方法一：在初始化時儲存ApplicationContext物件　　ApplicationContext ac = new FileSystemXmlApplicationContext("applicationContext.xml");ac.getBean("beanId");　　這種方式適用於採用Spring框架的獨立應用程式，需要程式透過配置檔案手工初始化Spring的情況。　　方法二：透過Spring提供的工具類獲取ApplicationContext物件　　import org.springframework.web.context.support.WebApplicationContextUtils;ApplicationContext ac1 = WebApplicationContextUtils.getRequiredWebApplicationContext(ServletContext sc);ApplicationContext ac2 = WebApplicationContextUtils.getWebApplicationContext(ServletContext sc);ac1.getBean("beanId");ac2.getBean("beanId");