1.下载MySQL 8
https://cdn.mysql.com//Downloads/MySQL-8.0/mysql-8.0.40-winx64.zip
2.创建my.ini
下载解压后，发现根目录没有my.ini文件，需手动创建
my.ini
# 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. It's 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 = D:\lsp\mysql-8.0.40-winx64
datadir = D:\lsp\mysql-8.0.40-winx64\data
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几个关于charset的编码设置，由于我需要运行Zr.Admin项目，显示表情包之类的内容，所以都设置为utf8mb4
basedir、datadir 根据实际解压路径配置
3.初始化root密码
用管理员身份打开cmd，然后进入到bin目录
执行
mysqld --initialize --user=mysql --console
图中root@localhost: 后面就是生成的root用户的初始密码
4.设置root密码
启动MySQL服务
执行
mysqld.exe --console在bin目录打开另外的cmd窗口
执行
mysql.exe -u root -p
根据提示，输入刚才初始化root的密码，回车进入MySQL操作界面
设置root密码
执行
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'Admin@2333';PS：使用set password='Admin@2333'; 也可以
MySQL8有相关的密码策略，需要8位以上且包含大小写字母、数字、特殊字符
退出MySQL界面，用新密码重新登录
