Referenced file contains errors (http://mybatis.org/dtd/mybatis-3-config.dtd).

Referenced file contains errors (http://mybatis.org/dtd/mybatis-3-config.dtd). For more
 information, right click on the message in the Problems View and select "Show Details..."

对于Eclipse编译器来说，会有个缓存，这样验证的时候他会告诉你版本不统一

Preferences -> General -> Network Connections -> Cache --- Remove 删除里面的缓存回复