java.sql.SQLException: The server time zone value ‘???ú±ê×??±??’ 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.
解决办法：
你原先的JDBCURL：jdbc:mysql://localhost:3306/mydatabase
在此基础上添加：?serverTimezone=UTC也就是：jdbc:mysql://localhost:3306/mydatabase?serverTimezone=UTC
但如果你的JDBCURL类似下面：
jdbc:mysql://localhost:3306/mydatabase?serverTimezone=UTC&characterEncoding=utf-8
就是有多个params的时候需要以&分开，但&要改为& 如下：
jdbc:mysql://localhost:3306/mydatabase?serverTimezone=UTC&characterEncoding=utf-8
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