高版本改法 <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.20</version> </dependency>
把com.mysql.jdbc.Driver改成com.mysql.cj.jdbc.Driver
把jdbc:mysql://localhost:3306/smbms?useSSL=true&useUnicode=true&characterEncoding=UTF-8改成jdbc:mysql://localhost:3306/test?useSSL=true&useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
使用com.mysql.cj.jdbc.Driver需要指定时区serverTimezone