解决springjava.lang.IllegalStateException: BeanFactory not initialized or already closed - call 'refresh'异常

错误写法：

			cxt = new ClassPathXmlApplicationContext();
			productService = (ProductService)cxt.getBean("productTypeServiceBean");
		

 正确写法：

	　　　　　　　　　 cxt = new ClassPathXmlApplicationContext("beans.xml");
			productService = (ProductService)cxt.getBean("productTypeServiceBean");