简单的Java正则表达式从封装字符串中提取IP地址和端口 [英] Simple Java regex to extract IP address and port from enclosing string

问题描述

考虑一对IPv4或IPv6地址和端口，由/或:分隔，例如

Consider a pair of IPv4 or IPv6 address and port, separated by either / or :, e.g.

10.10.10.10:1234

端口是可选的，因此像这样的字符串

The port is optional, so strings like

10.10.10.10/
10.10.10.10:
10.10.10.10

也是有效的.地址/端口对后面可以跟空格或逗号，它是更长的封闭字符串的一部分.

are also valid. The address/port pair may be followed by space or comma characters and it is part of a much longer enclosing string.

从封闭的字符串(不使用String操作函数)中提取单独字段中的2个值的非常简单的正则表达式是什么?

What would be a very simple regex to extract the 2 values in separate fields from the enclosing string (without using String manipulation functions)?

例如，类似

(?<address>[^\s,]+[^\s,:\.])((/|:)(?<port>\d*))?

在同一字符串中提取地址和端口.

extracts both address and port in the same string.

这里的目标是即使不是100％准确(即即使它也匹配其他字符串)，也要使用最简单的正则表达式来实现提取.

The goal here is to achieve extraction with the simplest possible regex, even if it is not 100% accurate (i.e., even if it matches other strings as well).

推荐答案

([0-9.]*)(\/|:)([0-9]*)

这是正则表达式.第一组给您IP.第三组为您提供端口号.中间组给出分隔符，即/或:用于交替.可以忽略.

Here is the regex . First group gives you IP. Third group gives you the Port number. Middle group gives separator i.e / or : used for alternation. It can be ignored.

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