我正在嘗試以編程方式將Spring Boot應用程序上下文設置為root。上下文根的原因是我們希望從中訪問該應用程序，localhost:port/{app_name}并將所有控制器路徑附加到該應用程序。這是Web應用程序的應用程序配置文件。@Configurationpublic class ApplicationConfiguration {  Logger logger = LoggerFactory.getLogger(ApplicationConfiguration.class);  @Value("${mainstay.web.port:12378}")  private String port;  @Value("${mainstay.web.context:/mainstay}")  private String context;  private Set<ErrorPage> pageHandlers;  @PostConstruct  private void init(){      pageHandlers = new HashSet<ErrorPage>();      pageHandlers.add(new ErrorPage(HttpStatus.NOT_FOUND,"/notfound.html"));      pageHandlers.add(new ErrorPage(HttpStatus.FORBIDDEN,"/forbidden.html"));  }  @Bean  public EmbeddedServletContainerFactory servletContainer(){      TomcatEmbeddedServletContainerFactory factory = new TomcatEmbeddedServletContainerFactory();      logger.info("Setting custom configuration for Mainstay:");      logger.info("Setting port to {}",port);      logger.info("Setting context to {}",context);      factory.setPort(Integer.valueOf(port));      factory.setContextPath(context);      factory.setErrorPages(pageHandlers);      return factory;  }  public String getPort() {      return port;  }  public void setPort(String port) {      this.port = port;  }}這是主頁的索引控制器。@Controllerpublic class IndexController {  Logger logger = LoggerFactory.getLogger(IndexController.class);  @RequestMapping("/")  public String index(Model model){      logger.info("Setting index page title to Mainstay - Web");      model.addAttribute("title","Mainstay - Web");      return "index";  }}應用程序的新根目錄應位于localhost:12378/mainstay，但仍位于localhost:12378。我錯過了什么導致Spring Boot在請求映射之前不附加上下文根的問題？