在将ECHO输出重定向到文件时，如何避免在文本文件中写入尾随空格？ [英] How to avoid writing trailing spaces into text file on redirecting ECHO outputs to a file?

问题描述

我有这个代码：

@echo off
color 0a
title FTP
CLS
echo username > FTP.txt
echo password >> FTP.txt
ftp -s:FTP.txt ftp.website.com

但是我出现问题，因为在文本文件的用户名和密码上附加了空格，所以在执行身份验证时显示错误。换句话说， FTP.txt 的第一行是 用户名，而不是 用户名。另外第二行是 密码 c，而不是 密码。

But I have the problem that it shows an error in authentication on execution because a space is appended on username and password in text file. It other words first line of FTP.txt is "username " and not "username". Also second line is "password " and not "password".

如何删除每行末尾的空格或避免将其写入文件中？

How to delete those spaces at end of each line or avoid writing them into the file?

推荐答案

如Stephan所述上方，用户名和密码之后的空格被视为文字空间，而不是令牌分隔符。删除> 重定向器之前的空格。

As Stephan comments above, the space after username and password is being treated as a literal space, not a token separator. Remove the spaces before the > redirectors.

echo username>FTP.txt
echo password>>FTP.txt

如果您觉得很尴尬，也可以将重定向放在行的开头并达到相同的效果。

If that seems awkward to you, you can also put the redirection at the beginning of the line and achieve the same effect.

>FTP.txt echo username
>>FTP.txt echo password

区别纯粹是装饰性的。或者，您只能打开一次FTP.txt进行写入，但是在关闭之前使用多个语句进行写入。

The difference is purely cosmetic. Or you can open FTP.txt only once for writing, but use multiple statements to write before closing. This is actually a bit more efficient.

>FTP.txt (
    echo username
    echo password
)

或

(
    echo username
    echo password
) >FTP.txt

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