正则表达式 [:graph:] 含义

[:graph:]

代表printable and visible的字符,是除空格符(空格键与[TAB]键)之外的所有按键,

控制字符不算[:graph:]

https://www.regular-expressions.info/posixbrackets.html

POSIX	Description	ASCII	Unicode	Shorthand	Java
[:alnum:]	Alphanumeric characters	[a-zA-Z0-9]	[p{L&}p{Nd}]		p{Alnum}
[:alpha:]	Alphabetic characters	[a-zA-Z]	p{L&}		p{Alpha}
[:ascii:]	ASCII characters	[x00-x7F]	p{InBasicLatin}		p{ASCII}
[:blank:]	Space and tab	[ ]	[p{Zs} ]	h	p{Blank}
[:cntrl:]	Control characters	[x00-x1Fx7F]	p{Cc}		p{Cntrl}
[:digit:]	Digits	[0-9]	p{Nd}	d	p{Digit}
[:graph:]	Visible characters (i.e. anything except spaces, control characters, etc.)	[x21-x7E]	[^p{Z}p{C}]		p{Graph}
[:lower:]	Lowercase letters	[a-z]	p{Ll}		p{Lower}
[:print:]	Visible characters and spaces (i.e. anything except control characters, etc.)	[x20-x7E]	P{C}		p{Print}
[:punct:]	Punctuation and symbols.	[!"#$%&'()*+,  -./:;<=>?@  [\]^_`{|}~]	[p{P}p{S}]		p{Punct}
[:space:]	All whitespace characters, including line breaks	[ vf]	[p{Z} vf]	s	p{Space}
[:upper:]	Uppercase letters	[A-Z]	p{Lu}		p{Upper}
[:word:]	Word characters (letters, numbers and underscores)	[A-Za-z0-9_]	[p{L}p{N}p{Pc}]	w
[:xdigit:]	Hexadecimal digits	[A-Fa-f0-9]	[A-Fa-f0-9]		p{XDigit}