连接mysql报错：

Caused by: com.mysql.cj.exceptions.InvalidConnectionAttributeException: The server time zone value '?й???????' 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.

如图：

 解决方案，在连接mysql的jdbc的url拼上&serverTimezone=UTC，比如：

jdbc:mysql://127.0.0.1:3306/你的数据库名称?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&serverTimezone=UTC