@Import定义
Indicates one or more @Configuration classes to import.
表示一个或多个类会被导入，参考@Configuration.
Provides functionality equivalent to the
提供在xml中
Allows for importing @Configuration classes, ImportSelector and ImportBeanDefinitionRegistrar implementations,as well as regular component classes (as of 4.2; analogous to AnnotationConfigApplicationContext#register).
允许导入@Configuration类，ImportSelector和ImportBeanDefinitionRegistrar的实现类,等同于正常的组件类(4.2开始;类似于AnnotationConfigApplicationContext.register).
不过我从spring文档中看到AnnotationConfigRegistry接口是从4.1版本开始的
@Bean definitions declared in imported @Configuration classes should be accessed by using 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 @Configuration class methods.
在导入类里定义的Bean应该可以被Autowired注入访问。bean自身或者定义bean的配置类都能被autowired。后者能在类方法之间被显式的导航. 这个我们在之后使用示例中会展示。
May be declared at the class level or as a meta-annotation.
在class层级定义或者当做一个meta-annotation。
If XML or other non-@Configuration bean definition resources need to be imported, use the @ImportResource annotation instead.
如果xml或者其他没有@Configuration的bean资源需要被导入，那就使用@ImportResource注解来替代。
参考资料：
