windows 是否可以在批处理文件的回显行中放置换行符？
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Is it possible to put a new line character in an echo line in a batch file?
提问by Benj
Is it possible to put a new line character in an echo line in a batch file?
是否可以在批处理文件的回显行中放置换行符？
Basically I want to be able to do the equivalent of:
基本上我希望能够做相当于：
echo Hello\nWorld
You can do this easily enough in Linux, but I can't work out how to do it in Windows.
在 Linux 中你可以很容易地做到这一点，但我不知道如何在 Windows 中做到这一点。
回答by Blind Trevor
echo.prints an empty line.
echo.打印一个空行。
Example:
例子：
echo Hello
echo.
echo world
prints
印刷
Hello
world
回答by jeb
It can be solved with a single echo.
它可以通过单个回声解决。
You need a newline character \nfor this.
There are multiple ways to get a new line into the echo
\n为此，您需要一个换行符。有多种方法可以让新行进入echo
1) This sample use the multiline caret to add a newline into the command,
the empty line is required
1) 本示例使用多行插入符在命令中添加换行符，
需要空行
echo Hello^
world
2) The next solution creates first a variable which contains one single line feed character.
2) 下一个解决方案首先创建一个包含一个换行符的变量。
set \n=^
rem ** Two empty lines are required
Or create the new line with a slightly modified version
或者使用稍微修改的版本创建新行
(set \n=^
%=DONT REMOVE THIS=%
)
And use this character with delayed expansion
并使用此字符延迟扩展
setlocal EnableDelayedExpansion
echo Hello!\n!world
To use a line feed character with the percent expansionyou need to create a more complex sequence
要使用带有百分比扩展的换行符，您需要创建一个更复杂的序列
echo Hello^%\n%%\n%world
Or you can use the New line hack
或者你可以使用New line hack
REM Creating a Newline variable (the two blank lines are required!)
set \n=^
set NL=^^^%\n%%\n%^%\n%%\n%
REM Example Usage:
echo There should be a newline%NL%inserted here.
But only the delayed expansion of the newline works reliable, also inside of quotes.
但只有换行符的延迟扩展才可靠，也在引号内。
回答by Clifford
After a little experimentation I discovered that it is possible to do it without issuing two separate echo commands as described in How can you echo a newline in batch files?. However to make it work you will need a text editor that does not translate CR to CR+LF.
经过一些实验后，我发现可以在不发出两个单独的 echo 命令的情况下执行此操作，如如何在批处理文件中回显换行符中所述？. 但是，要使其工作，您将需要一个不会将 CR 转换为 CR+LF 的文本编辑器。
Type:
类型：
@echo First Line
then with NumLock on, hold down the ALT key and type 10 on the numeric keypad before releasing ALT (you mustuse the numeric keypad, not the top-row number keys). This will insert a CR character. Then type the second line. Depending on your editor and how it handles CR compared with CR+LF you may get:
然后在 NumLock 打开的情况下，按住 ALT 键并在释放 ALT 之前在数字小键盘上键入 10（您必须使用数字小键盘，而不是顶行数字键）。这将插入一个 CR 字符。然后输入第二行。根据您的编辑器以及它如何处理 CR 与 CR+LF 相比，您可能会得到：
@echo First Line?Second Line
or
或者
@echo First Line
Second Line
This works from the command line and will work in a batch file so long as the text editor does not translate CR to CR+LF (which Windows/DOS editors do unless you configure them not to). If the CR is converted to CR+LF, or if you use just LF, the second line is interpreted as a new command.
只要文本编辑器不将 CR 转换为 CR+LF（Windows/DOS 编辑器会这样做，除非您将它们配置为不这样做），这可以从命令行运行，并且可以在批处理文件中运行。如果 CR 转换为 CR+LF，或者如果您只使用 LF，则第二行将被解释为新命令。
However, I cannot see why this would be preferable over simply:
但是，我不明白为什么这比简单地更可取：
@echo First Line
@echo Second Line
回答by Benj
Ahaha,
啊哈哈，
I think I've worked out something close enough...
我想我已经找到了足够接近的东西......
echo hello&echo.&echo world
Produces:
产生：
hello
你好
world
世界
回答by Reu Roo
echo.or echo(
回声。或 回声（
will do the blank new line. Hope this is helpful.
将做空白的新行。希望这是有帮助的。
回答by Wiretap
I found this very informative, so wanted to post a better example using the answers provided
我发现这非常有用，因此想使用提供的答案发布更好的示例
This provides a nicely formatted usage message
这提供了格式良好的使用消息
if "%1" == """" goto usage
:usage
echo USAGE: %0 [Set properties using -D flag] [Ant Task to Run] &
echo. &
echo Availble Command line properties &
echo -------------------------------- &
...
回答by martin
I think it is not possible. You could only try an ascii-character to this: http://www.asciitable.com/But this will perhaps crash your batch-file.
我认为这是不可能的。您只能尝试使用 ascii 字符：http: //www.asciitable.com/但这可能会使您的批处理文件崩溃。
