转 批处理 %~dp0的意义

http://nealcai.iteye.com/blog/1685192

http://blog.csdn.net/caz28/article/details/7448677

http://stackoverflow.com/questions/3849095/does-a-bat-file-know-its-name-and-can-it-delete-itself

http://www.cnblogs.com/taoxu0903/archive/2010/03/02/1676690.html