SpringBoot java.lang.ClassCastException:ResourceHttpRequestHandler cannot be cast to HandlerMethod

Springboot 在配置个性化的webMVC时，静态资源的请求也被拦截的时候，会出现以上错误，所以需要忽略对静态资源的拦截

1） @Configuration
public class MyMvcConfig implements WebMvcConfigurer {

    // 拦截所有请求
    @Override
    public void addInterceptors(InterceptorRegistry registry){
        registry.addInterceptor(new AuthenticationInterceptor()).addPathPatterns("/**")
                .excludePathPatterns("/index.html","/","/user/login","/css/*","/js/*","/images/*","/swagger-ui.html","/**/*.html","/**/*.css","/**/*.js");
    }
}

以上代码，

excludePathPatterns  "/**/*.html","/**/*.css","/**/*.js"部分就是忽略静态资源请求的配置

2） 并在HandlerInterceptor的实现类里面判断如果时静态资源类的请求的话，直接放过通行

public class AuthenticationInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
       String token = request.getHeader("token");
       if((handler instanceof HandlerMethod)){// 如果不是method，直接放行
           return true;
       }
       if(handler instanceof ResourceHttpRequestHandler){
           return true;
       }
}

SpringBoot java.lang.ClassCastException:ResourceHttpRequestHandler cannot be cast to HandlerMethod

原文：https://www.cnblogs.com/learning520/p/15081166.html