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ApplicationContext ac = new FileSystemXmlApplicationContext("applicationContext.xml");
ac.getBean("beanId");
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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");
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