[SpringMVC-Interceptor]

public class MyHandlerInterceptor extends HandlerInterceptorAdapter {
    /*
     * 进入请求前调用
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
            Object handler) throws Exception {
        System.out.println("-----preHandle");
        return super.preHandle(request, response, handler);
    }
    /*
     * 请求处理完毕后调用
     */
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response,
            Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("-----postHandle");
        super.postHandle(request, response, handler, modelAndView);
    }
    /*
     * 全部处理完毕后调用
     */
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response,
            Object handler, Exception ex) throws Exception {
        System.out.println("-----afterCompletion");
        super.afterCompletion(request, response, handler, ex);
    }
}

log结果：
-----preHandle
-----postHandle
-----afterCompletion