我根据这里的答案创建了这个小批处理脚本，因为有很多有效的答案。只要遵循相同的格式，可以随意添加:

REM Parameter-testing

Setlocal EnableDelayedExpansion EnableExtensions

IF NOT "%~1"=="" (echo Percent Tilde 1 failed with quotes) ELSE (echo SUCCESS)
IF NOT [%~1]==[] (echo Percent Tilde 1 failed with brackets) ELSE (echo SUCCESS)
IF NOT  "%1"=="" (echo Quotes one failed) ELSE (echo SUCCESS)
IF NOT [%1]==[] (echo Brackets one failed) ELSE (echo SUCCESS)
IF NOT "%1."=="." (echo Appended dot quotes one failed) ELSE (echo SUCCESS)
IF NOT [%1.]==[.] (echo Appended dot brackets one failed) ELSE (echo SUCCESS)

pause

我测试下面的代码，它是好的。

@echo off

set varEmpty=
if not "%varEmpty%"=="" (
    echo varEmpty is not empty
) else (
    echo varEmpty is empty
)
set varNotEmpty=hasValue
if not "%varNotEmpty%"=="" (
    echo varNotEmpty is not empty
) else (
    echo varNotEmpty is empty
)

脚本1:

输入(“删除引号。”cmd"这是一个测试")

@ECHO OFF

REM Set "string" variable to "first" command line parameter
SET STRING=%1

REM Remove Quotes [Only Remove Quotes if NOT Null]
IF DEFINED STRING SET STRING=%STRING:"=%

REM IF %1 [or String] is NULL GOTO MyLabel
IF NOT DEFINED STRING GOTO MyLabel


REM   OR   IF "." equals "." GOTO MyLabel
IF "%STRING%." == "." GOTO MyLabel

REM GOTO End of File
GOTO :EOF

:MyLabel
ECHO Welcome!

PAUSE

输出(没有，%1不是空的，空的，或NULL):

使用上面的脚本运行("Remove Quotes.cmd")，不带任何参数

输出(%1为空白、空或NULL):

Welcome!

Press any key to continue . . .

注意:如果你在If () ELSE()语句中设置了一个变量，它将在退出If语句后才对DEFINED可用(除非“延迟变量扩展”被启用;一旦启用，请使用感叹号“!”来代替百分比“%”符号}。

例如:

脚本2:

输入(“删除引号。”cmd"这是一个测试")

@ECHO OFF

SETLOCAL EnableDelayedExpansion

SET STRING=%0
IF 1==1 (
  SET STRING=%1
  ECHO String in IF Statement='%STRING%'
  ECHO String in IF Statement [delayed expansion]='!STRING!'
) 

ECHO String out of IF Statement='%STRING%'

REM Remove Quotes [Only Remove Quotes if NOT Null]
IF DEFINED STRING SET STRING=%STRING:"=%

ECHO String without Quotes=%STRING% 

REM IF %1 is NULL GOTO MyLabel
IF NOT DEFINED STRING GOTO MyLabel

REM GOTO End of File
GOTO :EOF

:MyLabel
ECHO Welcome!

ENDLOCAL
PAUSE

输出:

C:\Users\Test>"C:\Users\Test\Documents\Batch Files\Remove Quotes.cmd" "This is a Test"  
String in IF Statement='"C:\Users\Test\Documents\Batch Files\Remove Quotes.cmd"'  
String in IF Statement [delayed expansion]='"This is a Test"'  
String out of IF Statement='"This is a Test"'  
String without Quotes=This is a Test  

C:\Users\Test>  

注意:它还会从字符串中删除引号。

例如(使用脚本1或2): c:\ users \ test \ documents \批处理文件>"删除引号。cmd"这是"一个"测试"

输出(脚本2):

String in IF Statement='"C:\Users\Test\Documents\Batch Files\Remove Quotes.cmd"'  
String in IF Statement [delayed expansion]='"This is "a" Test"'  
String out of IF Statement='"This is "a" Test"'  
String without Quotes=This is a Test  

在脚本2中不带任何参数地执行("Remove Quotes.cmd"):

输出:

Welcome!

Press any key to continue . . .

用方括号代替引号:

IF [%1] == [] GOTO MyLabel

圆括号是不安全的:只能使用方括号。

总结一下:

set str=%~1
if not defined str ( echo Empty string )

如果%1为“”或“”或为空，此代码将输出“空字符串”。将其添加到目前不正确的公认答案中。

This way looks correct:

if "%~1" == "" if [%1] == [] echo Argument 1 is really empty.

First filter (if "%~1" == "") из safe way to detect argument is empty or "".
Second filter (if [%1] == []) will skip "" argument.
Remember we have two kind of empty arguments : really empty (nothing) and empty quotes "".
We have to detect both.

Next code takes all arguments "as is" in variable args:

:GetArgs
set args=%1
:ParseArgs
shift /1
if "%~1" == "" if [%1] == [] goto :DoneArgs
set args=%args% %1
goto :ParseArgs
:DoneArgs
if not defined args echo No arguments
if defined args echo Aguments are: %args%

This code correctly process "normal" arguments (simple words, "multiword phrases" or "") with balanced quotes.
Quoted arguments can even contain special chars like "a & b".
But it is still can fail with "abnormal" expressions with unbalanced quotes (do not use them).