How to gracefully kill web.xml and initialize the annotation-based spring container when starting tomcat

public class WebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
    
    

    protected Class<?>[] getRootConfigClasses() {
    
    
        return new Class<?>[] {
    
    ApplicationConfig.class};
    }

    protected Class<?>[] getServletConfigClasses() {
    
    
        return new Class<?>[] {
    
    SpringMvcConfig.class};
    }

    //将DispatcherServlet映射到“/”，即该DispatcherServlet会处理所有的请求
    protected String[] getServletMappings() {
    
    
        return new String[]{
    
    "/"};
    }

}