1.新建個

#介面
package org.example;

public interface LiaoYangService {
    public void say();
}
   


#實現類
package org.example;

public class LiaoYangServiceImpl implements LiaoYangService
{
    @Override
    public void say() {
        System.out.println("liao yang say hi to you");
    }
}


#啟動類
package
 
 org.example;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.io.IOException;

/**
 * Hello world!
 *
 */
public class App 
{
    public static void main( String[] args ) throws IOException {
        System.out.println( "Hello World!" );
        ClassPathXmlApplicationContext classPathXmlApplicationContext 
 
=
                new ClassPathXmlApplicationContext("META-INF/spring/application.xml");
        classPathXmlApplicationContext.start();

        System.in.read();
    }
}

#pom檔案

<?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>

  <groupId>org.example</groupId>
  <artifactId>Dubbo</artifactId>
  <version>1.0-SNAPSHOT</version>

  <name>Dubbo</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
      <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>dubbo</artifactId>
        <version>2.6.8</version>
      </dependency>
    <dependency>
      <groupId>io.netty</groupId>
      <artifactId>netty-all</artifactId>
      <version>4.1.32.Final</version>
    </dependency>
    <dependency>
      <groupId>org.apache.curator</groupId>
      <artifactId>curator-framework</artifactId>
      <version>4.0.0</version>
    </dependency>
    <dependency>
      <groupId>org.apache.curator</groupId>
      <artifactId>curator-recipes</artifactId>
      <version>4.0.0</version>
    </dependency>

    <dependency>
      <groupId>org.apache.zookeeper</groupId>
      <artifactId>zookeeper</artifactId>
      <version>3.4.7</version>
    </dependency>

  </dependencies>

  <build>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-jar-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
        <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
        <plugin>
          <artifactId>maven-site-plugin</artifactId>
          <version>3.7.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-project-info-reports-plugin</artifactId>
          <version>3.0.0</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

檢視zk，發現已經實現註冊

[zk: localhost:2181(CONNECTED) 15] ls /
[dubbo, zookeeper]
[zk: localhost:2181(CONNECTED) 16] ls /dubbo
[org.example.LiaoYangService]
[zk: localhost:2181(CONNECTED) 17] ls /dubbo/org.example.LiaoYangService/

configurators   providers
[zk: localhost:2181(CONNECTED) 17] ls /dubbo/org.example.LiaoYangService/providers/dubbo%3A%2F%2F192.168.137.1%3A20880%2Forg.example.LiaoYangService%3Fanyhost%3Dtrue%26application%3Dlyy_Service%26bean.name%3Dorg.example.LiaoYangService%26dubbo%3D2.0.2%26generic%3Dfalse%26interface%3Dorg.example.LiaoYangService%26methods%3Dsay%26pid%3D31880%26side%3Dprovider%26timestamp%3D1594816581871