public class UserService { @Inject private UserDao userDao; // ... } <bean id="userDao" class="com.example.UserDaoImpl" /> public class OrderService { private OrderDao orderDao; @Inject public OrderService(OrderDao orderDao) { this.orderDao = orderDao; } // ... } <bean id="orderService" class="com.example.OrderService"> <constructor-arg ref="orderDao" /> </bean> @Singleton public class MyService { // ... } <bean id="myService" class="com.example.MyService" scope="singleton" /> @Retention(RetentionPolicy.RUNTIME) @Target(ElementType.TYPE) public @interface Repository { // ... } @Repository public class UserDaoImpl implements UserDao { // ... } <include-annotation name="com.example.Repository" />