在批处理文件中存储命令的返回值 [英] Storing return value of a command in batch file

问题描述

我正在创建一个批处理文件，我想在其中存储以下命令(在Windows中)返回的值:

I am creating a batch file, in which I want to store the value returned by the following command (in Windows):

netstat -an | find ":port" /c

如何存储计数值并使用回显进行打印?

How to store the count value and print using echo?

推荐答案

要捕获命令的输出，可以使用for /F命令.要将其存储到变量中，请在for循环的正文中使用set:

To capture the output of a command, you can use the for /F command; to store it into a variable, use set in the body of the for loop:

for /F "delims=" %L in ('netstat -an ^| find ":port" /c') do (set "VAR=%L")

注意逸出的管道^|.要在批处理文件中使用此文件，请将%L替换为%%L.

Note the escaped pipe ^|. To use this within a batch file, replace %L by %%L.

这仅适用于单行输出.如果命令返回多行输出，则仅最后一行存储在变量VAR中.

This only works for a single-line output. If a command returns a multi-line output, only the last line is stored in variable VAR.

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