一、简介
类似于servlet开发中的过滤器Filter,用于处理器进行预处理和后处理。
二、常用场景
权限检测、日志记录、性能监控
三、方法
boolean preHandle(HttpServletRequest request,HttpServletResponse response,Object handle )throws exception;
void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView
) throws Exception;
void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex
) throws Excepion;