for /f “delims=” %%a in (input.txt) do …
for /f “delims=” %%a in (‘type input.txt’) do …
for /f “delims=” %%a in (‘more ^< input.txt’) do …
However, only the last method (using the more command) will give consistent results across Windows NT, 2000, XP and 2003. The first method does not recognise unicode files. Also, the usebackq switch must be used if the input filename contains spaces. The second method, using the type command, also fails to recognise unicode files on Windows 2000, XP and 2003 if the input file does not begin with a bit order mark (BOM).
In all the examples, assume the contents of of the file numbers.txt to be:-
one
two
three
four
five
six
seven
eight
nine
ten
Displaying the first line
This example prints one.
@echo off & setlocal ENABLEEXTENSIONS
set “first=”
for /f “delims=” %%a in (‘more ^< numbers.txt’) do (
if not defined first set first=%%a
)
echo/%first%
Displaying the first X lines
This example prints one, two and three.
@echo off & setlocal ENABLEEXTENSIONS
set “lines=3”
set i=-1
set “ok=”
for /f “delims=” %%a in (‘more ^< numbers.txt’) do (
set/a i+=1 & for /f %%z in (‘echo/%%i%%’) do (
if “%%z”==”%lines%” set ok=1
)
if not defined ok echo/%%a
)
Displaying the last line
This example prints ten.
@echo off & setlocal ENABLEEXTENSIONS
for /f “delims=” %%a in (‘more ^< numbers.txt’) do set “last=%%a”
echo/%last%
Displaying the last X lines
This example prints nine and ten.
@echo off & setlocal ENABLEEXTENSIONS
set “lines=2”
for /f %%a in (‘find/c /v “” ^< numbers.txt’) do set/a skip=%%a-lines
for /f “delims=” %%a in (‘more/e +%skip% ^< numbers.txt’) do (
echo/%%a
)
Displaying the Nth line
This example prints three. Note that instead of using the more command’s /e switch, the skip option could have been used with the for /f command, however, this fails is it is set to any number less than one.
@echo off & setlocal ENABLEEXTENSIONS
set LineNo=3
set “line=”
set/a LineNo-=1
for /f “delims=” %%a in (‘more/e +%LineNo% ^< numbers.txt’) do (
if not defined line set “line=%%a”
)
echo/%line%
Displaying the Nth line plus X number of lines
This example prints five and six.
@echo off & setlocal ENABLEEXTENSIONS
set start=5
set “lines=2”
set/a i=-1,start-=1
set “ok=”
for /f “delims=” %%a in (‘more/e +%start% ^< numbers.txt’) do (
set/a i+=1 & for /f %%z in (‘echo/%%i%%’) do (
if “%%z”==”%lines%” set ok=1
)
if not defined ok echo/%%a
)
以上就是【批处理提取不同行上的内容的代码】的全部内容了,欢迎留言评论进行交流!
2. 分享目的仅供大家学习和交流,您必须在下载后24小时内删除!
3. 不得使用于非法商业用途,不得违反国家法律。否则后果自负!
4. 本站提供的源码、模板、插件等等其他资源,都不包含技术服务请大家谅解!
5. 如有链接无法下载、失效或广告,请联系管理员处理!
6. 本站资源售价只是赞助,收取费用仅维持本站的日常运营所需!
7. 如遇到加密压缩包,请使用WINRAR解压,如遇到无法解压的请联系管理员!
8. 精力有限,不少源码未能详细测试(解密),不能分辨部分源码是病毒还是误报,所以没有进行任何修改,大家使用前请进行甄别
丞旭猿论坛
暂无评论内容