Referenced file contains errors (http://www.springframework.org/...解决

 今天打开老项目出现以下错误：

Referenced file contains errors (http://www.springframework.org/schema/context/spring-context-4.2.xsd). For more information, right click on the message in the Problems View and select "Show Details..." 

解决：

而后右键项目，选择Validate，便可解决