<dubbo:application name="service-provider" version="1.0"/> <dubbo:registry address="zookeeper://127.0.0.1:2181"/> <dubbo:protocol name="dubbo" port="20880"/> <dubbo:service interface="com.example.service.UserService" ref="userService" version="1.0"/> <dubbo:registry id="zookeeperRegistry" address="zookeeper://127.0.0.1:2181" timeout="10000"/> <dubbo:application name="service-consumer" version="1.0"/> <dubbo:registry address="zookeeper://127.0.0.1:2181"/> <dubbo:reference id="userService" interface="com.example.service.UserService" version="1.0"/> @Service public class UserServiceImpl implements UserService { @Reference private OrderService orderService; public void getUserOrders(int userId) { List<Order> orders = orderService.getOrdersByUserId(userId); } }