Spring核心IoC容器的依赖注入接口和层级包命名规范

public interface FilmDao {
    void selectAll();
}

@Repository("filmDao")
public class FilmDaoImpl implements FilmDao {
    @Override
    public void selectAll() {
         System.out.println("dao-film");
    }
}

//JavaBean
public class Film {
    private String fname ;
    private Double fprice ;
 //注：构造和set/get方法省略
}

public interface FilmService {
    void selectAll();
}

@Service("filmService")
public class FilmServiceImpl implements FilmService {
​
    //依赖注入
    @Resource(name="filmDao")
    private FilmDao film;
    @Override
    public void selectAll() {
        film.selectAll();
        System.out.println("service-film");
    }
}

public interface FilmController {
    void selectAll();
}

@Controller("filmController")
public class FilmControllerImpl implements FilmController {
​
    //依赖注入
    @Resource(name="filmService")
    private FilmService filmService;
​
    @Override
    public void selectAll() {
        filmService.selectAll();
        System.out.println("controller-film");
    }
}

@Configuration  //声明配置类
@ComponentScan(basePackages = "com.czxy")  //加载所需要的包
public class FilmConfiguration {
}

@RunWith(SpringRunner.class) //Spring整合Junit
@ContextConfiguration(classes = FilmConfiguration.class)  //加载配置类
​
public class TestFilm {
​
    //依赖注入
    @Resource(name="filmController")
    private FilmController filmServlet;
​
    @Test
    public void test(){
        filmServlet.selectAll();
    }
}