public class TokenInterceptor implements HandlerInterceptor {

    @Override

    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        //若不是映射方法，直接通过

        if (!(handler instanceof HandlerMethod)){

            return true;

        }

        HandlerMethod handlerMethod = (HandlerMethod)handler;

        Method method = handlerMethod.getMethod();

        if (method.isAnnotationPresent(PassToken.class)){

            return true;

        }

        if (method.isAnnotationPresent(RequireToken.class)){

            String token = null;

            //String token = request.getHeader("token");

            Cookie[] cookies = request.getCookies();

            for (Cookie cookie : cookies) {

                if ("token".equals(cookie.getName())){

                    token = cookie.getValue();

                    break;

                }

            }

            if (token == null){

                throw new RuntimeException("无token信息，请重新登录");

            }

            String username = JwtUtils.getUsernameFromToken(token);

            if (username == null){

                throw new RuntimeException("token信息错误");

            }

            request.setAttribute("username", username + ",test");

            return true;

        }

        return false;

    }

    @Override

    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override

    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }

}

@Configuration

public class InterceptorConfig implements WebMvcConfigurer {

    @Override

    public void addInterceptors(InterceptorRegistry registry) {

        registry.addInterceptor(tokenInterceptor())

            .addPathPatterns("/**");

    }

    @Bean

    public TokenInterceptor tokenInterceptor(){

        return new TokenInterceptor();

    }

}