Batcher

如果不会使用if命令，请参考：
http://bbs.bathome.net/thread-2530-1-1.html

如果不会获取文件大小，请查看for命令的帮助：

In addition, substitution of FOR variable references has been enhanced. You can now use the following optional syntax:     %~I         - expands %I removing any surrounding quotes (")     %~fI        - expands %I to a fully qualified path name     %~dI        - expands %I to a drive letter only     %~pI        - expands %I to a path only     %~nI        - expands %I to a file name only     %~xI        - expands %I to a file extension only     %~sI        - expanded path contains short names only     %~aI        - expands %I to file attributes of file     %~tI        - expands %I to date/time of file     %~zI        - expands %I to size of file