1.applicationContext.xml 中beans声明部分 添加xmlns:context="http://www.springframework.org/schema/context"
2.xsi:schemaLocation 后添加
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.1.xsd">
The prefix "context" for element "context:property-placeholder" is not bound.
原文：https://www.cnblogs.com/flyfishing1991/p/14055784.html