Question

我在批号中驳斥了反响。

@echo off

那么,我就这样做了。

...
echo %INSTALL_PATH%
if exist %INSTALL_PATH%(
echo 222
...
)

我收到:

该系统无法找到具体的道路。

这两者之间的信息相呼应。

发出这一信息的原因何在,信息为何被忽视?

Answer 1

http://stackoverflow.com/a/8823746/740923” 隐藏指挥结果:>nul<>/code> 至此线末,并隐藏错误添加2>nul。例如:



Del /Q *.tmp >nul 2>nul


和说,你之所以出现错误,是因为您的变量正在扩大:


set INSTALL_PATH=C:My AppInstaller
if exist %INSTALL_PATH% (


Becomes:

if exist C:My AppInstaller (


这就意味着:


  如果存在“C:My”,将“AppInstaller”称为“(......)指挥线”。


你看到这一错误,因为你没有点名“App”。 引自防止这种分裂的道路。

Answer 2

除此以外 * 逐项存档,看差异

:: print echo command and its output
echo 1

:: does not print echo command just its output
@echo 2

:: print dir command but not its output
dir > null

:: does not print dir command nor its output
@dir c: > null

:: does not print echo (and all other commands) but print its output
@echo off
echo 3

@echo on
REM this comment will appear in console if  echo off  was not set

@set /p pressedKey=Press any key to exit

Answer 3

不能忽视“选择”。 “选择”是指你不想重复指挥,也不说指挥所制造的错误。

你所显示的线索,因此问题很可能没有。因此,请向我们展示更多内容。另外,请向我们说明INSTALL_PATH的确切价值。

Answer 4

@echo off
// quote the path or else it won t work if there are spaces in the path
SET INSTALL_PATH="c:\etc etc\test";
if exist %INSTALL_PATH% (
   //
   echo 222;
)

Answer 5

For me this issue was caused by the file encoding format being wrong. I used another editor and it was saved as UTF-8-BOM so the very first line I had was @echo off but there was a hidden character in the front of it.

So I changed the encoding to plain old ANSI text, and then the issue went away.

Answer 6

作为ANSI的储蓄文件

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