springcloud之服务调用openfeign

1.springcloud之使用openfeign调用各子服务接口

2.jar
<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
            <version>3.1.1</version>
        </dependency>
        <!--fegin组件不再使用Ribbon而是使用spring-cloud-loadbalancer-->
        <!--gateway 搭配 nacos 使用，也要加上此注解 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-loadbalancer</artifactId>
            <version>3.1.1</version>
        </dependency>

3.子服务 shop-product
@FeignClient(value = "shop-product", fallback = ProductServiceFallBack.class)
public interface ProductService {

    @GetMapping(value = "/product/{pid}")
    Product findByPid(@PathVariable("pid") Integer pid);

    @GetMapping("/seata/reduce")
   void reduceProduct(@RequestParam("pid") Integer pid, @RequestParam("num") int num);
}

4.
    @Autowired
    private ProductService productService;


5.@EnableFeignClients