http500错误 http 500内部服务器错误，请与管理员联系。 请尝试以下操作： ·打开主页，然后查找指向您感兴趣信息的链接。 ·单击后退链接，尝试其他链接。

错误：javax.servlet.ServletException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Cannot open connection
错误码：500
信息：
异常：null
exception:javax.servlet.ServletException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Cannot open connection
cause:null
message:Could not open Hibernate Session for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Cannot open connection
localizedMessage:Could not open Hibernate Session for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Cannot open connection
stackTrace:[Ljava.lang.StackTraceElement;@1914ff2