@H_502_2@

@Import({SnsConfiguration.class,SnsWebConfiguration.class})
public @interface EnableSns

@Import does the following：@H_502_2@

@H_502_2@

@interface Import:
Indicates one or more @Configuration classes to import.@H_502_2@

简而言之：这些注释只将多个@Configuration类组合成一个单独的注释.@H_502_2@

例如. @EnableSns与添加@SnsConfiguration和@SnsWebConfiguration相同,后者为您提供AmazonSNS,RegionProvider和AWSCredentialsProvider bean.@H_502_2@