本博客主要是搭建一个gateway的demo，记录了自己踩过的各种坑

项目目录 ：

gateway-service中的依赖：

注意此处不可添加spring-boot-starter-web的依赖，否则会报错。gateway是用过webflux实现 ，和spring MVC有冲突

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<artifactId>gateway-service</artifactId>
	<version>1.0.0.RELEASE</version>
	<packaging>jar</packaging>

	<name>gateway-service</name>
	<description>Demo project for Spring Cloud</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.7.RELEASE</version>
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
		<spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-actuator</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-gateway</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>${spring-cloud.version}</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>


</project>

yml中的配置：yml中配置了，主程序无需改动

spring:
  application:
    name: gateway-service
  cloud:        # spring cloud gateway 路由配置方式
    gateway:
      discovery:  #是否与服务发现组件进行结合，通过 serviceId(必须设置成大写) 转发到具体的服务实例。默认为false，设为true便开启通过服务中心的自动根据 serviceId 创建路由的功能。
        locator:
          enabled: true     #路由访问方式：http://Gateway_HOST:Gateway_PORT/大写的serviceId/**，其中微服务应用名默认大写访问。
      routes:
      - id: 163                     #网关路由到网易官网
        uri: http://www.163.com/
        predicates:
          - Path=/163/**
      - id: ORDER-SERVICE           #网关路由到订单服务order-service
        uri: lb://ORDER-SERVICE   #lb开头是使用到了eurake，ws是用到了websocket
        predicates:
          - Path=/ORDER-SERVICE/**
      #- id: wss
       # uri: lb:ws://ORDER-SERVICE  #websocket形式
        #predicates:
         # - Path=/ORDER-SERVICE/**
      - id: wss1
        uri: ws://localhost:5100
        predicates:
          - Path=/websocket
server:
  port: 5001

logging:
  level:
    org.springframework.cloud.gateway: trace
    org.springframework.http.server.reactive: debug
    org.springframework.web.reactive: debug
    reactor.ipc.netty: debug

eureka:
  client:
    service-url:
      defaultZone: http://localhost:5000/eureka/
feign:
  hystrix:
    enabled: true

如果想要实现一些权限的过滤，可以使用自定义过滤器，详情可以看下章