以下应该适用于任何有效路径，只要它不是UNC 路径。路径可以是绝对的或相对的。它可以使用短文件名或长名称（或混合名称）。路径可以指文件夹或文件。
如果它是一个文件夹，结果将以结束，\如果它是一个文件，则以 no\结束。
该:getLongPath例程需要一个 inputPath 变量名称作为第一个参数，以及一个可选的返回变量名称作为第二个参数。inputPath 变量应包含有效路径。如果未指定返回变量，则将结果回显到屏幕（用引号括起来）。如果指定了返回变量，则在变量中返回结果（不带引号）。
如果要返回变量，则仅在禁用延迟扩展时才应调用该例程。!如果在启用延迟扩展的情况下调用，则如果结果包含该字符，则结果将被破坏。
测试用例（仅适用于我的机器）位于脚本的顶部，实际的例程位于底部。
@echo off
setlocal
for %%F in (
"D:\test\AB2761~1\AZCFE4~1.TXT"
"AB2761~1\AZCFE4~1.TXT"
"D:\test\AB2761~1\ZZCE57~1\"
"D:\test\a b\a z.txt"
"D:\test\a b\z z"
"."
"\"
"x%%&BAN~1\test"
"x%% & bang!\test"
) do (
echo(
echo resolving %%F
set "shortPath=%%~F"
call :getLongPath shortPath longPath
set longPath
)
echo(
echo(
set "shortPath=D:\test\AB2761~1\AZCFE4~1.TXT"
set shortPath
echo Calling :getLongPath with with no return variable
call :getLongPath shortPath
exit /b
:getLongPath path [rtnVar]
setlocal disableDelayedExpansion
setlocal enableDelayedExpansion
for %%F in ("!%~1!") do (
endlocal
set "sourcePath=%%~sF"
set "sourceFile=%%~nxF"
)
if not exist "%sourcePath%" (
>&2 echo ERROR: Invalid path
exit /b 1
)
set "rtn="
2>nul cd "%sourcePath%" || (
cd "%sourcePath%\.."
for /f "eol=: delims=" %%F in ('dir /b /a-d "%sourceFile%"') do set "rtn=%%F"
)
:resolveFolders
for %%F in ("%cd%") do (
cd ..
set "folder=%%~nxF"
)
if defined folder for /f "eol=: delims=" %%: in ('dir /b /ad') do (
if /i "%%~snx:" equ "%folder%" (
set "rtn=%%:\%rtn%"
goto :resolveFolders
)
)
set "rtn=%cd%%rtn%
( endlocal
if "%~2" equ "" (echo "%rtn%") else set "%~2=%rtn%"
)
=== 输出 ===
resolving "D:\test\AB2761~1\AZCFE4~1.TXT"
longPath=D:\test\a b\a z.txt
resolving "AB2761~1\AZCFE4~1.TXT"
longPath=D:\test\a b\a z.txt
resolving "D:\test\AB2761~1\ZZCE57~1\"
longPath=D:\test\a b\z z\
resolving "D:\test\a b\a z.txt"
longPath=D:\test\a b\a z.txt
resolving "D:\test\a b\z z"
longPath=D:\test\a b\z z\
resolving "."
longPath=D:\test\
resolving "\"
longPath=D:\
resolving "x%&BAN~1\test"
longPath=D:\test\x% & bang!\test\
resolving "x% & bang!\test"
longPath=D:\test\x% & bang!\test\
shortPath=D:\test\AB2761~1\AZCFE4~1.TXT
Calling :getLongPath with with no return variable
"D:\test\a b\a z.txt"
如果你想运行上面的代码，那么我建议你完全删除 和 之间的所有测试场景@echo off代码:getLongPath。然后您可以简单地调用脚本，将任何有效路径作为第一个参数传递。结果应该打印出正确的长路径。
我很惊讶使用批处理来解决这个问题有多么困难。我认为使用 JScript 或 VBS 并不容易（实际上，Ansgar 找到了一个不错的 VBS 解决方案）。但我喜欢 Ansgar 的简单 PowerShell 解决方案——简单多了。
更新
我发现了一个模糊的情况，如果从 FOR 循环中调用上述代码会失败，并且路径中恰好有 FOR 变量。它也不会正确地将带有通配符的路径报告为错误，并且当路径包含!.
所以我在下面创建了一个修改版本。我非常有信心它应该真正适用于所有情况，除了 UNC 路径，并且路径中可能没有 unicode。我将它打包为一个易于调用的过程，并附带内置文档。它可以作为独立脚本保留，也可以合并到更大的脚本中。
@echo off
:getLongPath
:::
:::getLongPath PathVar [RtnVar]
:::getLongPath /?
:::
::: Resolves the path contained in PathVar into the full long path.
