Spring AOP 作为面向切面编程的实现,是 Spring 框架中仅次于 IoC 的核心功能。它通过动态代理机制实现代码的横切复用,在事务管理、日志记录、权限控制等场景中应用广泛。理解 AOP 的底层实现,尤其是动态代理的选择逻辑和切面织入流程,是面试中的重要加分项。本文结合源码与面试场景,解析核心原理与实战要点。一、AOP
920. Number of Music PlaylistsYour music player contains n different songs. You want to listen to goal songs (not necessarily different) during your trip. To avoid boredom, you will create a playlist