BeanFactory not initialized or already closed - call 'refresh' before accessing beans解决办法

log4j:WARN No appenders could be found for logger (org.springframework.core.env.StandardEnvironment).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Exception in thread "main" java.lang.IllegalStateException: BeanFactory not initialized or already closed - call ‘refresh‘ before accessing beans via the ApplicationContext
    at org.springframework.context.support.AbstractRefreshableApplicationContext.getBeanFactory(AbstractRefreshableApplicationContext.java:172)
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1097)
    at com.pb.demo.Test.main(Test.java:12)

BeanFactory没有实例化或者已经关闭了，其实产生错误的原因很简单，在写：

ApplicationContext ctx = new ClassPathXmlApplicationContext();

时，没有指定配置文件，Spring实例化BeanFactory的时候是默认到classPath下面查找名为applicationContext.xml的文件的，但是呢，你又没有指定，所以出现了这个错误。

这就是错误的原因，在括号写上配置文件名就行了。

ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");

这样的话就不会出现这样的错误了。

BeanFactory not initialized or already closed - call 'refresh' before accessing beans解决办法

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