您的代码存在一些问题 :)
1）正如您所说，您的代码忽略以“;”开头的行 - 这是由于默认的FOR /F EOL选项引起的。但是，由于“TOKENS = *”，您的代码也会剥离每行的前导空格。您需要将EOL和DELIMS都设置为“nothing”。语法很奇怪，但它能够工作：
for /f delims^=^ eol^= %%i ...
2) 你试图在一个括号代码块中设置和扩展变量。这是不可能的，因为当解析该行时会发生扩展，并且整个代码块将一次性解析。因此%var%的值是在循环执行之前存在的值，显然这不是你想要的。解决方案是使用延迟扩展。在命令提示符下键入FOR /?以获取有关延迟扩展的更多信息（在帮助列表的中间位置）。
3) 对于包含!的变量内容，在启用延迟扩展时进行扩展会导致内容被破坏。解决方案是根据需要在循环内部切换延迟扩展的开关。但这会导致一个复杂的问题，因为你需要跨ENDLOCAL屏障保留正在增长的行的值。我使用FOR /F在屏障上运输值。
以下是应该能够完成任务的完整批处理脚本。它的局限性在于无法处理大于约8191字节的行。
为修复一个重要的错误，已重新编写了这段代码
@echo off
setlocal disableDelayedExpansion
set "ln="
set "print=0"
for /f delims^=^ eol^= %%i in (myfile.txt) do (
set "var=%%i"
setlocal enableDelayedExpansion
for /f delims^=^ eol^= %%A in ("!ln!!var!") do (
if "!var:~-1!"==";" (
endlocal
echo %%A
set "ln="
) else (
endlocal
set "ln=%%A"
)
)
)
SET /P 解释：
有一种更简单的解决方案，它立即打印每一行，因此您不必担心在 ENDLOCAL 间传输变量。行末没有 ; 的行将使用 SET /P 打印而无需换行。
这种解决方案有以下限制:
1) 通过 SET /P 打印的行将删除前导空格。此限制仅适用于 Vista 和更新版本的 Windows。在 XP 上不是问题。
2) 感谢 David Ruhmann，我现在知道如果行以 = 开头，则 SET /P 将失败。非常不幸 :(
@echo off
setlocal disableDelayedExpansion
set "ln="
for /f delims^=^ eol^= %%i in (myfile.txt) do (
set "var=%%i"
setlocal enableDelayedExpansion
if "!var:~-1!"==";" (echo !var!) else (<nul set /p ="!var!")
endlocal
)
混合批处理/JScript正则表达式解决方案（强大且稳定）
我编写了一个名为REPL.BAT的混合批处理/JScript实用程序，可以轻松进行文件内容的正则表达式搜索和替换。使用它可以使工作变得非常容易。
下面的命令应该对任何输入都有效，没有限制。它已经更新，支持Windows和Unix样式的行。并且它比纯批处理解决方案快得多。
findstr "^." myfile.txt|repl "([^;\r])\r?\n" "$1" m >"outFile.txt"
这里是REPL.BAT实用程序。完整文档已嵌入脚本中。
@if (@X)==(@Y) @end /* Harmless hybrid line that begins a JScript comment
::************ Documentation ***********
:::
:::REPL Search Replace [Options [SourceVar]]
:::REPL /?
:::
::: Performs a global search and replace operation on each line of input from
::: stdin and prints the result to stdout.
:::
::: Each parameter may be optionally enclosed by double quotes. The double
::: quotes are not considered part of the argument. The quotes are required
::: if the parameter contains a batch token delimiter like space, tab, comma,
::: semicolon. The quotes should also be used if the argument contains a
::: batch special character like &, |, etc. so that the special character
::: does not need to be escaped with ^.
:::
::: If called with a single argument of /? then prints help documentation
::: to stdout.
:::
::: Search - By default this is a case sensitive JScript (ECMA) regular
::: expression expressed as a string.
:::
::: JScript syntax documentation is available at
::: http://msdn.microsoft.com/en-us/library/ae5bf541(v=vs.80).aspx
:::
::: Replace - By default this is the string to be used as a replacement for
::: each found search expression. Full support is provided for
::: substituion patterns available to the JScript replace method.
