+---------------+--------------------------------------------+
| Variable_name | Value                                      |
+---------------+--------------------------------------------+
| datadir       | D:\database\mysql\mysql-5.1.58-win32\data\ |
+---------------+--------------------------------------------+
1 row in set (0.50 sec)

mysql>

------解决方案--------------------

你只需要登陆MYSQL，然后执行
show global variables like'%data%';
就能看到路径了。