从基础数据库，无法获取连接，无法连接到数据库。

严重: StandardWrapper.Throwable

org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!

at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionM