报错：

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

解决：

在

url: jdbc:mysql://localhost:3306/test

后面添加：

?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC

url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC

OK

springboot启动过程中出现You must configure either the server or JDBC driver (via the serverTimezone configuration