Question

我是Minecraft服务器的所有者，目前正致力于制作自动设置脚本，以便其他人可以更轻松地运行服务器。我已经完成了所有工作，但是在测试之后，这段代码抛出了一个＆＃34;命令的语法不正确＆＃34;错误。这是代码：

@ECHO OFF
SETLOCAL EnableDelayedExpansion
ECHO Welcome to the startup of your new Minecraft server^^!
ECHO Upon completion of the first start, please exit the program and run "start.bat".
ECHO When you are ready, press any key.
PAUSE>NUL
SET /p "hasrun" = < "%~dp0\hasrun.txt"

:Run
IF "!hasrun!" == "0" (
    ECHO "1" >> "%~dp0\hasrun.txt"
    java -Xms1024M -Xmx1024M -jar minecraft_server.jar nogui
) ELSE (
    ECHO This is not your first run^^! Use "start.bat" instead^^!
    PAUSE
)

错误似乎发生在ECHO "1" >> "%~dp0\hasrun.txt"的行。自从我上次批量编写任何东西以来已经有一段时间了，所以它可能是显而易见的。确切的输出（回声关闭）是：

Welcome to the startup of your new Minecraft server!  
Upon completion of the first start, please exit the program and run "start.bat".

When you are ready, press any key.

按下键以传递PAUSE后，它会显示：

The syntax of the command is incorrect.
This is not your first run! Use "start.bat" instead!
Press any key to continue...

此外，hasrun.txt的内容只是一个零。（＆＃34; 0＆＃34;没有引号）

Answer 1

您的问题是变量!hasrun!。您设置变量的方法会生成一个空的或无效的变量，如果该文件为空，则!hasrun!等于空，这将导致for循环失败。

@ECHO OFF
SETLOCAL EnableDelayedExpansion
ECHO Welcome to the startup of your new Minecraft server^^!
ECHO Upon completion of the first start, please exit the program and run "start.bat".
ECHO When you are ready, press any key.
PAUSE>NUL
:: Default variable set, or the for loops fails because "" does not equal "0".
if not exist "%~dp0\hasrun.txt" echo 0 >%~dp0\hasrun.txt
:: Set the file to a variable.
SET /p hasrun=<%~dp0\hasrun.txt

:Run
:: Space after "0 " appended because 0> refers to a debugging echo.
IF "!hasrun!"=="0 " (
    ECHO 1>"%~dp0\hasrun.txt"
    java -Xms1024M -Xmx1024M -jar minecraft_server.jar nogui
    pause
) ELSE (
    ECHO This is not your first run^^! Use "start.bat" instead^^!
    PAUSE
)
del %~dp0\hasrun.txt

Batchfile - 命令的语法不正确

1 个答案: