爱码博阁

1、导入依赖

<?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">
    <parent>
        <artifactId>cloud2020</artifactId>
        <groupId>com.laoxu.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-gateway-gateway9527</artifactId>

    <dependencies>
        <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.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>
        <dependency>
            <groupId>com.laoxu.springcloud</groupId>
            <artifactId>cloud-api-common</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>
</project>

2、配置端口

server:
  port: 9527

spring:
  application:
    name: cloud-gateway
  cloud:
    gateway:
      routes:
        - id: payment_routh # payment_route  路由的ID,没有固定的规则但要求唯一
          uri: http://localhost:8001        #匹配后提供服务的路径地址
          predicates:
            - Path=/payment/get/**          #断言，路径相匹配进行路由

        - id: payment_routh2 # payment_route
          uri: http://localhost:8001
          predicates:
              - Path=/payment/lb/**
eureka:
  instance:
    hostname: cloud-gateway-service
  client:
    # 将自己注册进eureka中心
    register-with-eureka: true
    # 是否抓取注册信息，默认为true
    fetch-registry: true
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka, http://eureka7002.com:7002/eureka

3、创建启动类

package com.laoxu.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

@SpringBootApplication
@EnableEurekaClient
public class GatewayMain9527 {
    public static void main(String[] args) {
        SpringApplication.run(GatewayMain9527.class, args);
    }
}

4、访问：http://localhost:8001/payment/get/31 能成功调用

5、访问：http://localhost:9527/payment/get/31 也能成功调用

不再暴露8001真实端口，全部转成网关9527来进行匹配调用

6、访问：http://localhost:8001/payment/lb

7、访问：http://localhost:9527/payment/lb

以上的yml配置文件配置方式

以下是硬编码的形式配置路由

package com.laoxu.springcloud.config;

import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.cloud.gateway.route.builder.RouteLocatorBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class GatewayConfig {

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

访问：http://localhost:9527/guonei 会跳转到百度新闻-国内栏

动态路由：

通过注册的服务名动态的调用服务（网关负载均衡）

配置开启网关服务发现 discovery.locator.enabled = true
配置路由与服务名匹配

server:
  port: 9527

spring:
  application:
    name: cloud-gateway
  cloud:
    gateway:
      discovery:
        locator:
          enabled: true
      routes:
        - id: payment_routh # payment_route  路由的ID,没有固定的规则但要求唯一
#          uri: http://localhost:8001        #匹配后提供服务的路径地址
          uri: lb://cloud-payment-service    #匹配后提供服务的路由地址
          predicates:
            - Path=/payment/get/**          #断言，路径相匹配进行路由

        - id: payment_routh2 # payment_route
#          uri: http://localhost:8001
          uri: lb://cloud-payment-service    #匹配后提供服务的路由地址
          predicates:
              - Path=/payment/lb/**
eureka:
  instance:
    hostname: cloud-gateway-service
  client:
    # 将自己注册进eureka中心
    register-with-eureka: true
    # 是否抓取注册信息，默认为true
    fetch-registry: true
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka, http://eureka7002.com:7002/eureka