教程：
http://blog.csdn.net/giianhui/article/details/7788550
SQL语句命令：
create or replace directory expdir as ‘D:\backup ‘;
grant read,write on directory expdir to public
select * from dba_directories
CMD命令：
expdp zbwlnew/111111@BKWL schemas=zbwlnew dumpfile=20170608.dmp
directory=expdir
原文：http://www.cnblogs.com/275147378abc/p/6963173.html