入门配置

1.新建Module

项目名称：cloud-gateway-gateway9527

鼠标点击父工程项目右击 —> New —> Module

具体创建步骤参考【搭建EurekaServer端服务注册中心】

2.添加pom.xml

注意：此处不能添加 spring-boot-starter-web 依赖因为 spring-cloud-starter-gateway 依赖中引入了 spring-boot-starter-webflux 依赖此时就不能引入 spring-boot-starter-web 依赖会有冲突

    <dependencies>
        <!--新增gateway-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </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>

3.添加application.yml

server:
  port: 9527
spring:
  application:
    name: cloud-gateway
  cloud:
    gateway:
      routes:
        - id: payment_routh #路由的ID，没有固定规则但要求唯一，建议配合服务名
          uri: http://localhost:8001   #匹配后提供服务的路由地址
          predicates:
            - Path=/payment/get/**   #断言,路径相匹配的进行路由

        - id: payment_routh2
          uri: http://localhost:8001
          predicates:
            - Path=/payment/lb/**   #断言,路径相匹配的进行路由

eureka:
  client:
    # 表示是否将自己注册进EurekaServer默认为true
    register-with-eureka: true
    # 是否从EurekaServer抓取已有的注册信息，默认为true。单节点无所谓，集群必须设置为true才能配合ribbon使用负载均衡
    fetch-registry: true
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka
  instance:
    instance-id: payment8001
    #访问路径可以显示IP地址
    prefer-ip-address: true
    #Eureka客户端向服务端发送心跳的时间间隔，单位为秒(默认是30秒)
    #lease-renewal-interval-in-seconds: 1
    #Eureka服务端在收到最后一次心跳后等待时间上限，单位为秒(默认是90秒)，超时将剔除服务
    #lease-expiration-duration-in-seconds: 2

4.添加主启动类

@SpringBootApplication
@EnableEurekaClient
public class GateWay9587Application {

    public static void main(String[] args) {
        SpringApplication.run(GateWay9587Application.class, args);
    }

}

5.启动并测试

启动Eureka注册中心：cloud-eureka-server7001，cloud-eureka-server7002
启动服务提供者：cloud-provider-hystrix-payment8001
启动网关：cloud-gateway-gateway9527
浏览器输入：http://localhost:9527/payment/get/1
返回如下内容：

{"code":200,"message":"查询成功,serverPort: 8001","data":{"id":1,"serial":"哈哈哈"}}

6.配置说明

Gateway网关路由有两种配置方式

6.1.在配置文件yml中配置

spring:
  application:
    name: cloud-gateway
  cloud:
    gateway:
      routes:
        - id: payment_routh #路由的ID，没有固定规则但要求唯一，建议配合服务名
          uri: http://localhost:8001   #匹配后提供服务的路由地址
          predicates:
            - Path=/payment/get/**   #断言,路径相匹配的进行路由

        - id: payment_routh2
          uri: http://localhost:8001
          predicates:
            - Path=/payment/lb/**   #断言,路径相匹配的进行路由

6.2.代码中注入RouteLocator的Bean

@Configuration
public class GateWayConfig {

    @Bean
    public RouteLocator routes(RouteLocatorBuilder builder) {
        return builder.routes()
                .route("circuitbreaker_route",r -> r.path("/guonei")
                        .uri("http://news.baidu.com/guonei"))
                .route("circuitbreaker_route1",r -> r.path("/guoji")
                        .uri("http://news.baidu.com/guoji"))
                .build();
    }

}