springboot的拦截器Interceptor的性质

• Interceptor在springboot2.x版本的快速入门

1. 实现HandlerInterceptor的接口，并重载它的三个方法：preHandle、postHandle、afterCompletion。

2.  1 1 /**
    2  2  * 登陆拦截器
    3  3  * @author HILL
    4  4  *
    5  5  */
    6  6 public class LoginInterceptor implements HandlerInterceptor {
    7  7 
    8  8     @Override
    9  9     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
   10 10             throws Exception {
   11 11         return HandlerInterceptor.super.preHandle(request, response, handler);
   12 12     }
   13 13 
   14 14     @Override
   15 15     public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
   16 16             ModelAndView modelAndView) throws Exception {
   17 17         HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
   18 18     }
   19 19 
   20 20     @Override
   21 21     public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
   22 22             throws Exception {
   23 23         HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
   24 24     }
   25 25 }

   实现接口