::: A $ literal can be escaped as $$. An empty replacement string
::: must be represented as "".
:::
::: Replace substitution pattern syntax is documented at
::: http://msdn.microsoft.com/en-US/library/efy6s3e6(v=vs.80).aspx
:::
::: Options - An optional string of characters used to alter the behavior
::: of REPL. The option characters are case insensitive, and may
::: appear in any order.
:::
::: I - Makes the search case-insensitive.
:::
::: L - The Search is treated as a string literal instead of a
::: regular expression. Also, all $ found in Replace are
::: treated as $ literals.
:::
::: E - Search and Replace represent the name of environment
::: variables that contain the respective values. An undefined
::: variable is treated as an empty string.
:::
::: M - Multi-line mode. The entire contents of stdin is read and
::: processed in one pass instead of line by line. ^ anchors
::: the beginning of a line and $ anchors the end of a line.
:::
::: X - Enables extended substitution pattern syntax with support
::: for the following escape sequences:
:::
::: \\ - Backslash
::: \b - Backspace
::: \f - Formfeed
::: \n - Newline
::: \r - Carriage Return
::: \t - Horizontal Tab
::: \v - Vertical Tab
::: \xnn - Ascii (Latin 1) character expressed as 2 hex digits
::: \unnnn - Unicode character expressed as 4 hex digits
:::
::: Escape sequences are supported even when the L option is used.
:::
::: S - The source is read from an environment variable instead of
::: from stdin. The name of the source environment variable is
::: specified in the next argument after the option string.
:::
::************ Batch portion ***********
@echo off
if .%2 equ . (
if "%~1" equ "/?" (
findstr "^:::" "%~f0" | cscript //E:JScript //nologo "%~f0" "^:::" ""
exit /b 0
) else (
call :err "Insufficient arguments"
exit /b 1
)
)
echo(%~3|findstr /i "[^SMILEX]" >nul && (
call :err "Invalid option(s)"
exit /b 1
)
cscript //E:JScript //nologo "%~f0" %*
exit /b 0
:err
>&2 echo ERROR: %~1. Use REPL /? to get help.
exit /b
************* JScript portion **********/
var env=WScript.CreateObject("WScript.Shell").Environment("Process");
var args=WScript.Arguments;
var search=args.Item(0);
var replace=args.Item(1);
var options="g";
if (args.length>2) {
options+=args.Item(2).toLowerCase();
}
var multi=(options.indexOf("m")>=0);
var srcVar=(options.indexOf("s")>=0);
if (srcVar) {
options=options.replace(/s/g,"");
}
if (options.indexOf("e")>=0) {
options=options.replace(/e/g,"");
search=env(search);
replace=env(replace);
}
if (options.indexOf("l")>=0) {
options=options.replace(/l/g,"");
search=search.replace(/([.^$*+?()[{\\|])/g,"\\$1");
replace=replace.replace(/\$/g,"$$$$");
}
if (options.indexOf("x")>=0) {
options=options.replace(/x/g,"");
replace=replace.replace(/\\\\/g,"\\B");
replace=replace.replace(/\\b/g,"\b");
replace=replace.replace(/\\f/g,"\f");
replace=replace.replace(/\\n/g,"\n");
replace=replace.replace(/\\r/g,"\r");
replace=replace.replace(/\\t/g,"\t");
replace=replace.replace(/\\v/g,"\v");
replace=replace.replace(/\\x[0-9a-fA-F]{2}|\\u[0-9a-fA-F]{4}/g,
function($0,$1,$2){
return String.fromCharCode(parseInt("0x"+$0.substring(2)));
}
);
replace=replace.replace(/\\B/g,"\\");
}
var search=new RegExp(search,options);
if (srcVar) {
WScript.Stdout.Write(env(args.Item(3)).replace(search,replace));
} else {
while (!WScript.StdIn.AtEndOfStream) {
if (multi) {
WScript.Stdout.Write(WScript.StdIn.ReadAll().replace(search,replace));
} else {
WScript.Stdout.WriteLine(WScript.StdIn.ReadLine().replace(search,replace));
}
}
}
