SpringCloudGateway筆記(1)-介紹與基礎使用

Spring Cloud Gateway 介紹和基礎使用

簡介

Spring Cloud Gateway是Spring官方團隊推出的網關框架，用於取代Spring Cloud Netflix Zuul

Spring Cloud Gateway的特徵：

• 基於Spring Framework 5、Project Reactor和Spring Boot 2.0構建
• 能夠匹配任何請求屬性上的路由。
• 謂詞和過濾器是特定於路由的。
• Hystrix斷路器集成。
• Spring Cloud DiscoveryClient集成
• 易於編寫謂詞和過濾器
• 請求速率限制
• 路徑重寫

作爲網關組件支持websocket，灰度發佈，限流空指等功能

基礎使用

工程基於

spring boot 2.1.3.RELEASE

spring cloud Greenwich.SR1

STEP1 創建一個工程

<?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.mt.demo</groupId>
    <artifactId>spring-cloud-gateway-demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>spring-cloud-gateway-demo</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR1</spring-cloud.version>
    </properties>

    <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-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>

    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
        </repository>
    </repositories>

</project>

STEP2. 配置文件

spring:
  application:
    name: spring-cloud-gateway-demo
  cloud:
    gateway:
      discovery:
        locator:
          enabled: true #啓用路由訪問
          lower-case-service-id: true #啓動服務名小寫
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka/
  instance:
    instance-id: ${spring.cloud.client.ipAddress}:${server.port}
    prefer-ip-address: true
server:
  port: 10001

STEP3. 啓動註解

@EnableDiscoveryClient
@SpringBootApplication
public class SpringCloudGatewayDemoApplication {

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

}

STEP4. 驗證

啓動另外一個服務spring-cloud-client-demo

用postman請求

http://localhost:10001/spring-cloud-client-demo/demo/get?param=aaa

返回正確的請求結果。

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