windows 批处理文件中的“%1”和“%2”是什么？
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What are "%1" and "%2" in batch files?
提问by Ricky
What does the following %1means (in a .bat file)?
以下%1是什么意思（在 .bat 文件中）？
jsmin <%1 >%2
回答by Mehrdad Afshari
It represents the first command line argument passed to the batch file.
它代表传递给批处理文件的第一个命令行参数。
If you run your batch file with:
如果您使用以下命令运行批处理文件：
myfile.bat firstArg secondArg
%1becomes "firstArg" and %2becomes "secondArg"
%1变为“firstArg”并%2变为“secondArg”
The related shiftcommand shifts the position of arguments one to the left. Running shiftonce in a batch file will make "%1" value to be the second argument, "%2" becomes the third, and so on. It's useful for processing command line arguments in a loop in the batch file.
相关shift命令将参数的位置向左移动一位。shift在批处理文件中运行一次将使“%1”值成为第二个参数，“%2”成为第三个，依此类推。它对于在批处理文件的循环中处理命令行参数很有用。
回答by Tatu Ulmanen
%1is the first argument given, %2the second.
%1是给出的第一个参数，%2第二个。
If you run the file with foo.bat source.js destination.js, the command run is jsmin <source.js >destination.js.
如果使用 运行该文件foo.bat source.js destination.js，则运行命令为jsmin <source.js >destination.js.
