方法二、
在idea中进行连接，database的Event log（idea右下角）
Caused by: java.sql.SQLException: 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.
所以有两个方法：
1、修改IDEA的database的配置
2、修改URL
问题补充：
MySQL8.0的连接池是com.mysql.cj.jdbc.Driver，之前5.7版本是com.mysql.jdbc.Driver
IDEA连接MySQL错误
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