1 去mysql官网下载，地址：mysql
选择downloads-------community
在左侧选择 mysql community server
下载win64 的压缩版 Windows (x86, 64-bit), ZIP Archive
点击download 进入下载页面 在页面最中下部选择
No thanks, just start my download.
然后你已经开始下载了
下载完后解压到你安装的地方
2添加环境变量在path后加上xx盘：/xx目录/mysql-5.7.12-winx64/bin
3 mysql-5.7.12-winx64目录下新建my.ini配置文件（也可以直接复制my-default文件然后改名），打开my.ini文件，里面写入以下内容（具体路径，以自己的为准）
# For advice on how to change settings please see# dev.mysql/doc/refman/5.7/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=utf8[mysqld]port=3306basedir ="D:/软件/web/mysql/mysql-5.7.12-winx64/"datadir ="D:/软件/web/mysql/mysql-5.7.12-winx64/data/"tmpdir ="D:/软件/web/mysql/mysql-5.7.12-winx64/data/"socket ="D:/软件/web/mysql/mysql-5.7.12-winx64/data/mysql.sock"log-error="D:/软件/web/mysql/mysql-5.7.12-winx64/data/mysql_error.log"#server_id = 2#skip-lockingmax_connections=100table_open_cache=256query_cache_size=1Mtmp_table_size=32Mthread_cache_size=8innodb_data_home_dir="D:/软件/web/mysql/mysql-5.7.12-winx64/data/"innodb_flush_log_at_trx_commit =1innodb_log_buffer_size=128Minnodb_buffer_pool_size=128Minnodb_log_file_size=10Minnodb_thread_concurrency=16innodb-autoextend-increment=1000join_buffer_size = 128Msort_buffer_size = 32Mread_rnd_buffer_size = 32Mmax_allowed_packet = 32Mexplicit_defaults_for_timestamp=truesql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"#sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
4 cmd 以管理员身份进入“命令提示符”
cd 进入mysql-5.7.12-winx64\bin目录下
输入：mysqld --initialize 会自动添加data目录
输入：mysqld install MySQL --defaults-file="D:/xx目录/mysql-5.7.12-winx64/my.ini" 具体路径根据自己的去写(如果提示已经有了 就输入mysqld remove 移除再执行上面的命令)
输入：net start mysql 就可以启动啦
mysql的默认密码为空哦， 你可以自己去设置mysql的密码
补充一下改密码的命令：
进入mydql>后
输入 mysql>use mysql
mysql> update user set authentication_string=password('123456')where user='root';
mysql> flush privileges;
mysql> quit
再次登陆就可以用自己的密码了哦