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获取 Windows 批处理文件中的最后一个命令行参数

发布于 2024-11-03 18:46:06 字数 41 浏览 0 评论 0原文

我需要将最后一个参数传递给 Windows 批处理脚本，我该怎么做？

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花心好男孩 2024-11-10 18:46:06

这将获取参数的计数：

set count=0
for %%a in (%*) do set /a count+=1

要获取实际的最后一个参数，您可以执行以下操作

for %%a in (%*) do set last=%%a

请注意，如果命令行具有不平衡的引号，这将失败 - 命令行将通过 for 重新解析，而不是直接解析使用用于 %1 等的解析。

This will get the count of arguments:

set count=0
for %%a in (%*) do set /a count+=1

To get the actual last argument, you can do

for %%a in (%*) do set last=%%a

Note that this will fail if the command line has unbalanced quotes - the command line is re-parsed by for rather than directly using the parsing used for %1 etc.

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银河中√捞星星 2024-11-10 18:46:06

最简单也可能是最可靠的方法是仅使用 cmd 自己的参数解析，然后 shift 直到没有更多参数为止。

由于这会破坏 %1 等的使用，因此您可以在子例程中执行此操作：

@echo off
call :lastarg %*
echo Last argument: %LAST_ARG%
goto :eof

:lastarg
  set "LAST_ARG=%~1"
  shift
  if not "%~1"=="" goto lastarg
goto :eof

The easiest and perhaps most reliable way would be to just use cmd's own parsing for arguments and shift then until no more are there.

Since this destroys the use of %1, etc. you can do it in a subroutine:

@echo off
call :lastarg %*
echo Last argument: %LAST_ARG%
goto :eof

:lastarg
  set "LAST_ARG=%~1"
  shift
  if not "%~1"=="" goto lastarg
goto :eof

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反差帅 2024-11-10 18:46:06

joey 的答案的增强版本：

@ECHO OFF
SETLOCAL

:test
    :: https://stackoverflow.com/a/5807218/7485823
    CALL :lastarg xxx %*
    ECHO Last argument: [%XXX%]
    CALL :skiplastarg yyy %*
    ECHO skip Last argument: [%yyy%]
GOTO :EOF

:: Return all but last arg in variable given in %1
:skiplastarg returnvar args ...
    SETLOCAL
        SET $return=%1
        SET SKIP_LAST_ARG=
        SHIFT
    :skiplastarg_2
        IF NOT "%~2"=="" SET "SKIP_LAST_ARG=%SKIP_LAST_ARG% %1"
        SHIFT
        IF NOT "%~1"=="" GOTO skiplastarg_2
    ENDLOCAL&CALL SET "%$return%=%SKIP_LAST_ARG:~1%"
GOTO :EOF

:: Return last arg in variable given in %1
:lastarg returnvar args ...
    SETLOCAL
      SET $return=%1
      SET LAST_ARG=
  SHIFT
    :LASTARG_2
      SET "LAST_ARG=%1"
      SHIFT
      IF NOT "%~1"=="" GOTO lastarg_2
    ENDLOCAL&call SET %$return%=%LAST_ARG%
GOTO :EOF

使用参数运行它：

abe“ba na na”“圆”

并得到：

最后一个参数：[“圆”]
跳过最后一个参数：[abe "ba na na"]

An enhanced version of joey's answer:

@ECHO OFF
SETLOCAL

:test
    :: https://stackoverflow.com/a/5807218/7485823
    CALL :lastarg xxx %*
    ECHO Last argument: [%XXX%]
    CALL :skiplastarg yyy %*
    ECHO skip Last argument: [%yyy%]
GOTO :EOF

:: Return all but last arg in variable given in %1
:skiplastarg returnvar args ...
    SETLOCAL
        SET $return=%1
        SET SKIP_LAST_ARG=
        SHIFT
    :skiplastarg_2
        IF NOT "%~2"=="" SET "SKIP_LAST_ARG=%SKIP_LAST_ARG% %1"
        SHIFT
        IF NOT "%~1"=="" GOTO skiplastarg_2
    ENDLOCAL&CALL SET "%$return%=%SKIP_LAST_ARG:~1%"
GOTO :EOF

:: Return last arg in variable given in %1
:lastarg returnvar args ...
    SETLOCAL
      SET $return=%1
      SET LAST_ARG=
  SHIFT
    :LASTARG_2
      SET "LAST_ARG=%1"
      SHIFT
      IF NOT "%~1"=="" GOTO lastarg_2
    ENDLOCAL&call SET %$return%=%LAST_ARG%
GOTO :EOF

Run it with the arguments:

abe "ba na na" "cir cle"

and get:

Last argument: ["cir cle"]
skip Last argument: [abe "ba na na"]

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神妖 2024-11-10 18:46:06

set first=""
set last=""
for %%a in (%*) do (
SETLOCAL ENABLEDELAYEDEXPANSION
if !first!=="" (set first=!last!) else (set first=!first! !last!)
set last=%%a

)
ENDLOCAL & set "last=%last%" & set "first=%first%"
echo %last%  "and" %first%

set first=""
set last=""
for %%a in (%*) do (
SETLOCAL ENABLEDELAYEDEXPANSION
if !first!=="" (set first=!last!) else (set first=!first! !last!)
set last=%%a

)
ENDLOCAL & set "last=%last%" & set "first=%first%"
echo %last%  "and" %first%

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