前言

本文介绍如何通过Nacos作为配置中心，实现Dubbo服务的注册与消费

以HelloService服务为例

public interface HelloService {
    String sayHello(String name);
}
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服务提供方和消费方都引入以下jar

    
    
        org.springframework.boot
        spring-boot-starter
    

    
        org.apache.dubbo
        dubbo-spring-boot-starter
    

    
    
        org.apache.dubbo
        dubbo
    

    
    
        org.apache.dubbo
        dubbo-registry-nacos
    

    
        com.alibaba.nacos
        nacos-client
    

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需要搭建一个Nacos服务，这里直接使用程序员DD提供的公益性的Nacos服务，
详细地址

服务提供方

1. 实现接口

   @Service(version = “${dubbo.service.version}”)
   public class HelloServiceImpl implements HelloService {

   @Value("${spring.application.name}")
   private String serviceName;
   
   public String sayHello(String name) {
       return String.format("[%s] : Hello , %s", serviceName, name);
   }
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   }

2. 配置服务

   spring.application.name = nacos-dubbo-provider

   dubbo.scan.base-packages= com.github.ly641921791.dubbo.example.nacos.provider.service

   dubbo.protocol.name = dubbo
   dubbo.protocol.port = -1

   dubbo.registry.address = nacos://127.0.0.1:8848

   dubbo.registry.address = nacos://nacos.didispace.com:80

   dubbo.service.version = 1.0.0

3. 引导程序

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

4. 启动应用

启动后在Nacos控制台发现应用注册成功，服务名为providers:com.github.ly641921791.dubbo.example.common.service.HelloService:1.0.0

服务消费方

1. 配置服务

   spring.application.name = nacos-dubbo-consumer

   dubbo.registry.address = nacos://127.0.0.1:8848

   dubbo.registry.address = nacos://nacos.didispace.com:80

   dubbo.service.version = 1.0.0

2. 引导程序 & 服务消费

   @SpringBootApplication
   public class NacosConsumerApplication {

   @Reference(version = "${dubbo.service.version}")
   private HelloService helloService;
   
   public static void main(String[] args) {
       SpringApplication.run(NacosConsumerApplication.class, args).close();
   }
   
   @Bean
   public ApplicationRunner runner() {
       return new ApplicationRunner() {
           public void run(ApplicationArguments args) throws Exception {
               System.out.println(helloService.sayHello("consumer"));
           }
       };
   }
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   }

3. 启动程序

控制台打印出[nacos-provider] : Hello , consumer，说明消费成功

源码及参考

源码地址（可运行） ：https://github.com/ly641921791/knowledge-examples/tree/master/dubbo-example

• 服务提供模块 ：nacos-dubbo-provider
• 服务消费模块 ：nacos-dubbo-consumer

参考文档（Nacos官网） ：http://dubbo.apache.org/zh-cn/docs/user/references/registry/nacos.html

参考案例（Nacos示例） ：https://github.com/apache/dubbo-spring-boot-project/tree/master/dubbo-spring-boot-samples/dubbo-registry-nacos-samples