xcopy——目录复制命令
1．功能：复制指定的目录和目录下的所有文件连同目录结构。
3．格式：xcopy [源盘：]〈源路径名〉[目标盘符：][目标路径名][/s][/v][/e]
（1）xcopy是copy的扩展，可以把指定的目录连文件和目录结构一并拷贝，但不能拷贝隐藏文件和系统文件；
（2）使用时源盘符、源目标路径名、源文件名至少指定一个；
（3）选用/s时对源目录下及其子目录下的所有文件进行copy。除非指定/e参数，否则/s不会拷贝空目录，若不指定/s参数，则xcopy只拷贝源目录本身的文件，而不涉及其下的子目录；
（4）选用/v参数时，对的拷贝的扇区都进行较验，但速度会降低。(Xcopy - directory replication command
1. function: copy the specified directory and all the files under the directory together with the directory structure.
3. format: xcopy [source]: "source disk path": [] [target letter target path][/s][/v][/e]
(1) xcopy is an extension of copy, which can copy the specified directory and file and directory structure, but can not copy the hidden files and system files.
(2) when using the source drive, the source destination path, specify at least one source file name;
(3) copy for all files under the source directory and its subdirectories when /s is selected. Unless /e parameter is specified, /s will not copy the empty directory. If no /s parameter is specified, xcopy will copy the file of the source directory itself instead of its sub directory.
(4) when the /v parameter is selected, all the sectors of the copy are tested, but the speed will be reduced.)