批处理文件：如何连接文本文件中的每一行？ [英] Batch Files: How to concatenate each line in a text file?

问题描述

我有一个文本文件，每行有文本。我想要能够把每一行在一个长线与一个空格。所以，如果文本文件有：

  Bob 
 Jack 
 Sam 
  

我想要的结果是

  Bob Jack Sam 
  

以下是我正在开发的两种方法，括号中的任何内容意味着我知道语法是完全错误的;我只是把它放在那里，以显示我的思想过程。评论部分只是我的实验，我已经离开他们，以防任何人想评论他们会做什么/为什么他们做他们做什么。

方法1： / p>

  @echo off 
 SETLOCAL EnableDelayedExpansion 
 SET count = 1 
 FOR / Ftokens = * delims = usebackq%% x IN（afile.txt）DO（
 SET var！count！= %% x 
 for %% a in（！count！）do（
！var %% a！=！var %% a！&
 echo！var %% a！
）
 SET / a count =！count！ $ b echo！count！
）
 
 :: echo！var1！ ！var2！ ！var3！ 
 startfirefox.exe！var %% a！-1 
 
 ENDLOCAL 
 
 :: echoendlocal％var1％％var2％％var3％方法2：
 
 
  @echo off 
 SETLOCAL EnableDelayedExpansion 
 SET count = 1 
 FOR / Ftokens = * delims = usebackq%% x IN（afile.txt）DO （
 SET var！count！= %% x 
 call echo %% var！count！%% 
 
 SET / a count =！count！+1 
 echo！count！
）
 
 :: echo！var1！ ！var2！ ！var3！ 
 startfirefox.exe ^ 
 [i = 1] 
 [for i to！count！ do（] 
 call echo %% var！count！%%&&^ 
 
 ENDLOCAL 
 
 :: echoendlocal％ var1％％var2％％var3％
  
 
 
解决方案
有三个值，可以直接从文件中检索它们
 < input.txt（
 set / p line1 =
 set / pline2 =
 set / pline3 =
）
 setvar =％line1％％line2％％line3％
 echo（％var％
  
如果不知道值的数量，  $  for / f 命令读取行并将内容连接到变量。
  @echo off 
 setlocal enableextensions enabledelayedexpansion 
 
 setvar =
 for / fusebackq delims =%% a in（input.txt） do setvar =！var！%% a
 echo（％var％
  
但是如果数据可以包含惊叹号，延迟扩展状态将删除它们（和它们包围的文本）。要避免它，可以使用
  @echo off 
 setlocal enableextensions disabledelayedexpansion 
 
 setvar =
 for / fusebackq delims =%% a in（input.txt）do（
 setlocal enabledelayedexpansion 
 for / ftokens = * delims =¬ %% b in（¬！var！）do endlocal& setvar = %% b %% a
）
 echo（％var％
  
其中 setlocal / endlocal 和内部  c> 
 
 
 
  
 
 
 
  @echo off 
 setlocal enableextensions disableelayedexpansion 
 
 for / fdelims = %% a in（'
< nul cmd / q / cfor / fusebackq delims =%% z in（input.txt^）do（set / p。= %% z^）
'）do setvar = %% a
 
 echo（％var％
  
 
 
 
它运行一个 cmd 实例将输入行作为只有一个输出行（ < nul set / p 用于输出没有换行符的数据，因此所有数据都在同一行）。这包裹在中以检索变量中的输出
 
I have a text file with text on each line. I would like to be able to put each line in one long line along with a space. So, if the text file has:
Bob
Jack
Sam
I want the result to be 
Bob Jack Sam
Below are two methods that I am working on but I am stuck. Anything in brackets [] means that I know the syntax is completely wrong; I only put it there to show my thought process. The commented sections are just me experimenting and I have left them in case anyone wants to comment on what they would do / why they do what they do.

Method 1:
@echo off
SETLOCAL EnableDelayedExpansion
SET count=1
FOR /F "tokens=* delims= usebackq" %%x IN ("afile.txt") DO (
SET var!count!=%%x
for %%a in (!count!) do (
!var%%a! = !var%%a! & " "
echo !var%%a!
)
SET /a count=!count!+1
echo !count!
)

::echo !var1! !var2! !var3!
start "" firefox.exe !var%%a!-1

ENDLOCAL

::echo "endlocal" %var1% %var2% %var3%
Method 2:
@echo off
SETLOCAL EnableDelayedExpansion
SET count=1
FOR /F "tokens=* delims= usebackq" %%x IN ("afile.txt") DO (
SET var!count!=%%x
call echo %%var!count!%%

SET /a count=!count!+1
echo !count!
)

::echo !var1! !var2! !var3!
start "" firefox.exe ^
[i = 1]
[for i to !count! do (]
call echo %%var!count!%% & " " & " "^

ENDLOCAL

::echo "endlocal" %var1% %var2% %var3%

解决方案
If you only have three values, you can directly retrieve them from the file
< input.txt (
    set /p "line1="
    set /p "line2="
    set /p "line3="
)
set "var=%line1% %line2% %line3%"
echo("%var%"
If you don't know the number of values, use a for /f command to read the lines and concatenate the contents into a variable. 
@echo off
    setlocal enableextensions enabledelayedexpansion

    set "var="
    for /f "usebackq delims=" %%a in ("input.txt") do set "var=!var!%%a "
    echo("%var%"
But if the data can contain exclamation signs, the delayed expansion state will remove them (and the text surounded by them). To avoid it, this can be used
@echo off
    setlocal enableextensions disabledelayedexpansion

    set "var="
    for /f "usebackq delims=" %%a in ("input.txt") do (
        setlocal enabledelayedexpansion
        for /f "tokens=* delims=¬" %%b in ("¬!var!") do endlocal & set "var=%%b%%a "
    )
    echo("%var%"
where the setlocal/endlocal and the inner for are used to avoid problems with ! character

Or you can try something like this
@echo off
    setlocal enableextensions disabledelayedexpansion

    for /f "delims=" %%a in ('
        "<nul cmd /q /c "for /f "usebackq delims=" %%z in ("input.txt"^) do (set /p ".=%%z "^)""
    ') do set "var=%%a"

    echo("%var%"
It runs a cmd instance to output the input lines as only one output line (<nul set /p is used to ouput the data without line feeds, so all data is in the same line). This is wrapped in a for to retrieve the output inside a variable

                        
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