正则表达式学习

发布时间：2020-12-13 22:38:23 所属栏目：百科来源：网络整理

导读：例子邮箱 S+@S+.S+ 中文 [u4e00-u9fa5] 双字节字符 [^x00-xff] 空白行 ns*r URL [a-zA-z]+://[^s]* 电话号码 d{3}-d{8}|d{4}-{7,8} QQ号 [1-9][0-9]{4,} 邮政编码 [1-9]d{5}(?!d) 身份证号码 ^(d{6})(d{4})(d{2})(d{2})(d{3})([0-9]

例子

邮箱
```
S+@S+.S+
```
中文
```
[u4e00-u9fa5]
```
双字节字符
```
[^x00-xff]
```
空白行
```
ns*r
```
URL
```
[a-zA-z]+://[^s]*
```
电话号码
```
d{3}-d{8}|d{4}-{7,8}
```
QQ号
```
[1-9][0-9]{4,}
```
邮政编码
```
[1-9]d{5}(?!d)
```

身份证号码

^(d{6})(d{4})(d{2})(d{2})(d{3})([0-9]|X)$

语法说明：

`[abc]`	A single character of: a,b,or c
`[^abc]`	Any single character except: a,or c
`[a-z]`	Any single character in the range a-z
`[a-zA-Z]`	Any single character in the range a-z or A-Z
`^`	Start of line
`$`	End of line
`A`	Start of string
`z`	End of string

`.`	Any single character
`s`	Any whitespace character
`S`	Any non-whitespace character
`d`	Any digit
`D`	Any non-digit
`w`	Any word character (letter,number,underscore)
`W`	Any non-word character
`b`	Any word boundary

`(...)`	Capture everything enclosed
`(a\|b)`	a or b
`a?`	Zero or one of a
`a*`	Zero or more of a
`a+`	One or more of a
`a{3}`	Exactly 3 of a
`a{3,}`	3 or more of a
`a{3,6}`	Between 3 and 6 of a

options:i case insensitivem make dot match newlinesx ignore whitespace in regexo perform #{...} substitutions only once

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