本文是介绍一下SpringCloud Gateway简单路由转发使用。

SpringCloud Gateway简介

SpringCloud是基于Spring Framework 5，Project Reactor和Spring Boot 2.0构建，目标是用于替代zuul。

官方文档

官方文档地址：cloud.spring.io/spring-clou…

在官方文档上是这样介绍Spring Cloud Gateway的：

该项目提供了一个用于在Spring MVC之上构建API网关的库。Spring Cloud Gateway旨在提供一种简单而有效的方式来路由到API，并为他们提供横切关注点。）

入门案例

接下来，介绍一下简单使用SpringCloud Gateway路由功能（本文使用SpringBoot2.0.0.RELEASE和SpringCloud Finchley.RC1版本）。

创建项目

新建一个项目，项目种加入SpringCloud Gateway依赖，完整pom如下:

<?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><groupId>com.dalaoyang</groupId><artifactId>springcloud_gateway</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>springcloud_gateway</name><description>springcloud_gateway</description><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.0.0.RELEASE</version><relativePath/> <!-- lookup parent from repository --></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.RC1</spring-cloud.version></properties><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-gateway</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-devtools</artifactId><scope>runtime</scope></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>
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SpringBoot主程序

在类中配置路由

主程序中加入了一种配置路由的方法，利用@Bean的方式自定义RouteLocator。

package com.dalaoyang;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.cloud.gateway.route.builder.RouteLocatorBuilder;
import org.springframework.context.annotation.Bean;@SpringBootApplication
public class SpringcloudGatewayApplication {public static void main(String[] args) {SpringApplication.run(SpringcloudGatewayApplication.class, args);}@Beanpublic RouteLocator customRouteLocator(RouteLocatorBuilder builder) {return builder.routes().route(r -> r.path("/jianshu").uri("http://www.jianshu.com/u/128b6effde53")).build();}}
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在配置文件中配置：

server:port: 8888spring:application:name: gateway-servicecloud:gateway:routes:- id: dalaoyanguri: http://www.dalaoyang.cn/predicates:- Path=/dalaoyang/**- id: juejinuri: https://juejin.im/user/5aa50b96f265da23866f836epredicates:- Path=/juejin/**复制代码

运行测试

到这里其实就配置完成了

访问http://localhost:8888/dalaoyang 自动跳转到了我的博客首页

访问http://localhost:8888/jianshu 自动跳转到了我的简书首页

访问http://localhost:8888/juejin 自动跳转到了我的掘金首页

源码下载：大老杨源码