在Batch中读取带有特殊字符的文件

Question

如何在批处理中读取和解析具有特殊字符的文件？我有一个名为test.txt的文本文件,只有foo!!!bar一个批处理文件:

@echo off
setlocal enabledelayedexpansion enableextensions

FOR /F "tokens=* delims=" %%a IN (.\test.txt) DO (
    echo Unquoted is %%a
    echo Quoted is "%%a"
    set "myVar=%%a"
    echo myVar is still !myVar! or "!myVar!"
)
exit /b 0

我希望并期望它以foo!!!bar某种方式输出,但这输出:

Unquoted is foobar
Quoted is "foobar"
myVar is still foobar or "foobar"

当然我可以type test.txt,但我想处理文件的每一行.

Answer 1

您的问题是批处理解析器及其阶段的副作用.

在延迟扩展阶段扩展之前,FOR参数被扩展.
但是,当%%a是foo!!bar,则延迟扩展将消除感叹号,因为!!不是有效的变量扩展.

您需要切换延迟扩展,因为%%a只有在禁用延迟扩展的情况下扩展才是安全的.

@echo off
setlocal DisableDelayedExpansion enableextensions

FOR /F "tokens=* delims=" %%a IN (.\test.txt) DO (
    echo Unquoted is %%a
    echo Quoted is "%%a"
    set "myVar=%%a"

    setlocal enabledelayedexpansion 
    echo myVar is still !myVar! or "!myVar!"
    endlocal
)

您还可以查看CMD.EXE如何解析...