网关的功能

案例

创建网关

引入依赖

 <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
         <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-loadbalancer</artifactId>
        </dependency>

网关也要注册进nacos,gateway的负载均衡需要引入loadbalancer 创建启动类

package com.atguigu.gateway;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

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

修改配置文件

spring:
  profiles:
    include: route
  application:
    name: gateway
  cloud:
    nacos:
      server-addr: 127.0.0.1:8848
# localhost/api/order
server:
  port: 80

启动即可