eclipse出现服务器错误500有一天严重的这怎么解决啊，求大佬帮助，错误如下

严重: Servlet.service() for servlet [DispatcherServlet] in context with path [/HotelSSM] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:

Servlet.service() for servlet [DispatcherServlet] in context with path [/HotelSSM] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:
错误一模一样，我本来买的时候那个人给我配置好了也确定能用，不知道为啥又这样了