Spring 泛型依赖注入

// src/beans.xml
<beans>
    <context:component-scan base-package="com.lijunyang" />
</beans>

// src/com/lijunyang/model/BaseService.java
public class BaseService<T> {
    @Autowired
    protected BaseRepository<T> repository;
    public void add() {
        System.out.println("add...");
        System.out.println("repository");
    }
}
// src/com/lijunyang/model/BaseRepository.java
public class BaseRepository {
}
// src/com/lijunyang/model/User.java
public class User {
}
// src/com/lijunyang/model/UserService.java
@Service
public class UserService extends BaseService<User> {
}
// src/com/lijunyang/model/UserRepository.java
@Repository
public class UserRepository extends BaseRepository<User> {
}
// src/com/lijunyang/test/Main.java
public class Main {
    public static main(String args[]) {
        ApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml");
        UserService userService = (UserService) ctx.getBean("userService");
        userService.add();
    }
}