下载zip压缩包
https://dev.mysql.com/downloads/mysql/
配置环境变量
MYSQL_HOME
配置初始化的my.ini文件

[mysqld]
# 设置3306端口
port=3306
# 设置mysql的安装目录
basedir=C:\\Program Files\\Mysql\\mysql-8.0.19-winx64
# 设置mysql数据库的数据的存放目录
datadir=C:\\Program Files\\Mysql\\mysql-8.0.19-winx64\\data   
# 允许最大连接数
max_connections=200
# 允许连接失败的次数。这是为了防止有人从该主机试图攻击数据库系统
max_connect_errors=10
# 服务端使用的字符集默认为UTF8
character-set-server=utf8
# 创建新表时将使用的默认存储引擎
default-storage-engine=INNODB
# 默认使用“mysql_native_password”插件认证
default_authentication_plugin=mysql_native_password
[mysql]
# 设置mysql客户端默认字符集
default-character-set=utf8
[client]
# 设置mysql客户端连接服务端时默认使用的端口
port=3306
default-character-set=utf8

初始化数据库

mysqld --initialize --console

执行后会出现mysql的默认密码

C:\Users\kht>cd C:\Program Files\Mysql\mysql-8.0.19-winx64\binC:\Program Files\Mysql\mysql-8.0.19-winx64\bin>mysqld --initialize --console
2018-04-28T15:57:17.087519Z 0 [System] [MY-013169] [Server] C:\Program Files\MySQL\bin\mysqld.exe (mysqld 8.0.11) initializing of server in progress as process 4984
2018-04-28T15:57:24.859249Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: rI5rvf5x5G,E
2018-04-28T15:57:27.106660Z 0 [System] [MY-013170] [Server] C:\Program Files\MySQL\bin\mysqld.exe (mysqld 8.0.11) initializing of server has completedC:\Program Files\Mysql\mysql-8.0.19-winx64\bin>

表明rI5rvf5x5G,E这是密码
若出现

重新下载
https://www.microsoft.com/zh-CN/download/details.aspx?id=48145

修改默认密码

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '新密码';  

完成!!!