1.Question Description:

   1.1 version: mysql-5.7.11-64

   1.2 form: zip file

   1.3 >mysqld --install (successfully)

   1.4 you create a directory called "data" in the mysql package, and create a file my.ini and edit the code like 'datadir...' ,

   1.5 >net start mysql 

        you will see

2. Solution:

    2.1 uninstall the mysql clearly

         2.1.1 >mysqld --remove

         2.1.2   delete the mysql directory

         2.1.3    delete the regedit(http_local_machine)

    2.2  extract the mysql zip again,

           if your operation system is windows 2008 , you should extract the zip to the location where you can create directory without authirization(administrator role),

           because when you executor the command  mysqld --initialize,  you may see the error info: can't create the directory.....

    2.3  >mysqld --initialize

   3.  Thinking

     3.1 there are some solutions like copy data folder from version 5.6 to version 5.7;

     3.2 create my.ini file and cancel the comment "basedir","datadir..";

     Don't Mysql know that ??

     as the solution 2.3 show, we only need to executor the command "mysqld --initialize".

     So we should read the doc of the software first rather than read A or B in the web site.