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@Componentpublic class WendaWebConfiguration extends WebMvcConfigurerAdapter {    @Autowired    LoginFilter loginFilter;    @Override    public void addInterceptors(InterceptorRegistry registry) {        registry.addInterceptor(loginFilter);        super.addInterceptors(registry);    }}上面的必须要写  不写就报错  类似 注册的样子#############################################################################@Componentpublic class LoginFilter extends HandlerInterceptorAdapter {    @Override    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {        System.out.println("我是拦截器");        return true;    }}

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