一、环境描述
操作系统：windows 2012
数据库：MysqL 5.7.12 企业版

二、操作步骤
1、规划
MysqL安装文件存放在D:\MysqL，数据目录为E:MysqLdata
2、配置文件位置为d:\MysqL\my.ini  内容如下：
[MysqLd]  
port = 3306  
basedir= D:\MysqL
datadir= E:\MysqLdata
max_connections=500  
character-set-server=utf8  
default-storage-engine=INNODB  
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES  
[MysqL]  
default-character-set=utf8

3、安装服务
C:\Users\admin>d:
D:\>cd MysqL\bin
D:\MysqL\bin>.\MysqLd -install 
4、初始化MysqL
.\MysqLd --initialize-insecure --user=MysqL
5、启动服务
D:\MysqL\bin>net start MysqL
MysqL 服务正在启动 .
MysqL 服务已经启动成功。
6、登陆数据库
D:\MysqL\bin>MysqL -uroot -p
Enter password:
Welcome to the MysqL monitor.  Commands end with ; or \g.
Your MysqL connection id is 2
Server version: 5.7.22 MysqL Community Server (GPL)

Copyright (c) 2000,2018,Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MysqL>
7、修改密码
use MysqL;
update MysqL.user set authentication_string=password('qwe12345') where user='root' and Host ='localhost';
flush privileges;
8、关闭服务
D:\MysqL\bin>net stop MysqL
MysqL 服务正在停止.
MysqL 服务已成功停止。