SpringCloud Gateway之服务注册与发现(Finchley版本)

短命女 2023-02-13 05:56 50阅读 0赞

**1.启动服务eurka-server、eureka-service-a、eureka-service-b**

**2.服务eureka-gateway实现。**

pom.xml

<?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 https://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>2.0.5.RELEASE</version>
            <relativePath/> 
        </parent>
        <groupId>com.cxb</groupId>
        <artifactId>springcloud</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <name>eureka-gateway</name>
        <description>Demo project for Spring Boot</description>
    
        <properties>
            <java.version>1.8</java.version>
        </properties>
    
        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>Finchley.SR1</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>
    
        <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>
        </dependencies>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    
    </project>

application.yml 这里配置路由的规则

server:
      port: 8781
    
    spring:
      application:
        name: eureka-gateway
      cloud:
        gateway:
          discovery:
            locator:
              enabled: true
              lowerCaseServiceId: true
          routes:
          - id: eureka-service-a
            uri: lb://eureka-service-a
            predicates:
              - Path= /api-a/**
            filters:
              - StripPrefix=1
          - id: eureka-service-b
            uri: lb://eureka-service-b
            predicates:
              - Path= /api-b/**
            filters:
              - StripPrefix=1
    
    eureka:
      client:
        serviceUrl:
          defaultZone: http://localhost:8761/eureka/

EurekaGatewayApplication启动类

package com.cxb.springcloud;
    
    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;
    import org.springframework.web.bind.annotation.RestController;
    
    @SpringBootApplication
    @RestController
    public class EurekaGatewayApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(EurekaGatewayApplication.class, args);
        }
    
        /**
         * 使用了一个RouteLocatorBuilder的bean去创建路由，除了创建路由RouteLocatorBuilder
         * 可以让你添加各种predicates和filters，predicates断言的意思，顾名思义就是根据
         * 具体的请求的规则，由具体的route去处理，filters是各种过滤器，用来对请求做各种判断和修改。
         * @param builder
         * @return
         */
        @Bean
        public RouteLocator myRoutes(RouteLocatorBuilder builder) {
            return builder.routes()
                    .route(p -> p
                            .path("/get")
                            // 该filter会将请求添加一个header,key为hello，value为world。
                            .filters(f -> f.addRequestHeader("Hello", "World"))
                            .uri("http://localhost:8770/hi"))
                    .build();
        }
    
    }

测试：服务注册成功

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMzcxNzY2_size_16_color_FFFFFF_t_70][]

这里访问服务eureka-gateway本身，/get接口，会调用服务a的接口

![2020052720474713.png][]

[http://desktop-u2hs0mo:8781/api-a/hi][http_desktop-u2hs0mo_8781_api-a_hi] 调用服务a的接口

![20200527204811636.png][]

[http://desktop-u2hs0mo:8781/api-b/hi][http_desktop-u2hs0mo_8781_api-b_hi]  调用服务b的接口

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMzcxNzY2_size_16_color_FFFFFF_t_70 1][]

验证成功！

**[学习相关代码下载][Link 1]**

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMzcxNzY2_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200527204650784.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMzcxNzY2,size_16,color_FFFFFF,t_70
[2020052720474713.png]: https://img-blog.csdnimg.cn/2020052720474713.png
[http_desktop-u2hs0mo_8781_api-a_hi]: http://desktop-u2hs0mo:8781/api-a/hi
[20200527204811636.png]: https://img-blog.csdnimg.cn/20200527204811636.png
[http_desktop-u2hs0mo_8781_api-b_hi]: http://desktop-u2hs0mo:8781/api-b/hi
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMzcxNzY2_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200527204829925.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMzcxNzY2,size_16,color_FFFFFF,t_70
[Link 1]: https://github.com/ChenXbFrank/SpringCloudFinchley-Code