D:\Program Files (x86)\MySQL\MySQL Server 5.7\bin>mysqld.exe --defaults-file="d:
\ProgramData\MySQL\MySQL Server 5.7\my.ini" --skip-grant-tables
D:\Program Files (x86)\MySQL\MySQL Server 5.7\bin>mysql -uroot -p
Enter password: 直接輸入回車
mysql> use mysql;
mysql> update mysql.user set authentication_string=password("123456"),password_last_changed = NOW() where user="root";
mysql> ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVER;
mysql> exit
刪除mysqld進程,重啓mysql服務