SpringCloud - Feign

package com.imooc.product.controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class ServerController {
    @GetMapping("/msg")
    public String msg() {
        return "this is product' msg";
    }
}

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

package com.imooc.order;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.feign.EnableFeignClients;
@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
public class OrderApplication {
  public static void main(String[] args) {
    SpringApplication.run(OrderApplication.class, args);
  }
}

package com.imooc.order.client;
import com.imooc.order.dataobject.ProductInfo;
import org.springframework.cloud.netflix.feign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import java.util.List;
@FeignClient(name = "product")
public interface ProductClient {
    @GetMapping("/msg")
    String productMsg();
    @PostMapping("/product/listForOrder")
    List<ProductInfo> listForOrder(@RequestBody List<String> productIdList);
}

package com.imooc.order.controller;
import com.imooc.order.client.ProductClient;
import com.imooc.order.dataobject.ProductInfo;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.Arrays;
import java.util.List;
@RestController
@Slf4j
public class ClientController {
    @Autowired
    private ProductClient productClient;
    @GetMapping("/getProductMsg")
    public String getProductMsg() {
        String response = productClient.productMsg();
        log.info("response={}", response);
        return response;
    }
    @GetMapping("/getProductList")
    public String getProductList() {
        List<ProductInfo> productInfoList = productClient.listForOrder(Arrays.asList("164103465734242707"));
        log.info("response={}", productInfoList);
        return "ok";
    }
}