在包含不同字符（例如“”）的文件中写入整个cmd命令。或“ >>" [英] Writing a whole cmd command in a file that contains different characters,such as ">" or " >>"

问题描述

我想将此代码写入文件名为final.txt的文件中：

I want to write this code in a file with file name final.txt:

 @echo off dir file1.txt > file2.txt 

我已经尝试过这样的事情：

I've tried something like this :

"@echo off dir file1.txt > file2.txt" 

但是它只写

"@echo off dir file1.txt > "

它不会复制整个命令，也将复制反逗号。

It doesn't copy the whole command and the inverted commas are copied too.

推荐答案

某些字符具有特殊含义，会被执行而不是回显。 > 是其中之一。要回显它们，必须转义它们（使用另一个特殊字符，即插入号 ^ ）。另外，要在一行中执行两个命令，还必须用& （其中的另一个特殊字符）将它们分开。最后，要执行最终文件，其扩展名必须为 .bat 或 .cmd 。并且您需要另一个 echo 来回显 @echo ... ：

Some chars have a special meaning and gets executed instead of echoed. > is one of them. to echo them, you must "escape" them (with another special char, the caret ^). Also to execute two commands in one line, you have to separate them with & (another one of those special chars). And last not least, to be able to execute the final file, it's extension has to be .bat or .cmd. And you need another echo to echo the @echo ...:

echo @echo off & dir file1.txt ^> file2.txt > final.bat

但是 final.bat 如果您将每一行写在自己的行上，则可读性更好：

But final.bat would be better readable, if you write every line on its own line:

echo @echo off>final.txt
echo dir file1.txt ^>file2.txt >>final.bat

（>> 用于附加到文件而不是覆盖文件）

(>> is used to append to a file instead of overwriting it)

仅提及： echo 不是唯一可以通过 @ 静默的命令。具有相同效果的较短代码：

just to mention: echo is not the only command that can be quieted with @. Shorter code with same effect:

echo @dir file1.txt^>file2.txt>>final.bat

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