java pattern compile regex

Question

String HTML = some HTML source code that contains String a,b

String a = "<a class="cit-dark-link" href="http://scholar.google.ca/scholar?oi=bibs&hl=en&cites=6912391300348162186">88</a>"

String b = "<a class="cit-dark-link" href="http://scholar.google.ca/scholar?oi=bibs&hl=en&cites=18217435431424551679">41</a>"

String ex = ?

Pattern patternObject = Pattern.compile(ex);
Matcher matcherObject = patternObject.matcher(HTML);

while (matcherObject.find()) {
        System.out.println("DEBUG: Cite is " + matcherObject.group(1));
  }

Hi, I am new to JAVA and Regex and I am wondering how can I write the String ex so that it only prints. (I hope I am clear enough)

Cite is 88

Cite is 41

Use a proper HTML parser to do this: load the input string, find `` tag with the given class, print its node value. Done. — Amal Murali, Aug 10 '14 at 13:19
Thanks for the answer. How can I do it without a HTML parser package? — user116064, Aug 10 '14 at 13:37
How can you do it with an HTML parser? Unwisely. http://stackoverflow.com/questions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags/1732454#1732454 — james.garriss, Jun 24 '15 at 15:46

MeowMeow · Answer 1 · 2014-08-10T13:58:07.483

0

String ex = ".*>([1-9]+)<.*";

If you only want the digits, you can ignore everything else. I don't know how you apply URL to HTML, but this test is for one URL from user input.

public static void main(String[] args) throws IOException {
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    String HTML = in.readLine();
    URL a = new URL (HTML);

    String ex = ".*>([1-9]+)<.*";

    Pattern patternObject = Pattern.compile(ex);
    Matcher matcherObject = patternObject.matcher(a.toString());

    while (matcherObject.find()) {
            System.out.println("DEBUG: Cite is " + matcherObject.group(1));
      }
}

edited Aug 10 '14 at 13:58

answered Aug 10 '14 at 13:36

MeowMeow

622
1
8
15

How do i ignore the 6912391300348162186? Because there can be different string with different digits. – user116064 Aug 10 '14 at 13:40
.*> should ignore everything prior to the group right after the >, I'll update my answer with the test code. – MeowMeow Aug 10 '14 at 13:42

score 0 · Accepted Answer · answered Aug 10 '14 at 13:45

You can try this :

Pattern patternObject = Pattern.compile("<a class=\"cit-dark-link(.*?)cites=(\\d)+\">(.*?)</a>");
            Matcher matcherObject = patternObject.matcher(HTML);

            while (matcherObject.find()) {
                    System.out.println("DEBUG: Cite is " + matcherObject.group(3));
              }

This prints :

DEBUG: Cite is 88
DEBUG: Cite is 41

java pattern compile regex

2 Answers2