ApplicationContext getContext() { if (appContext == null) { appContext = WebApplicationContextUtils.getRequiredWebApplicationContext(servletContext); }  return appContext;
ApplicationContext getContext(ServletContext servletContext) { return WebApplicationContextUtils.getWebApplicationContext(servletContext);
    ApplicationContext getContext() {        if (appContext == null) {            appContext = WebApplicationContextUtils.getRequiredWebApplicationContext(servletContext);        }        return appContext;    }