idea内报错信息：java.sql.SQLException: connect error, url jdbc:mysql:/localhost:3306/db-mcms-open?characterEncoding=UTF-8, driverClass com.mysql.jdbc.Driver
at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1582) ~[druid-1.1.9.jar:1.1.9]
at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2466) [druid-1.1.9.jar:1.1.9]