It is just my opinion, so don't you attack me. please! But if this posting has some incorrect informations, you comment about that Please!! Why need Annotation in Java? Annotation이란? · 사전적인 의미로 주석을 뜻하지만

1、引入依赖 spring-boot-starter-aop 2、添加自定义注解 import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target;