Spring：动态刷新JavaWeb应用ApplicationContext配置

@RequestMapping(value="refresh")
    @ResponseBody
  public void refresh(HttpServletRequest request){
      /*XmlWebApplicationContext context1 = (XmlWebApplicationContext)WebApplicationContextUtils.getWebApplicationContext((request.getSession().getServletContext()));
        context1.refresh();*/
        /**
         * Interface to provide configuration for a web application. This is read-only while
         * the application is running, but may be reloaded if the implementation supports this.
         *
         * 用于为Web应用程序提供配置的接口。在应用程序运行时，这是只读的，但如果实现支持此操作，则可以重新加载应用程序。
         */
        WebApplicationContext context = WebApplicationContextUtils .getWebApplicationContext(request.getSession().getServletContext());
        /**
         * Central interface to provide configuration for an application.
         * This is read-only while the application is running, but may be
         * reloaded if the implementation supports this.
         *
         * 为应用程序提供配置的中央接口。在应用程序运行时，这是只读的，但如果实现支持此操作，则可能被重新加载。
         *
         */
        ApplicationContext parent = context.getParent();
        if (parent !=null) {
            ((AbstractRefreshableApplicationContext) parent) .refresh();
        }
        ((AbstractRefreshableApplicationContext) context).refresh();
  }