idea 连接mysql数据库 [08001] Could not create connection to database server. Attempted reconnect 3 times. Giving up. com.mysql.cj.exceptions.CJException: Unknown database 'xxxx'.

set time_zone = ‘+8:00’   设置一下时区就好了，还有可能是使用驱动不一致，可以考虑切换一下