The server time zone value is unrecognized or repr

异常信息：

The server time zone value 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.

异常原因：

MySQL 5.6 的版本新特性。

解决方法：

connectionURL后面需要加上 &serverTimezone=GMT%2B8