public class LoginInterceptor implements HandlerInterceptor {    private static final Logger log = LoggerFactory.getLogger(LoginInterceptor.class);    /**     * 进入controller层之前拦截请求     *     * @param httpServletRequest     * @param httpServletResponse     * @param o     * @return     * @throws Exception     */    @Override    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {　　　　　　log。info("---------------开始进入地址拦截器-------------------")return true;    }    //访问controller之后 访问视图之前被调用    @Override    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {        log.info("--------------处理请求完成后视图渲染之前的处理操作---------------");    }    //访问视图之后被调用    @Override    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {        log.info("---------------视图渲染之后的操作-------------------------0");    }}

 

/*拦截器配置类 */@Configurationpublic class WebAppConfig extends WebMvcConfigurerAdapter {    // 多个拦截器组成一个拦截器链    // addPathPatterns 用于添加拦截规则    // excludePathPatterns 用户排除拦截    @Override    public void addInterceptors(InterceptorRegistry registry) {        registry.addInterceptor(new LoginInterceptor())//添加拦截器                .addPathPatterns("/**") //拦截所有请求                .excludePathPatterns("/UserCon/**", "/Doctor/**", "/SMS/**");//对应的不拦截的请求    }}