Question

我正在尝试编写批处理文件来查找和替换hosts文件中的IP地址。

我做了一些研究并找到了这个，但它似乎没有用。我得到了“完成”的最终回声。但它不起作用。

@echo off

REM Set a variable for the Windows hosts file location
set hostpath=%systemroot%\system32\drivers\etc
set hostfile=hosts

REM Make the hosts file writable
attrib -r %hostpath%\%hostfile%

setlocal enabledelayedexpansion
set string=%hostpath%\%hostfile%

REM set the string you wish to find
set find=OLD IP

REM set the string you wish to replace with
set replace=NEW IP
call set string=%%string:!find!=!replace!%%
echo %string%

REM Make the hosts file un-writable
attrib +r %hostpath%\%hostfile%

echo Done.

Answer 1

您发布的代码只是尝试替换文件名中的值，而不是文件内容中的值。

您需要更改代码才能在文件内容中查找和替换。

要实现这一点，你需要（1）读取文件（2）查找并替换字符串并（3）回写

您必须阅读该文件。使用FOR命令。阅读HELP FOR并尝试以下代码。
```
for /f "tokens=*" %%a in (%hostpath%\%hostfile%) do (
  echo %%a
)
```

查找并替换

for /f "tokens=*" %%a in (%hostpath%\%hostfile%) do (
  set string=%%a
  set string=!string:%find%=%replace%!
  echo !string!
)

您必须将结果写回文件。将echo的输出重定向到临时文件，然后用临时文件

替换原始文件

echo. >%temp%\hosts
for /f "tokens=*" %%a in (%hostpath%\%hostfile%) do (
  set string=%%a
  set string=!string:%find%=%replace%!
  echo !string! >>%temp%\hosts
)
copy %temp%\hosts %hostpath%\%hostfile%

Answer 2

@echo off

REM Set a variable for the Windows hosts file location
set "hostpath=%systemroot%\system32\drivers\etc"
set "hostfile=hosts"

REM Make the hosts file writable
attrib -r -s -h "%hostpath%\%hostfile%"

REM set the string you wish to find
set find=OLD IP
REM set the string you wish to replace with
set replace=NEW IP

setlocal enabledelayedexpansion
for /f "delims=" %%a in ('type "%hostpath%\%hostfile%"') do (
set "string=%%a"
set "string=!string:%find%=%replace%!"
>> "newfile.txt" echo !string!
)

move /y "newfile.txt" "%hostpath%\%hostfile%"

REM Make the hosts file un-writable - not necessary.
attrib +r "%hostpath%\%hostfile%"

echo Done.
pause

Answer 3

这样可行。

call set newstring=%string:%find%=%replace%%

将结果值分配给新字符串。

如何使用批处理替换主机文件中的字符串？

3 个答案: