How to use Chinese matching of regular expressions

This article mainly introduces how to use regular expression Chinese matching, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, let the editor take you to understand it.

\ w matches only Chinese, numbers and letters. For Chinese people, only matching Chinese is often used, see below

Regular expressions that match Chinese characters: [\ u4e00 -\ u9fa5]

Maybe you also need to match double-byte characters. Chinese is also double-byte characters.

Match double-byte characters (including Chinese characters): [^\ X00 -\ xff]

Note: it can be used to calculate the length of a string (a double-byte character length meter 2recom ASCII character counter 1)

More common regular expression matching rules:

English letter: [a-zA-Z]

Number: [0-9]

Match Chinese, English letters and numbers and _:

/ / code from http://caibaojian.com/zhongwen-regexp.html

^ [\ u4e00 -\ u9fa5_a-zA-Z0-9] + $

At the same time, determine the input length:

[\ u4e00 -\ u9fa5_a-zA-Z0-9 _] {4jue 10}

^ [\ w\ u4E00 -\ u9FA5\ uF900-\ uFA2D] * $

1. A regular expression that contains only Chinese characters, numbers, letters, and underscores cannot begin and end with an underscore:

^ (! _) (?!. *? _ $) [a-zA-Z0-9 _\ u4e00 -\ u9fa5] + $

Where:

^ matches the beginning of the string

(? _) cannot start with _

(?. *? _ $) cannot end with _

[a-zA-Z0-9 _\ u4e00 -\ u9fa5] + at least one Chinese character, number, letter, underscore

$matches the end of the string

Add @ before the program, otherwise you need to escape @ "^ (?! _) (?!. *? _ $) [a-zA-Z0-9 _ u4e00 -\ u9fa5] + $"

(or: @ "^ (?! _)\ w * (?