批处理命令%~dp0详解

批处理命令%~dp0详解

批处理命令%~dp0是什么意思

拆分解析

%0:批处理文件本身
~dp是变量扩充
d既是扩充到分区号
p就是扩充到路径
%~d0 - 仅将 %0扩充到一个驱动器号
%~p1 - 仅将 %0 扩充到一个路径

例子

假设一个批处理文件a.bat 存放在:F:\bat_test\a
在这里插入图片描述
内容为:rd /s /q %~dp0…\b\b_test\

运行a.bat h后b_test 文件夹被删除
rd: 删除文件
/s 表示除目bai录本身外,还将删除指定du目录下的所有子目录和文件。用于删除目录树。
/q 表示安静模式,带/s 删除目录树时不要求确认

故这个命令等同于: rd /s /q F:\bat_test\b\b_test
a.bat 存放在:F:\bat_test\a
这里的:%~dp0 == F:\bat_test\

@echo off rem @echo %cd% rem @echo %~d0 rem @echo %~dp0 rem @echo %~df0 set CAF_BOOT_HOME=%~dp0 rem set JAVA_HOME_PR=%~dp0jstack echo CAF_BOOT_HOME: %CAF_BOOT_HOME% echo %1 echo %2 set MD_BOOT_ARCH=%PROCESSOR_ARCHITECTURE% rem @echo %MD_BOOT_ARCH% set MD_BOOT_OS_KERNEL=win rem @echo %MD_BOOT_OS_KERNEL% @REM ==== START VALIDATION ==== if not "%JAVA_HOME%" == "" goto OkJHome echo. echo Error: JAVA_HOME not found in your environment. >&2 echo Please set the JAVA_HOME variable in your environment to match the >&2 echo location of your Java installation. >&2 echo. goto error :error set ERROR_CODE=1 @REM Set JAVA_HOME=%JAVA_HOME_PR%\runtime\java\%MD_BOOT_ARCH%-%MD_BOOT_OS_KERNEL% :OkJHome echo Checking java home: %JAVA_HOME% if exist "%JAVA_HOME%\bin\java.exe" goto doJob :doJob @setlocal enabledelayedexpansion for /r "%CAF_BOOT_HOME%\" %%k in (lcm-metadata-shell*.jar) do ( @set MD_BOOTSTRAP="%%k" ) echo Checking MD bootstrap: %MD_BOOTSTRAP% echo "%JAVA_HOME%\bin\java" -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005 -jar %MD_BOOTSTRAP% "%*" "%JAVA_HOME%\bin\java" -agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=5005 -Dloader.path="%CAF_BOOT_HOME%server\runtime\libs\" -jar %MD_BOOTSTRAP% "%*" 和@echo off rem @echo %cd% rem @echo %~d0 rem @echo %~dp0 rem @echo %~df0 set CAF_BOOT_HOME=%~dp0 rem set JAVA_HOME_PR=%~dp0jstack echo CAF_BOOT_HOME: %CAF_BOOT_HOME% echo %1 echo %2 set MD_BOOT_ARCH=%PROCESSOR_ARCHITECTURE% rem @echo %MD_BOOT_ARCH% set MD_BOOT_OS_KERNEL=win rem @echo %MD_BOOT_OS_KERNEL% @REM ==== START VALIDATION ==== if not "%JAVA_HOME%" == "" goto OkJHome echo. echo Error: JAVA_HOME not found in your environment. >&2 echo Please set the JAVA_HOME variable in your environment to match the >&2 echo location of your Java installation. >&2 echo. goto error :error set ERROR_CODE=1 @REM Set JAVA_HOME=%JAVA_HOME_PR%\runtime\java\%MD_BOOT_ARCH%-%MD_BOOT_OS_KERNEL% :OkJHome echo Checking java home: %JAVA_HOME% if exist "%JAVA_HOME%\bin\java.exe" goto doJob :doJob @setlocal enabledelayedexpansion for /r "%CAF_BOOT_HOME%\" %%k in (lcm-metadata-shell*.jar) do ( @set MD_BOOTSTRAP="%%k" ) echo Checking MD bootstrap: %MD_BOOTSTRAP% echo "%JAVA_HOME%\bin\java" -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005 -jar %MD_BOOTSTRAP% "%*" "%JAVA_HOME%\bin\java" -Dloader.path="%CAF_BOOT_HOME%server\runtime\libs\" -jar %MD_BOOTSTRAP% "%*" 的区别
最新发布
03-08
评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值