Mysql 8.0 连接不上

错误：

Connection to @localhost failed.
[08001] Could not create connection to database server. Attempted reconnect 3 times. Giving up.
 

解决：

1. jdbc不要选错

 com.mysql.cj.jdbc.Driver

2.后面加serverTimezone=UTC

jdbc:mysql://localhost:3306?serverTimezone=UTC