SpringCloud Feign的使用代码实例

1.官方文档

https://cloud.spring.io/spring-cloud-static/spring-cloud-openfeign/2.2.2.RELEASE/reference/html/

2.添加依赖

<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId></dependency><dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId></dependency><dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId></dependency>

3.添加启动类注解

import org.mybatis.spring.annotation.MapperScan;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.cloud.openfeign.EnableFeignClients;@SpringBootApplication//@MapperScan('cn.ytheng.order_service')@EnableFeignClientspublic class OrderServiceApplication { public static void main(String[] args) { SpringApplication.run(OrderServiceApplication.class, args); }}

4.添加Feign接口

import org.springframework.cloud.openfeign.FeignClient;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RequestParam;/** * * 商品服务客户端 * product-service: 调用服务名称，即spring.application.name * */@FeignClient(name = 'product-service')public interface ProductClient { @GetMapping('/api/v1/product/find') String getById(@RequestParam('id') int id);}

5.添加Controller

import cn.theng.order_service.service.ProductClient;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.PostMapping;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.RestController;@RestController@RequestMapping('/api/v1/order')public class ProductOrderController { @Autowired private ProductClient productClient; @PostMapping('/test2') public Object test2(@RequestParam('product_id') int productId) { String product = productClient.getById(productId); return 'success'; }}

6.添加application.yml配置

server: port: 8781eureka: client: serviceUrl: defaultZone: http://localhost:8761/eureka/spring: application: name: order-service#设置调用服务超时时间#product-service为服务名称，也可以设置为默认值defaultfeign: client: config: product-service: connectTimeout: 5000 readTimeout: 11000

7.访问地址

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持好吧啦网。