windows实现tail

下载tail.exe :: %date% 2008/04/22 周三 :: %date:/=-% 2008-04-22 周三 =号右边替换左边 :: %date:/=% 20080422 周三 :: %date:~-0,10% 2008/04/22 :: %date:~-2% 周三 :: %date:~0,4%%date:~5,2%%date:~8,2% 20080422 :: %time:~0,5% 提取时分 10:06 :: %time:~0,-3% 提取时分秒 10:06:2