Split values into separate lines for each delimiter - batch

问题

I'm trying to split the values of a csv file into separate lines using the delimiter=, as a point to split from. i.e.

#csv file 
video1,video2,video3
video4,video5,video6

#Preferred output:
video1,
video2,
video3,
ect....

So far I have:

@echo off
setLocal EnableDelayedExpansion
for /f "tokens=* delims=, " %%a in (input.csv) do (
set /a N+=1
echo ^%%a^,>>output.csv
)

However I run into the issue of parameter %%a just being added as a string. How would I cause a split instead for each , and put the string onto a newline?

回答1:

@echo off
setLocal 
for /f "delims=" %%a in (input.csv) do (
 for %%i in (%%a) do echo %%i,>>output.csv
)

Each line is placed into %%a in turn.

Using the default list delimiters (space, comma, semicolon) the %%i for assigns each token in turn from the line in %%a to %%i

回答2:

This version can also handle empty columns and columns containing stuff like * or ?.

@echo off
setLocal EnableDelayedExpansion
for /f "delims=" %%a in (input.csv) do (
    set "line=%%a"
    echo reading line: !line!
    for /F "delims=" %%C in (""!line:^,^=^"^

"!"^") do (
        set "col=%%~C"
        echo   - !col!
    )
)

The trick is, that the ; will be replaced with "<newline>" and quotes are added to the front and end of the line.

video1,,video3 will be changed to

"video1"  
""
"video3"

The %%~C removes the outer quotes, to retrieve the desired column content

来源：https://stackoverflow.com/questions/40383897/split-values-into-separate-lines-for-each-delimiter-batch