This application has no explicit mapping for /error, so you are seeing this as a fallback.

绝对有用！
静态资源找不到映射，爆404的错误
解决办法：

编写配置类，映射静态资源url

@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {
    /**
     * 设置静态资源映射
     * @param registry
     */
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开始进行资源的映射...............");
        //这里的page是resource文件夹下的文件夹，page文件夹下面是html文件等，url访问路径是：localhost:/page/xxx.html，因此这里要映射一下
        registry.addResourceHandler("/page/**").addResourceLocations("classpath:/page/");
    }
}