搭建项目（略）

gatewa配置文件

server:
  port: 9999
spring:
  application:
    name: gateway
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848
        username: nacos
        password: nacos
    gateway:
      routes:
        - id: api-service1
          uri: lb://user-login-api    #服务名
          predicates:
            - Path=/user_login/**    #匹配接口的访问路径
        - id: api-service2
          uri: lb://user-regist-api
          predicates:
            - Path=/user_regist/**
        - id: api-service3
          uri: lb://product-api
          predicates:
            - Path=/product/**

product-api配置文件

server:
  port: 8003
spring:
  application:
    name: product-api
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848
        username: nacos
        password: nacos

controller

@RestController
@CrossOrigin
@RequestMapping("/product")
public class ProductController {

    @GetMapping("/list")
    public ResultVo list(){
        System.out.println("product....list");
        return new ResultVo(0,"查询商品列表成功",null);
    }


    @GetMapping("/get/{id}")
    public ResultVo get(@PathVariable("id") Integer id){
        System.out.println("product....get");
        return new ResultVo(0,"查询商品详情成功",null);
    }
}

postma测试