/**

 * Indicates one or more {@link Configuration @Configuration} classes to import.

 * 表示import 一个或多个class

 * <p>Provides functionality equivalent to the {@code <import/>} element in Spring XML.
 * 等同于Spring XML 中的 <import/>的作用

 * Allows for importing {@code @Configuration} classes, {@link ImportSelector} and

 * {@link ImportBeanDefinitionRegistrar} implementations, as well as regular component

 * classes (as of 4.2; analogous to {@link AnnotationConfigApplicationContext#register}).

 * 运行的值类型 @Configuration注解的类,@ImportSelector 和 ImportBeanDefinitionRegistrar的实现类
 *

 * <p>{@code @Bean} definitions declared in imported {@code @Configuration} classes should be

 * accessed by using {@link org.springframework.beans.factory.annotation.Autowired @Autowired}

 * injection. Either the bean itself can be autowired, or the configuration class instance

 * declaring the bean can be autowired. The latter approach allows for explicit, IDE-friendly

 * navigation between {@code @Configuration} class methods.

 * @Bean声明定义的 @Configuration实现类 通过@Autowired注入的方式访问; 不管是通过autowired 实例化还是通过
 * 配置配置类 实例化声明bean. 后一种方法显示通过IDEA友好在各个方法之间导航

 * <p>May be declared at the class level or as a meta-annotation.

 * 可以在类级别声明，也可以作为元注释

 * <p>If XML or other non-{@code @Configuration} bean definition resources need to be

 * imported, use the {@link ImportResource @ImportResource} annotation instead.

 *

 * @author Chris Beams

 * @author Juergen Hoeller

 * @since 3.0

 * @see Configuration

 * @see ImportSelector

 * @see ImportResource

 */

@Target(ElementType.TYPE)

@Retention(RetentionPolicy.RUNTIME)

@Documented

public @interface Import {

    /**

     * {@link Configuration}, {@link ImportSelector}, {@link ImportBeanDefinitionRegistrar}

     * or regular component classes to import.

     */

    Class<?>[] value();

}