用于 URL 的 Java 正则表达式答案

【问题标题】：Java regex for URL用于 URL 的 Java 正则表达式
【发布时间】：2015-12-13 08:13:00
【问题描述】：

我需要一个正则表达式，它将匹配下一个 url：

(http|https)://(www)<my domain here>
(http|https)://(www)<my domain here>/page1
(http|https)://(www)<my domain here>/page1/.../
(http|https)://(www)<my domain here>/page1/...?a=b
(http|https)://(www)<my domain here>/page1/...?a=b&c=d...

我有一个正则表达式，但我不知道如何编辑它

^(http:\/\/|https:\/\/)?(www.)?([a-zA-Z0-9]+).[a-zA-Z0-9]*.[a-z]{3}.?([a-z]+)?$

【问题讨论】：

标签： java regex url

【解决方案1】：

您可以使用以下内容：

^(http:\/\/|https:\/\/)?(www.)?([a-zA-Z0-9]+).[a-zA-Z0-9]*.[a-z]{3}.?([a-z]+)?(\/[a-z0-9])*(\/?|(\?[a-z0-9]=[a-z0-9](&[a-z0-9]=[a-z0-9]*)?))$

对于特定的域名：

^(http:\/\/|https:\/\/)?(www.)?example\.com(\/?|(\?[a-z0-9]=[a-z0-9](&[a-z0-9]=[a-z0-9]*)?))$

编辑：验证域并获取 URL：

(http:\/\/|https:\/\/)?(www.)?example\.com\S*

【讨论】：

你不明白我的意思，我只想获取具有特定域名的网址，例如：example.org... 我应该在你的正则表达式中将“example.org”放在哪里？
@Sevak.Avet 更新了答案。我以为你想要验证 /page1/...?a=b.. 等。：P
我的意思是，我想获取特定域的完整 URL :) 我只想验证域，但获取完整 URL

【解决方案2】：

试试这个：

^https?://[^/@]*\.domain\.com(/.*)?$

【讨论】：

【解决方案3】：

试试这个：

^(http|https):\/\/(www).([a-z\.]*)?(\/[a-z1-9\/]*)*\??([\&a-z1-9=]*)?

我在网站Regular expressions 101得到的解释。

/^(http|https):\/\/(www).([a-z\.]*)?(\/[a-z1-9\/]*)*\??([\&a-z1-9=]*)?/
    ^ assert position at start of the string
    1st Capturing group (http|https)
        1st Alternative: http
            http matches the characters http literally (case sensitive)
        2nd Alternative: https
            https matches the characters https literally (case sensitive)
    : matches the character : literally
    \/ matches the character / literally
    \/ matches the character / literally
    2nd Capturing group (www)
        www matches the characters www literally (case sensitive)
    . matches any character (except newline)
    3rd Capturing group ([a-z\.]*)?
        Quantifier: ? Between zero and one time, as many times as possible, giving back as needed [greedy]
        [a-z\.]* match a single character present in the list below
        Quantifier: * Between zero and unlimited times, as many times as possible, giving back as needed [greedy]
        a-z a single character in the range between a and z (case sensitive)
        \. matches the character . literally
    4th Capturing group (\/[a-z1-9\/]*)*
        Quantifier: * Between zero and unlimited times, as many times as possible, giving back as needed [greedy]
       \/ matches the character / literally
        [a-z1-9\/]* match a single character present in the list below
            Quantifier: * Between zero and unlimited times, as many times as possible, giving back as needed [greedy]
            a-z a single character in the range between a and z (case sensitive)
            1-9 a single character in the range between 1 and 9
            \/ matches the character / literally
    \?? matches the character ? literally
        Quantifier: ? Between zero and one time, as many times as possible, giving back as needed [greedy]
    5th Capturing group ([\&a-z1-9=]*)?
        Quantifier: ? Between zero and one time, as many times as possible, giving back as needed [greedy]
       [\&a-z1-9=]* match a single character present in the list below
            Quantifier: * Between zero and unlimited times, as many times as possible, giving back as needed [greedy]
            \& matches the character & literally
            a-z a single character in the range between a and z (case sensitive)
            1-9 a single character in the range between 1 and 9
            = the literal character =

【讨论】：