Could not create connection to database server

Could not create connection to database server，一直连接不上数据库，后面发显示mysql版本太低导致的。

本地是5.1版本，阿里云上的是8.0.升级下驱动，解决

 

      mysql
      mysql-connector-java
      8.0.16

1、Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.

 2、jdbc_url上的时区变为必须配置，否则会启动报错。

Caused by: com.mysql.cj.exceptions.InvalidConnectionAttributeException: The server time zone value '�й���׼ʱ��' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.