spring web interceptor interceptor

1. Introduction

    Similar to the filter in servlet development, it is used for preprocessing and postprocessing by the processor.

2. Common scenarios

    Permission detection, logging, performance monitoring

3. Methods

    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;