解决将mysql5.7的maven改为mysql8.0

之前尝试了很多种，学习了这篇成功调试出来了。

jdbc.properties:

jdbc.driver = com.mysql.cj.jdbc.Driver
jdbc.url = jdbc:mysql://localhost:3306/数据库的名字?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone = GMT
jdbc.username = root
jdbc.password = 你的密码

pom.xml

    <!--Mysql数据库驱动-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.22</version>
    </dependency>