这篇文章主要为大家展示了“批处理如何提取不同行上的内容”，内容简而易懂，条理清晰，希望能够帮助大家解决疑惑，下面让小编带领大家一起研究并学习一下“批处理如何提取不同行上的内容”这篇文章吧。
创新互联建站是一家专注于成都网站设计、网站建设、
外贸网站建设与策划设计,雁江网站建设哪家好?
创新互联建站做网站,专注于网站建设十余年,网设计领域的专业建站公司;建站业务涵盖:雁江等地区。雁江做网站价格咨询:13518219792
for instance:-
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
)以上是“批处理如何提取不同行上的内容”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注创新互联行业资讯频道！
新闻名称：批处理如何提取不同行上的内容-创新互联
文章出自：
http://cdkjz.cn/article/jgjdh.html
