1， 基于父工程，新建一个模块

2，pom文件添加依赖

         org.springframework.cloud      spring-cloud-starter-gateway              com.alibaba.cloud      spring-cloud-starter-alibaba-nacos-discovery      

3，添加配置

server: port: 9091spring: application:  name: gateway3 cloud:  nacos:   discovery:    server-addr: localhost:8848    namespace: c22e5019-0bee-43b1-b80b-fc0b9d847501    register-enabled: false  gateway:   routes:    - id: demo_route     uri: lb://demo     predicates:      - Path=/demo/**    - id: demo2_test     uri: lb://demo2     predicates:      - Path=/user/**

4，编写启动类

@SpringBootApplication@EnableDiscoveryClientpublic class Gateway3Application {  public static void main(String[] args) {        SpringApplication.run(Gateway3Application.class, args);  }}

5，访问http://localhost:9091/demo或http://localhost:9091/demo2路由到指定的服务