Spring Cloud 入门 -- 搭建Eureka注册中心 实现服务者与消费者的服务调用

以下是使用Spring Cloud搭建Eureka注册中心，并实现服务提供者和消费者的简化示例代码：

Eureka Server 注册中心:

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

application.yml:

server:
  port: 8761
 
eureka:
  instance:
    hostname: localhost
  client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

服务提供者:

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

application.yml:

spring:
  application:
    name: provider-service
server:
  port: 8080
 
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

服务消费者:

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

application.yml:

spring:
  application:
    name: consumer-service
server:
  port: 8081
 
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

在这个例子中，我们创建了一个Eureka Server和一个服务提供者与一个服务消费者。服务提供者注册到Eureka Server并定期心跳，消费者通过Eureka Server获取服务列表，并通过Spring Cloud的负载均衡器进行调用。这个简化的例子展示了服务注册与发现的基本流程。