::: If the path represents a folder then it will end with \
:::
::: The result is returned in variable RtnVar.
::: The result is echoed to the screen if RtnVar is not specified.
:::
::: Prints this documentation if the first argument is /?
if "%~1" equ "" (
>&2 echo ERROR: Insufficient arguments. Use getLongPath /? to get help.
exit /b 1
)
if "%~1" equ "/?" (
for /f "delims=" %%A in ('findstr "^:::" "%~f0"') do (
set "ln=%%A"
setlocal enableDelayedExpansion
echo(!ln:~3!
endlocal
)
exit /b 0
)
setlocal
set "notDelayed=!"
setlocal disableDelayedExpansion
setlocal enableDelayedExpansion
for /f "eol=: delims=" %%F in ("!%~1!") do (
endlocal
set "sourcePath=%%~sF"
set "sourcePath2=%%F"
set "sourceFile=%%~nxF"
)
if not exist "%sourcePath%" (
>&2 echo ERROR: Invalid path
exit /b 1
)
set "sourcePath3=%sourcePath2:**=%"
set "sourcePath3=%sourcePath3:?=%"
if "%sourcePath3%" neq "%sourcePath2%" (
>&2 echo ERROR: Invalid path
exit /b 1
)
set "rtn="
2>nul cd "%sourcePath%" || (
cd "%sourcePath%\.."
for /f "eol=: delims=" %%F in ('dir /b /a-d "%sourceFile%"') do set "rtn=%%F"
)
:resolveFolders
for %%F in ("%cd%") do (
cd ..
set "folder=%%~nxF"
)
if defined folder for /f "delims=: tokens=1,2" %%A in ("%folder%:%rtn%") do for /f "eol=: delims=" %%F in ('dir /b /ad') do (
if /i "%%~snxF" equ "%%A" (
set "rtn=%%F\%%B"
goto :resolveFolders
)
)
set "rtn=%cd%%rtn%"
if not defined notDelayed set "rtn=%rtn:^=^^%"
if not defined notDelayed set "rtn=%rtn:!=^!%"
if not defined notDelayed (set "!=!==!") else set "!="
for %%A in ("%rtn%") do (
endlocal
endlocal
if "%~2" equ "" (echo %%~A%!%) else set "%~2=%%~A"!
)
我还将 Ansgar 的 VBS 改编为混合 JScript/批处理脚本。它应该提供与上述纯批处理脚本相同的结果，但 JScript 更易于遵循。
@if (@X)==(@Y) @end /* harmless hybrid line that begins a JScrpt comment
@echo off
:getLongpath
:::
:::getLongPath PathVar [RtnVar]
:::getLongPath /?
:::
::: Resolves the path contained in PathVar into the full long path.
::: If the path represents a folder then it will end with \
:::
::: The result is returned in variable RtnVar.
::: The result is echoed to the screen if RtnVar is not specified.
:::
::: Prints this documentation if the first argument is /?
::************ Batch portion ***********
if "%~1" equ "" (
>&2 echo ERROR: Insufficient arguments. Use getLongPath /? to get help.
exit /b 1
)
if "%~1" equ "/?" (
for /f "delims=" %%A in ('findstr "^:::" "%~f0"') do (
set "ln=%%A"
setlocal enableDelayedExpansion
echo(!ln:~3!
endlocal
)
exit /b 0
)
setlocal
set "notDelayed=!"
setlocal disableDelayedExpansion
set "rtn="
for /f "delims=" %%A in ('cscript //E:JScript //nologo "%~f0" %*') do set "rtn=%%A"
if not defined rtn exit /b 1
if not defined notDelayed set "rtn=%rtn:^=^^%"
if not defined notDelayed set "rtn=%rtn:!=^!%"
if not defined notDelayed (set "!=!==!") else set "!="
for %%A in ("%rtn%") do (
endlocal
endlocal
if "%~2" equ "" (echo %%~A%!%) else set "%~2=%%~A"!
)
exit /b 0
************ JScript portion ***********/
var env=WScript.CreateObject("WScript.Shell").Environment("Process");
var fso=WScript.CreateObject("Scripting.FileSystemObject");
var app=WScript.CreateObject("Shell.Application");
var inPath=env(WScript.Arguments.Item(0));
var folder="";
var f;
if (fso.FileExists(inPath)) {
f=fso.GetFile(inPath);
}
else if (fso.FolderExists(inPath)) {
folder="\\"
f=fso.GetFolder(inPath);
if (f.IsRootFolder) {
WScript.StdOut.WriteLine(f.Path);
WScript.Quit(0);
}
}
else {
WScript.StdErr.WriteLine('ERROR: Invalid path');
WScript.Quit(1);
}
WScript.StdOut.WriteLine( app.NameSpace(f.ParentFolder.Path).ParseName(f.Name).Path + folder);