一、现象

java.sql.SQLException: The server time zone value 'Öйú±ê׼ʱ¼ä' 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.
很显然，系统时区读取时出现了错误。

二、解决

方法1

可以在mysql中执行命令： 
set global time_zone='+8:00' 

方法2

在数据库驱动的url后加上serverTimezone=UTC参数

jdbcUrl=jdbc:mysql://localhost:3306/omc?characterEncoding=utf8&serverTimezone=UTC