中国DOS联盟

@echo off
set flag=
echo :123>test.txt
more b.bat>>test.txt
setlocal enabledelayedexpansion
for /f "skip=1" %%i in (a.bat) do (
    set var=%%i
    if "!var:~0,1!"==":" set flag=1
    if !flag! equ 1 echo %%i>>test.txt
)
start test.txt

@echo off
cd.>>b.txt
>test.txt echo /^:123$/,/^:asdk$/c\
>>test.txt echo :123\
>>test.txt echo :asdk
gsed -f test.txt a.txt|gsed "/:123/r\b.txt"|more>test.txt
type test.txt
pause

@echo off
    setlocal enabledelayedexpansion

    rem 下面三个文件名自行更改，若路径包含空格注意加引号
    set file=a.bat
    set nextFile=b.txt
    set newFile=c.txt

    set num=
    set strRows=

    rem 指定过滤标号
    set "strBegan=:123"
    set "strEnd=:asdk"

    rem 获得过滤标号行号
    for /f "delims=:" %%i in ('findstr /nr "^:" %file%') do set "strRows=!strRows! %%i"

    rem 读源文件1到变量
    for /f "delims=" %%i in ('findstr .* %file%') do (
        set /a num += 1
        set "!num!=%%i"
    )

    rem 对比内容获得需要过滤的开始结束指针
    for %%i in (%strRows%) do (
        if "!%%i!" == "!strBegan!" set began=%%i
        if "!%%i!" == "!strEnd!" set end=%%i
    )

    rem 下面把3部分打印到新文件中
    set /a end -= 1
    for /l %%i in (1,1,%began%) do echo,!%%i!>%newFile%
    type %nextFile% >>%newFile%
    more +%end% %file% >>%newFile%

exit /b 0