从字符串中提取url

Question

我知道这个问题多次重复，但我找不到合适的答案。

如果我有一串网址，例如：

＆＃34; www.google.comwww.yahoo.comwww.ebay.com＆＃34; （假设链接之间没有空格）

我想单独提取每个并将它们放在数组中。我尝试使用正则表达式：

    String[] sp= parts.split("\\www");
    System.out.println(parts[0]);

这没有用！任何提示都表示赞赏

Answer 1

Regex

(www\.((?!www\.).)*)

Debuggex Demo

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描述

选项：不区分大小写

Match the regular expression below and capture its match into backreference number 1 «(www\.((?!www\.).)*)»
    Match the characters “www” literally «www»
    Match the character “.” literally «\.»
    Match the regular expression below and capture its match into backreference number 2 «((?!www\.).)*»
        Between zero and unlimited times, as many times as possible, giving back as needed (greedy) «*»
        Note: You repeated the capturing group itself.  The group will capture only the last iteration.  Put a capturing group around the repeated group to capture all iterations. «*»
        Assert that it is impossible to match the regex below starting at this position (negative lookahead) «(?!www\.)»
        Match the characters “www” literally «www»
        Match the character “.” literally «\.»
    Match any single character that is not a line break character «.»

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爪哇

try {
    String subjectString = "www.google.comwww.yahoo.comwww.ebay.com";
    String[] splitArray = subjectString.split("(?i)(www\\.((?!www\\.).)*)");
} catch (PatternSyntaxException ex) {
    // Syntax error in the regular expression
}

Answer 2

你也可以使用基本的字符串方法将comwww分解为com www，然后简单地拆分空格：

    String urlString = "www.google.comwww.yahoo.comwww.ebay.com";
    String[] urlArray = urlString.replaceAll(".comwww.", ".com www.").split(" ");
    System.out.println(Arrays.toString(urlArray)); // [www.google.com, www.yahoo.com, www.ebay.com]