匹配各种数字

[a-b] 其中 a 和 b 是 0 到 9 范围内的数字

[3-7] will match a single digit in the range 3 to 7.

匹配多个数字

\d\d       will match 2 consecutive digits
\d+        will match 1 or more consecutive digits
\d*        will match 0 or more consecutive digits
\d{3}      will match 3 consecutive digits
\d{3,6}    will match 3 to 6 consecutive digits
\d{3,}     will match 3 or more consecutive digits

以上示例中的\d 可以替换为数字范围：

[3-7][3-7]    will match 2 consecutive digits that are in the range 3 to 7
[3-7]+        will match 1 or more consecutive digits that are in the range 3 to 7
[3-7]*        will match 0 or more consecutive digits that are in the range 3 to 7
[3-7]{3}      will match 3 consecutive digits that are in the range 3 to 7
[3-7]{3,6}    will match 3 to 6 consecutive digits that are in the range 3 to 7
[3-7]{3,}     will match 3 or more consecutive digits that are in the range 3 to 7

你还可以选择特定的数字：

[13579]       will only match "odd" digits
[02468]       will only match "even" digits
1|3|5|7|9     another way of matching "odd" digits - the | symbol means OR

匹配包含多个数字的范围中的数字：

\d|10        matches 0 to 10    single digit OR 10.  The | symbol means OR
[1-9]|10     matches 1 to 10    digit in range 1 to 9 OR 10
[1-9]|1[0-5] matches 1 to 15    digit in range 1 to 9 OR 1 followed by digit 1 to 5
\d{1,2}|100  matches 0 to 100   one to two digits OR 100

匹配除以其他数字的数字：

\d*0         matches any number that divides by 10  - any number ending in 0
\d*00        matches any number that divides by 100 - any number ending in 00
\d*[05]      matches any number that divides by 5   - any number ending in 0 or 5
\d*[02468]   matches any number that divides by 2   - any number ending in 0,2,4,6 or 8

匹配的数字除以 4 - 任何数字为 0,4 或 8 或结束于 00,04,08,12,16,20,24,28,32,36,40,44,48,52,56,60，64,68,72,76,80,84,88,92 或 96

[048]|\d*(00|04|08|12|16|20|24|28|32|36|40|44|48|52|56|60|64|68|72|76|80|84|88|92|96)

这可以缩短。例如，我们可以使用 2[048] 代替 20|24|28。此外，由于 40 年代，60 年代和 80 年代具有相同的模式，我们可以包括它们：[02468][048] 和其他的模式太 [13579][26]。所以整个序列可以减少到：

[048]|\d*([02468][048]|[13579][26])    - numbers divisible by 4

匹配的数字不具有可被 2,4,5,10 等整除的模式，但不能总是简洁地完成，你通常不得不求助于一系列数字。例如，通过列出所有这些数字，可以简单地匹配在 1 到 50 范围内除以 7 的所有数字：

7|14|21|28|35|42|49

or you could do it this way

7|14|2[18]|35|4[29]