org.springframework.beans.factory.BeanDefinitionStoreException: Unexpected exception parsing XML document from class path resource [applicationContext.xml]; nested exception is java.lang.NoClassDefFoundError:
org/springframework/aop/TargetSource
由于导包不齐而引起的报错：
报错信息其实很明显：java.lang.NoClassDefFoundError: org/springframework/aop/TargetSource,少导入了一个aop.jar包，先找到自己下载过的spring framework:
导入aop.jar即可
