创建 Eureka-Consumer

1. 创建springboot工程，引入依赖

     <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.10.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>Dalston.SR4</spring-cloud.version>
    </properties>
   
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka-server</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</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>
   

2. 启动类上写注解 @@EnableEurekaClient

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

3. 修改application配置文件，添加配置

    spring.application.name=eureka-consumer
    server.port=8082
    eureka.client.serviceUrl.defaultZone=http://eureka-server.jetbrains.org.cn/eureka/
   

4. 启动效果，可以看到没有任何服务注册上来

5. spring-cloud-eureka-consumer 调用 spring-cloud-eureka-client 中的接口

    @GetMapping("/consumer")
    public String dc() {
   
        //获取具体的服务提供者的地址
        ServiceInstance serviceInstance = loadBalancerClient.choose("eureka-client");
        String url = "http://" + serviceInstance.getHost() + ":" + serviceInstance.getPort() + "/dc";//拼接具体的请求地址
   
        System.out.println(url);
   
        return restTemplate.getForObject(url, String.class);
   
    }
   

思考

根据上述方式，我们实现了简单的服务调用，那么有个疑问，如果spring-cloud-eureka-client有多个呢，那么我们如何处理呢，这里spring-cloud为我们实现了负载均衡(spring-cloud-eureka-consumer-ribbon)，下篇介绍

参考资料

1. https://github.com/changdaye/spring-cloud-study/tree/master/spring-cloud-eureka-consumer

2. https://www.jianshu.com/p/4fd7c2bac05b

3. https://springcloud.cc/spring-cloud-dalston.html#spring-cloud-ribbon

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