下载mysql 

https://mirrors.tuna.tsinghua.edu.cn/mysql/downloads/MySQL-5.7/mysql-5.7.30-winx64.zip

解压后在目录下创建my.ini文件

my.ini

[mysqld]
basedir=C:\app\http\mysql5.7
datadir=C:\app\http\mysql5.7\data
port=3306
character_set_server=utf8mb4
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

执行安装：

mysqld  --initialize-insecure

mysqld install

修改密码

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;