正则表达式大全.pdf资源-CSDN文库

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正则表达式大全

(regular expression)

关键字：正则表达式，Regular Expression

前言

正则表达式是烦琐的，但是强大的，学会之后的应用会让你除了提高效率外，

会给你带来绝对的成就感。只要认真去阅读这些资料，加上应用的时候进行一定

的参考，掌握正则表达式不是问题。

索引

1. 引子 ....................................................................................................................................................3

2. 正则表达式的历史 ............................................................................................................................3

３

正则表达式定义

......................................................................................................................................... 3

3.1 普通字符 ...........................................................................................................................................4

3.2 非打印字符 .......................................................................................................................................4

3.3 特殊字符 ...........................................................................................................................................4

3.4 限定符 ...............................................................................................................................................5

3.5 定位符 ...............................................................................................................................................6

3.6 选择 ...................................................................................................................................................6

3.7 后向引用 ...........................................................................................................................................6

各种操作符的运算优先级

........................................................................................................................... 6

全部符号解释

............................................................................................................................................... 6

部分例子

....................................................................................................................................................... 9

正则表达式匹配规则

................................................................................................................................. 10

7.1 基本模式匹配 .................................................................................................................................10

7.2 字符簇 .............................................................................................................................................11

7.3 确定重复出现 .................................................................................................................................13