<!--dubbo-->
        <dependency>
            <groupId>com.alibaba.spring.boot</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.0.0</version>
        </dependency>

接口

public interface IUseService {
    public String sayHello(String name);
}

实现类

@Component
@Service(interfaceClass = IUseService.class)  //dubbo注解
public class UserServiceImpl implements IUseService {
    @Override
    public String sayHello(String name) {
        return "hello:"+name;
    }
}