如何在 BATCH 文件中使用 SWITCH 解析命令行参数 [英] How to parse command line arguments with SWITCH in BATCH file

问题描述

我们正在尝试创建一个 switch 语句来解析批处理文件中的命令行参数.

We are trying to make a switch statement which is parsing command line argument in a batch file.

mybatch.bat -a 10 -b name -c India --zipcode 20

只有-a、-b、-c是解析参数(以-开头).

Only -a, -b, -c are parsing parameter (which is starts with -).

我们的代码如下:

for %%x in (%*) do (
     switch(%%x) (
          case a:
                 SET first_number=%arg%
                 break
          case b:
                 SET name=%arg%
          case c:
                 for %%x in (%*) do (
                       SET place =%place% %arg%
                  )
          default:
                  echo wrong parameter
           )

推荐答案

通常你会尽量保持简单，并为参数设置一个顺序.要以任何方式处理参数，随机顺序比仅仅知道 %1 = 数字、%2 = 名称和 %3 以上 = 位置要费力得多.

Normally you try to keep things simple and have a set order for the parameters. To handle parameters in any, random order is a lot more effort than just knowing that %1 = number, %2 = name and %3 onwards = place.

也就是说，这是一个解决方案的尝试.我忽略了 place 部分中的 --params，只是将这些值连接在一起.

That said, here's an attempt at a solution. I'm ignoring --params in the place section, just joining the values together.

@echo off
setlocal

:loop
if x%1 equ x goto done
set param=%1
if %param:~0,1% equ - goto checkParam
:paramError
echo Parameter error: %1 

:next
shift /1
goto loop

:checkParam
if "%1" equ "-a" goto A
if "%1" equ "-b" goto B
if "%1" equ "-c" goto C
goto paramError

:A
    shift /1
    set first_number=%1
    goto next

:B
    shift /1
    set name=%1
    goto next

:C
    set place=
:GetPlaces
    shift /1
    set param=%1
    if not defined param goto donePlaces
    if %param:~0,2% equ -- (
        shift /1
        goto processPlace
    )
    if %param:~0,1% equ - goto donePlaces
:processPlace
echo.%place%
    if x%1 neq x (
        set place=%place% %1
        goto GetPlaces
    )
:donePlaces
    rem remove leading space
    if defined place set place=%place:~1%
    goto loop



:done

echo num=%first_number%     name=%name%     place=%place%

这篇关于如何在 BATCH 文件中使用 SWITCH 解析命令行参数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！