简化RestTemplate调用形式
1. pom.xml
<!-- feign 声明式服务调用 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
2. application.yml
spring:
application:
name: feign-client
server:
port: 8801
3. FeginClientApplication.java
@SpringBootApplication
@EnableFeignClients
public class FeginClientApplication {
public static void main(String[] args) {
SpringApplication.run(FeginClientApplication.class, args);
}
}
@EnableFeignClients
启动Feign客户端
4. HelloServiceClient.java
@Service
@FeignClient("hello-service")
public interface HelloServiceClient {
@RequestMapping(method = RequestMethod.GET, value = "/hello")
String hi();
}
@FeignClient("hello-service")
指定注册服务的名字/hello
服务请求地址
注意:
@RequestMapping(method = RequestMethod.GET, value = "/hello")
1. 不能使用GetMapping
2. 需通过value指定请求路径
访问: http://localhost:8801/fegin/hi
Hello World!