问题：Connection failed. Verify all connection parameters and confirm that the appropriate driver is installed.
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.

解决：设定mysql数据库时区即可或者在kettle数据库连接的选项中配置serverTimezone参数，我使用的是后者。

show variables like '% time_zone%';

set global time_zone = '+8:00';

kettle中设置serverTimezone参数