RegEx替换前缀和后缀

Question

我想构建一个RegEx表达式来替换字符串的前缀和后缀。一般字符串是从

构建的

1. 已知前缀字符串
2. 某些字母a-z或A-Z
3. 一些带有字母，连字符，反斜杠，斜线和数字的未知字符串。
4. 连字符
5. 整数
6. 符号＃。
7. 一些字母串

示例：

KnownStringr/df-2e\d-3724#.Gkjsu
KnownStringEd\e4v-bn-824#.YKfg
KnownStringa-YK224E\yy-379924#.awws

我想替换NUMBER的前缀和后缀，以便我得到：

MyPrefix3724MyPostfix
MyPrefix824MyPostfix
MyPrefix379924MyPostfix

Answer 1

这个正则表达式应该可以解决问题，但是你总是应该指定你正在使用的语言/框架，因为并非所有正则表达式引擎都支持相同的功能。

您要捕获的数字将位于捕获组＃3（(\d+)）中，大多数语言都将其引用为\ 3

(?:KnownString)([a-zA-Z])(.*?)-(\d+)\#\.[a-zA-Z]+

说明：

 (?:                     # Opens NCG
     KnownString         # Literal KnownString
 )                       # Closes NCG
 (                       # Opens CG1
     [a-zA-Z]            # Character class (any of the characters within)
                           # Anything between a and z
                           # Anything between A and Z
 )                       # Closes CG1
 (                       # Opens CG2
     .*?                 # . denotes any single character, except for newline
                           # * repeats zero or more times
                           # ? as few times as possible
 )-                      # Closes CG2
                           # Literal -
 (                       # Opens CG3
     \d+                 # Token: \d (digit)
                           # + repeats one or more times
 )                       # Closes CG3
 \#                      # Literal #
 \.                      # Literal .
 [a-zA-Z]+               # Character class (any of the characters within)
                           # Anything between a and z
                           # Anything between A and Z
                           # + repeats one or more times

您还没有指定已知前缀的内容，您应该小心转义已知字符串中的特殊字符，尤其是句点，加号，星号，问号和括号。