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grep "password" /var/log/mysqld.log 【执行后，发现 localhost 后面是密码】 mysql> set global validate_password_policy=LOW; mysql> set global validate_password_length=9; mysql> ALTER USER USER() IDENTIFIED BY 'wangzi2124'; mysql> grant all privileges on *.* .

1、执行sql select version() from dual; 2、-- 查看 mysql版本号 = 8.0.19 3、替换 pom.xml mysql 驱动 <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.