环境：win10 64位 
mysql版本:mysql-5.7.9-winx64.zip （http://dev.mysql.com/downloads/mysql/）

首先声明一下，5.7.9这个版本的配置方式跟之前的免安装版配置不一样。(.msi安装版和其他版本的可以忽略该方法) 
步骤： 
1，在官网上下载了mysql-5.7.9-winx64.zip 这个文件之后， 解压到指定目录：F:\Java\mysql\mysql-5.7.9-winx64 
2，在F:\java\mysql\mysql-5.7.9-winx64 目录创建data文件夹 
3，将my.default.ini改名为my.ini放到bin目录，并且在my.ini目录加入如下代码： 
basedir = F:\java\mysql\mysql-5.7.9-winx64 
datadir = F:\java\mysql\mysql-5.7.9-winx64\data 
port = 3306 
4，配置环境变量，path=F:\java\mysql\mysql-5.7.9-winx64\bin 
5，以管理员权限打开命令行，进入到F:\java\mysql\mysql-5.7.9-winx64\bin目录， 
执行: mysqld –initialize –user=mysql –console 
6，先执行以上命令, 会生成库. 注意有个临时密码, 要记下来.

F:\java\mysql\mysql-5.7.9\bin>mysqld --initialize --user=mysql --console
2015-11-03T02:12:10.856918Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2015-11-03T02:12:10.856918Z 0 [Warning] 'NO_ZERO_DATE', 'NO_ZERO_IN_DATE' and 'ERROR_FOR_DIVISION_BY_ZERO' sql modes should be used with strict mode. They will be merged with strict mode in a future release. 2015-11-03T02:12:10.856918Z 0 [Warning] 'NO_AUTO_CREATE_USER' sql mode was not set. 2015-11-03T02:12:14.162565Z 0 [Warning] InnoDB: New log files created, LSN=45790 2015-11-03T02:12:14.884331Z 0 [Warning] InnoDB: Creating foreign key constraint system tables. 2015-11-03T02:12:15.123784Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 4d177d5b-81d0-11e5-bb66-c454443dc023. 2015-11-03T02:12:15.176861Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 2015-11-03T02:12:15.189872Z 1 [Note] A temporary password is generated for root@localhost: v2toK7w,TJ_< 

7,如本次执行的临时密码是：v2toK7w,TJ_< 
8, 执行安装服务命令： mysqld –install 
9，执行启动服务命令： net start mysql 
10，到此，mysql就安装好了。 然后执行:mysql -uroot -p 
11,输入刚才的密码:v2toK7w,TJ_< 
12,执行改密码命令：set password = password(‘password’) 
13，至此，就root账号的密码就被你改成password了