windows 如何将输出重定向到名称为当前日期和时间的文件？
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How to redirect output to a file which name is the current date and time?
提问by Misha Moroshko
I would like to redirect the output of a command (in the Windows command line) to a file which name is the current date and time. For example:
我想将命令的输出（在 Windows 命令行中）重定向到名称为当前日期和时间的文件。例如：
my_path\mysqldump.exe my_database_name > auto_generated_file_name
where auto_generated_file_nameshould be something like 2010_09_30___11_41_58.txt.
哪里auto_generated_file_name应该是这样的2010_09_30___11_41_58.txt。
This command will automatically run from time to time. This is the reason I need the file name to be automaticallygenerated.
此命令将不时自动运行。这就是我需要自动生成文件名的原因。
What is the easiest method to achieve this ?
实现这一目标的最简单方法是什么？
采纳答案by ars
The following command creates a blank file with the expected filename:
以下命令创建一个具有预期文件名的空白文件：
> type nul > %date:~10,4%_%date:~4,2%_%date:~7,2%__%time:~0,2%_%time:~3,2%_%time:~6,2%.txt
> dir /b
2010_09_29__22_12_44.txt
You can use the part after type nul >in place of your auto_generated_file_name.
您可以type nul >在代替您的auto_generated_file_name.
回答by Seth
There's a nice solution here, and it almost matches your example formatting:
这里有一个很好的解决方案，它几乎与您的示例格式相匹配：
set dd = %date% %Time%
my_command > MyFile__%dd:~0,2%_%dd:~3,2%_%dd:~6,4%___%dd:~11,2%_%dd:~14,2%.txt
Output: "MyFile__22_05_2009__6_20.txt"
输出：“我的文件__22_05_2009__6_20.txt”
