Regex删除了额外的空格和换行符,但不是所有的[duplicate]

这将匹配额外的空格和新行:

(?<= ) | +$|(?<=\n)\n

(?<=[space])[space] | Match any space that has a preceding space
|                   | or
[space]+$           | Match one or more consecutive spaces at the end of a line
|                   | or
(?<=\n)\n           | Match any new line that has a preceding new line

Try it here