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EnableAutoConfiguration@Target(ElementType.TYPE)@Retention(RetentionPolicy.RUNTIME)@Documented@Inherited@AutoConfigurationPackage@Import(AutoConfigurationImportSelector.class)public @interface EnableAutoConfiguration {...省略}AutoConfigurationImpo

运用1：替换if-else 或switch-case自定义注解类运用ApplicationContextAwareApplicationContext : Spring容器上下文1.自定义注解@Target(ElementType.TYPE)@Retention(RetentionPolicy.RUNTIME)@Documented@Inheritedpublic @interface PayWayAnnotation { /** * @return 支付方式