文件结构 

代码部分

1、新建provider-server导入pom依赖

<dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.3</version>
        </dependency>

        <dependency>
            <groupId>com.github.sgroschupf</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.1</version>
        </dependency>

        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>2.12.0</version>
        </dependency>

        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>2.12.0</version>
        </dependency>

        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.14</version>
            <!--            排除slf4j-->
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </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>

2、TicketService

package com.guo.service;

public interface TicketService {

    public  String getTicket();
}

3、TicketServiceImpl

package com.guo.service;

import org.apache.dubbo.config.annotation.Service;
import org.springframework.stereotype.Component;

//服务注册与发现

@Service  //可以被扫描，启动后自动注册到注册中心
@Component
public class TicketServiceImpl implements TicketService{
    @Override
    public String getTicket() {
        return "郭俊";
    }
}

4、application.properties

server.port=8001


dubbo.application.name=provider-server

dubbo.registry.address=zookeeper://127.0.0.1:2181

dubbo.scan.base-packages=com.guo.service

 5、新建consumer-server导入pom依赖

<dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.3</version>
        </dependency>

        <dependency>
            <groupId>com.github.sgroschupf</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.1</version>
        </dependency>

        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>2.12.0</version>
        </dependency>

        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>2.12.0</version>
        </dependency>

        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.14</version>
            <!--            排除slf4j-->
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </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>

6、TicketService

package com.guo.service;

public interface TicketService {

    public  String getTicket();
}

7、UserService

 8、application.properties

server.port=8002

dubbo.application.name=consumer-server

dubbo.registry.address=zookeeper://127.0.0.1:2181

 测试部分

1、启动zookeeper服务

 2、启动provider，连接成功

 3、编写测试类

@SpringBootTest
class ConsumerServerApplicationTests {

    @Autowired
    UserService userService;

    @Test
    void contextLoads() {
        userService.buyTicket();
    }

}

测试结果 

 成功在注册中心拿到，测试成功