public class HomeController { @RequestMapping("/") public String showPage() { return "main-menu"; } } 这是我的 Web.xml 文件: <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi...