\ n和\ r似乎无处不在.为什么line.separator更可移植? [英] \n and \r seem to work everywhere. Why is line.separator more portable?
问题描述
我只是仔细阅读问题，发现作者使用System.getProperty(line.separator)代替\n并认为代码是可移植的".通过各种论坛阅读，我看到了两个小组:
I was just perusing through questions, and I found System.getProperty(line.separator) used in place of \n with the author's comment that the code was "portable". Reading through various forums, I've seen two groups:
- 人们说Linux和Windows对换行符的解释有所不同，这弥补了这一点(没有明确的证据).
- 人们说通过显示代码和输出示例没有什么区别，这显然仅适用于该代码示例，而不是通用的.
我的感觉是:它可能是非标准的OS，例如您公司的工业扫描仪的OS，您会注意到其中的不同.什么时候可以看到\n和line.separator之间的区别?你能举个例子吗?您如何发现变化发生的地方?
My feeling is: it's probably non-standard OS's, like for example your company's industrial scanner's OS for example, where you'll notice a difference. When am I going to see a difference between \n and line.separator? Can you show an example, please? How did you go about discovering where the variation occurs?
推荐答案
不正确的行尾经常引起麻烦.例如，这是Windows记事本在使用\n而不是\r\n(Windows的line.separator)写入文件时显示的内容:
Incorrect line endings are a frequent annoyance. For example, this is what Windows Notepad shows when writing a file with \n instead of \r\n (Windows' line.separator):
那些小盒子应该是换行符.
Those little boxes were supposed to be line breaks.
相反，当使用\r\n代替\n(Unix的line.separator)时，情况更糟，并且以怪异而奇妙的方式破坏了shell脚本和配置文件.
The other way around, when \r\n is used in place of \n (Unix' line.separator), is way worse, and breaks shell scripts and config files in weird and wonderful ways.
例如，这是sh在Debian和派生发行版上输出的内容，当尝试运行仅包含ls但带有\r\n行分隔符的shell脚本时(它看起来很浪费，因为回车会导致终端覆盖该行的一部分):
For example, this is what sh outputs on Debian and derived distros when trying to run a shell script that just contains ls but with \r\n line separators (it looks trashed because the carriage return causes the terminal to overwrite parts of the line):
: not foundsh: ls
每天都有一些关于StackOverflow的问题，这些问题被人们所咬，例如此处，此处和
There are several questions per day on StackOverflow from people being bitten by this, such as here, here and here.
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