String[] args) {
        SpringApplication.run(ConsumerApplication.class, args);
    }
}

4.在Controller中注入Feign接口并调用

@RestController
public class ConsumerController {

    @Autowired
    private ProviderService providerService;

    @GetMapping("/hello")
    public String hello() {
        return providerService.hello();
    }
}