我已经成功编写了一个脚本，它需要一个字符串在特定文件中搜索，然后输出它第一次出现的行，然后我将该值放入 for 循环中并跳过解析该行数并写入它内容到一个新文件。然而，我没有得到空行，我发现这很难解决。
我正在搜索的字符串是“/]”，缓存它出现的行号，然后将其累积到一个以逗号分隔的变量中。然后，我再次将该变量放入 for 循环中，并检索第一个出现的值作为我的最终“跳过此行数”变量，然后在底部 for 循环中使用该变量，再次读取该文件并将其值写入一个新文件并跳过文件开头的行数。
这是执行我上面描述的脚本的部分：
setlocal enabledelayedexpansion
setlocal enableextensions
set live_svn_access_file=c:\csvn\data\conf\svn_access_file
set of=c:\test.txt
for /f "Tokens=1 Delims=:" %%i in ('findstr /n /c:"/]" %live_svn_access_file%') do (
rem cache value in a variable
set line=%%i
rem accumulate data to one variable
if defined line set skip=!skip!, !line!
)
rem strip first two characters in variable ", "
set skip=!skip:~2!
rem strip everything except first value in array
for /f "Tokens=1 Delims=," %%i in ('echo !skip!') do (
rem store value in a variable
set skip=%%i
)
rem calculate lines - 1 (arithmetic)
set /a skip=!skip!-1
set skip=!skip!
if not defined skip set error=Could not automatically find which parts to skip from live svn_access_file && goto error-handler
for /f "Tokens=* Delims= Skip=%skip%" %%i in (%live_svn_access_file%) do (
rem cache value in a variable
set read-input=%%i
rem write and append content of variable to output-file
echo !read-input! >> %of%
)
我重写了脚本以匹配工作脚本，这是更改后的脚本：
setlocal enabledelayedexpansion
setlocal enableextensions
set live_svn_access_file=c:\csvn\data\conf\svn_access_file
set of=c:\test.txt
for /f "Tokens=1 Delims=:" %%i in ('findstr /n /r /c:"\[..*\]" %live_svn_access_file%') do (
rem cache value in a variable
set line=%%i
rem accumulate data to one variable
if defined line set skip=!skip!, !line!
)
rem take the 2nd sections linenumber into a variable, skipping the first [*foo*]
for /f "Tokens=2 Delims=," %%i in ('"echo !skip!"') do (
rem store value in a variable
set skip=%%i
)
rem add 1 line to skip from retrieved value
set /a skip=!skip!-1
rem verify that number of lines to skip has been successfully retrieved, if not go to error-handler
if not defined skip set error=Could not automatically find which parts to skip from live svn_access_file && goto error-handler
if ["%skip%"] LSS ["1"] set error=Number of lines to skip was less than 1, this will most likely fail && goto error-handler
rem read live svn_access_file, but skip X-lines and write to output-file
setlocal DisableDelayedExpansion
for /f "usebackq Delims= Skip=%skip%" %%i in (`"findstr /n ^^ %live_svn_access_file%"`) do (
rem cache value in a variable
set read-input=%%i
rem write and append content of variable to output-file
setlocal EnableDelayedExpansion
rem strip line number prefix
set read-input=!read-input:*:=!
rem write read lines to output-file
echo(!read-input!>>%of%
endlocal
)
你有两个主要问题，FOR /F 无法读取空行（正如你所发现的），如果你使用延迟扩展，你会遇到行中感叹号和插入符的麻烦set read-input=%%i.
您可以通过使用 findstr 在每行前添加行号来解决空行问题。
第二个采用延迟切换技术。
SETLOCAL DisableDelayedExpansion
FOR /F "usebackq delims=" %%a in (`"findstr /n ^^ t.txt"`) do (
set "var=%%a"
SETLOCAL EnableDelayedExpansion
set "var=!var:*:=!" This removes the prefix
echo(!var!
ENDLOCAL
)
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