MySQL忘记密码了怎么办（完整解决步骤）
环境:
系统Windows 10 MySQL-8.0
操作步骤：
- 停止MySQL服务。 net stop MySql80
- 打开mysql.exe和mysqld.exe所在的文件夹,复制路径地址
- 跳过MySql密码验证登录服务，打开命令窗口cmd，进入mysql安装目录下的bin目录,然后输入如下命令： //8.0版本以下有效 mysqld --skip-grant-tables //mysqld –skip-grant-tables实测在mysql8.0中已失效，使用如下命令 mysqld --console --skip-grant-tables --shared-memory
- 如果正常执行的话就不能输入了，需要重新打开一个cmd命令窗口，输入mysql命令就可以直接登录了，跳过了密码验证过程。
- 如果不正常执行，那么就需要检查一下你的mysql路径下的文件了，是否缺少data和my.ini这两个文件。
- 接下来我们需要先删除自己的mysql服务。 //根据自己的服务改成相应的名字 sc delete MySql80
- 接下来新建my.ini配置文件代码如下： //简易版 [mysql] default-character-set=utf8 [mysqld] default-storage-engine=INNODB basedir=C:/Program Files/MySQL/MySQL Server 8.0 datadir=C:/Program Files/MySQL/MySQL Server 8.0/data //复杂版 # For advice on how to change settings please see # http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html # *** DO NOT EDIT THIS FILE. Its a template which will be copied to the # *** default location during install, and will be replaced if you # *** upgrade to a newer version of MySQL. [client] default-character-set = utf8mb4 [mysql] default-character-set = utf8mb4 [mysqld] character-set-client-handshake = FALSE character-set-server = utf8mb4 collation-server = utf8mb4_bin init_connect=SET NAMES utf8mb4 # Remove leading # and set to the amount of RAM for the most important data # cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%. innodb_buffer_pool_size = 128M # Remove leading # to turn on a very important data integrity option: logging # changes to the binary log between backups. # log_bin # These are commonly set, remove the # and set as required. basedir = C:Program FilesMySQLMySQL Server 8.0 datadir = C:Program FilesMySQLMySQL Server 8.0data port = 3306 # server_id = ..... # Remove leading # to set options mainly useful for reporting servers. # The server defaults are faster for transactions and fast SELECTs. # Adjust sizes as needed, experiment to find the optimal values. join_buffer_size = 128M sort_buffer_size = 16M read_rnd_buffer_size = 16M sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES 其中basedir和databir记得改成自己mysql安装目录的路径。
- 接着打开cmd窗口，在mysql的bin目录下执行如下语句： mysqld --initialize-insecure --user=mysql 会自动生成data文件夹。接着再输入如下命令： //后面的路径改成自己的ini文件的路径，这个操作是安装MySql服务，同时设置绑定my.ini配置文件 mysqld --install "MySql80" --defaults-file="C:Program FilesMySQLMySQL Server 8.0my.ini" 最后打开MySql服务。 net start MySql80
- 此时再重新登录mysql 会发现不需要密码就可以登录了，输入更改代码命令 改成你不会忘记的密码即可。 ALTER USER root@localhost IDENTIFIED WITH mysql_native_password BY 123456;
