在windows里ctrl+R，并输入cmd

点击OK按钮进入命令行模式

输入 xcopy /? 然后回车

?参数出来的是帮助，很多人到这里就不用再讲了，不过为了清除起见，还是简单介绍下吧

XCOPY source ] ]

...]

source Specifies the file(s) to copy.

destination Specifies the location and/or name of new files.

/A Copies only files with the archive attribute set,

doesnt change the attribute.

/M Copies only files with the archive attribute set,

turns off the archive attribute.

/D:m-d-y Copies files changed on or after the specified date.

If no date is given, copies only those files whose

source time is newer than the destination time.

/EXCLUDE:file1...

Specifies a list of files containing strings. Each string

should be in a separate line in the files. When any of the

strings match any part of the absolute path of the file to be

copied, that file will be excluded from being copied. For

example, specifying a string like \obj\ or .obj will exclude

all files underneath the directory obj or all files with the

.obj extension respectively.

/P Prompts you before creating each destination file.

/S Copies directories and subdirectories except empty ones.

/E Copies directories and subdirectories, including empty ones.

Same as /S /E. May be used to modify /T.

/V Verifies the size of each new file.

/W Prompts you to press a key before copying.

/C Continues copying even if errors occur.

/I If destination does not exist and copying more than one file,

assumes that destination must be a directory.

/Q Does not display file names while copying.

/F Displays full source and destination file names while copying.

/L Displays files that would be copied.

/G Allows the copying of encrypted files to destination that does

not support encryption.

/H Copies hidden and system files also.

/R Overwrites read-only files.

/T Creates directory structure, but does not copy files. Does not

include empty directories or subdirectories. /T /E includes

empty directories and subdirectories.

/U Copies only files that already exist in destination.

/K Copies attributes. Normal Xcopy will reset read-only attributes.

/N Copies using the generated short names.

/O Copies file ownership and ACL information.

/X Copies file audit settings (implies /O).

/Y Suppresses prompting to confirm you want to overwrite an

existing destination file.

/-Y Causes prompting to confirm you want to overwrite an

existing destination file.

/Z Copies networked files in restartable mode.

/B Copies the Symbolic Link itself versus the target of the link.

/J Copies using unbuffered I/O. Recommended for very large files.

The switch /Y may be preset in the COPYCMD environment variable.

This may be overridden with /-Y on the command line.

简单拷贝文件到文件(文件不存在)，会问你拷贝到目标文件夹里还是目标文件里，这里选文件

如果目标文件以及存在了，就会问你是不是要覆盖已有文件

其实可以添加参数 /y, 表示不需要确认修改文件

参数 /d 表示如果目标文件比源文件老才覆盖，所以我修改了目标文件后再执行命令，没有任何拷贝

复制文件夹跟复制文件大同小异，只多讲一个参数 /s吧，表示子文件一起复制

如果还有其他特殊用法，仔细看看帮助里的参数说明，相信不是什么问题。