批处理编程 - 获取文件的相对路径 [英] batch programming - get relative path of file

问题描述

使用DOS批处理，我要循环递归的目录，并阅读全文件路径，以及获得该文件的相对路径。例如，位于文件D：\\富\\酒吧\\ A \\ B \\ file.txt的将获得相对路径：\\酒吧\\ A \\ B \\

Using DOS batch, I want to loop recursively through a directory and read the fully file path, plus get the relative path of that file. For example, a file located in "D:\foo\bar\a\b\file.txt" will get the relative path: "\bar\a\b\"

现在我用这个code和它不工作

Right now I'm using this code and it does not work

FOR /R D:\Download\758_DATA\ %%F IN (*) DO (
    SET B = %%~pF
    Set B=%B:~-6%  ::take substring of the path
    ECHO.%B%
    ECHO %%F 
    ECHO.
)

任何人都可以帮忙吗？

Anyone can help, please?

推荐答案

我不知道你想完成什么，但至少这会给你一个很好的起点：

I'm not sure what you want to accomplish, but at least this will give you a good starting point:

@echo off & setlocal enabledelayedexpansion

set rootdir=D:\download

for /R %rootdir% %%F in (*) do (
    set B=%%~pF
    ::take substring of the path
    set B=!B:~0,-6!
    echo Full   : %%F 
    echo Partial: !B!
    echo.
)

既然你在循​​环中修改一个变量，你需要告诉你希望允许变量被扩大了与延时命令间preTER。这是 SETLOCAL enabledelayedexpansion 是什么。然后你可以使用！如写成这样的VAR分隔符，而不是％，和变量在运行时进行扩展。这是必要的，因为为 -loop将被称为像它是1单呼（你可以看到，当你离开了呼应了）

Since you're modifying a variable within a loop, you need to tell the command interpreter that you want to allow variables to be "expanded with delay". This is what the setlocal enabledelayedexpansion is for. Then you can use ! as a var delimiter instead of %, and variables written as such will be expanded at runtime. This is necessary because the for-loop will be called like it is 1 single call (you can see this when you leave out the echo off)

修改：修订后的例子，其中包括自动切断：

Edit: revised example which includes automatic cut off:

@echo off & setlocal enabledelayedexpansion

set rootdir=%~f1
set foo=%rootdir%
set cut=
:loop
if not "!foo!"=="" (
    set /a cut += 1
    set foo=!foo:~1!
    goto :loop
)
echo Root dir: %rootdir%
echo strlen  : %cut%

:: also remove leading /
set /a cut += 1

for /R %rootdir% %%F in (*) do (
    set B=%%~fF
    ::take substring of the path
    set B=!B:~%cut%!
    echo Full    : %%F 
    echo Partial : !B!
    echo""
)

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