变量表达式 %Var% 在批处理文件中的 for 循环中不起作用

Question

FOR /F "tokens=* USEBACKQ" %F IN (java -jar %MAVEN_HOME%jenkins-cli.jar -s http://someip.com build /dev/ -s  --username **** --password ***) DO (SET var=%F)

在这里%MAVEN_HOME%值没有被实际值替换，但是当我在没有for循环的情况下运行它时，它工作正常。

有些人可以解决这个问题并将MAVEN_HOME替换为实际值吗？

Answer 1

你需要像这样将命令放在` `中

FOR /F "tokens=* USEBACKQ" %F IN (`java -jar %MAVEN_HOME%jenkins-cli.jar -s http://someip.com build /dev/ -s  --username **** --password ***`) DO (SET var=%F)

因为语法是

C:>for /?
Runs a specified command for each file in a set of files.
FOR %variable IN (set) DO command [command-parameters]
%variable  Specifies a single letter replaceable parameter.
(set)      Specifies a set of one or more files.  Wildcards may be used.
command    Specifies the command to carry out for each file.
command-parameters
Specifies parameters or switches for the specified command.
To use the FOR command in a batch program, specify %%variable instead
of %variable.  Variable names are case sensitive, so %i is different
from %I.
...
FOR /F ["options"] %variable IN (file-set) DO command [command-parameters]
FOR /F ["options"] %variable IN ("string") DO command [command-parameters]
FOR /F ["options"] %variable IN ('command') DO command [command-parameters]
or, if usebackq option present:
FOR /F ["options"] %variable IN (file-set) DO command [command-parameters]
FOR /F ["options"] %variable IN ('string') DO command [command-parameters]
FOR /F ["options"] %variable IN (`command`) DO command [command-parameters]

如您所见，您有USEBACKQ命令必须用反引号包围，并且它还说如果要在批处理文件中使用for命令，则必须将百分比加倍