##test.txt##
First line = 1;*|:12345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345123451234512345
Second line = 5;*|:3215432;*|:21543215432154321543215432154321543215432154321543215432154321543215;*|:543215;*|:5432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321543215432154321
SetLocal EnableDelayedexpansion
for /F "tokens=* delims=" %%a in ('type "test.txt"') do (
set "Line=%%a"
echo Line: "!Line!"
)
显然，以上代码无法读取test.txt中的2行，因为每一行都超出了限制（8191个字符）。
通过键入
type "test.txt"
仍然导致test.txt文件中的两行。但是，一旦有2行进入for循环，就无法读取这些行。
我不需要整个行长，因此我尝试通过删除字符串的多余部分来预处理文本文件。例如，在上面的示例中，将行长度限制为8100。
1.如何在Windows环境中不使用记事本（任何GUI编辑器）的情况下编辑上述文本文件？
2.如果我不需要预处理文件，避免上述问题的诀窍是什么？
您可以使用块读取器，它将每一行拆分为最大大小为1023个字符的块。
@echo off
setlocal EnableDelayedExpansion
set pos=0
set line=
<long_text.txt (
FOR /F "tokens=1 delims=:" %%1 in ('findstr /o "^" long_text.txt') DO (
set new_pos=%%1
set /a size=new_pos-pos
set /a "chunks=(size-1+1022) / 1023"
if defined line echo Line: !line! chunks=!chunks!
set /a pos=new_pos
for /L %%# in (1 1 !chunks!) do (
set "partial="
set /p partial=
if defined partial (
echo #!line! chunk %%# -- !partial:~0,10! ... !partial:~-10!
)
)
set /a line+=1
)
)
外环FOR /F .. findstr /O用于通过计算两条线之间的位置差来确定每条线的长度。行长
用于计算要读取整行必须读取多少块。
一行本身被读取set /p（从的重定向读取<long_text.txt）。set /p内置限制为1023个字符。
因此set /p使用块时间。
要计算单行使用多少块，必须将行长度除以1023，但必须减去1个字符，因为LF不计数（而是CR）。这+1022是事实的结果，最后一个完整块之后的其余字符也必须被读取。
如果该行是1023的倍数（也是一个空行），则最后一个块可以为空。
唯一剩下的一点是最后一行。
此技术不会读取最后一行，但是在前面添加一个空行很容易。
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