[网络连接] 批处理解决window7 hosts被注释问题

setlocal enabledelayedexpansion
for /f "delims=" %%1 in (host) do (
	set temp=%%1
	set temp=!temp:#=!
	echo !temp!
)
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@echo off&&setlocal enabledelayedexpansion 
set datais=%SystemRoot%\system32\drivers\etc\
if exist !datais!hosts_bak del !datais!hosts_bak/f/q
for /f "tokens=*" %%a in (!datais!hosts) do (
set var=%%a
set "var=!var:#= !"
>>!datais!hosts.txt echo !var!
)
ren !datais!hosts hosts_bak
ren !datais!hosts.txt hosts
echo 处理完毕。
pause>nul
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@echo off
set "hostfile=C:\WINDOWS\system32\drivers\etc\hosts"
set "tempfile=%temp%\host.tmp"
for /f "delims=:" %%a in ('findstr /n "127.0.0.1 ::1 localhost" "%hostfile%"') do (
    set "num=%%a"
)
type nul >"%tempfile%"
for /f "tokens=1* delims=:" %%a in ('findstr /n .* "%hostfile%"') do (
    set "str=%%b"
    setlocal enabledelayedexpansion
    if %%a leq %num% (
        >>"%tempfile%" echo,%%b
    ) else if "!str:~0,1!" equ "#" (
        >>"%tempfile%" echo,!str:~1!
    ) else (
        >>"%tempfile%" echo,%%b
    )
    endlocal
)
move /y "%tempfile%" "%hostfile%"
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