docs: public void contextInitialized(ServletContextEvent sce) {
          applicationContext = new XmlWebApplicationContext();
          applicationContext.setServletContext(sce.getServletContext());
          applicationContext.setConfigLocation(configLocation);
          applicationContext.refresh();
          appContext.getComboIocLoader().addLoader(new SpringIocLoader2(applicationContext, getSpringBeanNames().toArray(new String[0])));
          sce.getServletContext().setAttribute("spring." + selfName, applicationContext);
          // 登记所有标注了@AsSpringBean的对象到spring ioc
          Ioc ioc = appContext.getIoc();
          for (String name : ioc.getNamesByAnnotation(AsSpringBean.class)) {
              applicationContext.getBeanFactory().registerSingleton(name, ioc.get(null, name));
          }
      }