public class Interceptor implements HandlerInterceptor{private Logger logger = LoggerFactory.getLogger(Interceptor.class);public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)throws Exception {// TODO Auto-generated method stub
}public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)throws Exception {// TODO Auto-generated method stub
}public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object arg2) throws Exception {String flag = null;flag = request.getParameter("auth");if(StringUtils.isEmpty(flag) || !flag.equals("php")){/*logger.error("error-auth:{}", flag);response.getWriter().append("error-auth");return false;*/} else {logger.info("通过校验！");return true;}return true;}
}

/** 如果是一个过滤器,在MyFilter类上加上@WebFilter(filterName = "myFilter",urlPatterns = {"/*"}) ,入口类加上@ServletComponentScan即可*/
public class MyFilter implements Filter{@Overridepublic void init(FilterConfig filterConfig) throws ServletException {}@Overridepublic void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {System.out.println(request.getParameter("name"));HttpServletRequest hrequest = (HttpServletRequest)request;HttpServletResponseWrapper wrapper = new HttpServletResponseWrapper((HttpServletResponse) response);if(hrequest.getRequestURI().indexOf("/index") != -1 ||hrequest.getRequestURI().indexOf("/asd") != -1 ||hrequest.getRequestURI().indexOf("/online") != -1 ||hrequest.getRequestURI().indexOf("/login") != -1) {chain.doFilter(request, response);}else {
//            wrapper.sendRedirect("/login");
            chain.doFilter(request, response);}}@Overridepublic void destroy() {}
}

/*** @date: 2019/4/1* @description:  ServletRequestListener、 HttpSessionListener 、ServletContextListener ......* 可直接在MyListener类上使用@WebListener注解,入口类加上@ServletComponentScan即可*/
public class MyListener implements HttpSessionListener {private Logger logger = LoggerFactory.getLogger(this.getClass());//用户this.getClass(), 粘贴不容易出错public static int online = 0;@Overridepublic void sessionCreated(HttpSessionEvent se) {online ++;logger.info("online在线人数为：" + online);}@Overridepublic void sessionDestroyed(HttpSessionEvent se) {}
}

@Configuration
public class MyWebAppConfigurer implements WebMvcConfigurer {//    @Bean/* public HandlerInterceptor getMyInterceptor(){return new Interceptor();}*//*** 注册拦截器* @param registry*/@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(new Interceptor()).addPathPatterns("/**");
//        super.addInterceptors(registry);
    }/*** 注册监听器* @return*/@SuppressWarnings({ "rawtypes", "unchecked" })@Beanpublic ServletListenerRegistrationBean listenerRegist() {ServletListenerRegistrationBean srb = new ServletListenerRegistrationBean();srb.setListener(new MyListener());System.out.println("listener");return srb;}/*** 注册过滤器* @return*/@SuppressWarnings({ "rawtypes", "unchecked" })@Beanpublic FilterRegistrationBean filterRegist() {FilterRegistrationBean frBean = new FilterRegistrationBean();frBean.setFilter(new MyFilter());
//        frBean.setOrder(1);//多个过滤器时指定过滤器的执行顺序frBean.addUrlPatterns("/*");System.out.println("filter");return frBean;}/*@Overridepublic void addViewControllers(ViewControllerRegistry registry) {registry.addViewController("/zxc/foo").setViewName("foo");}*/}