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Extract content between two tags in HTML document

Posted on 2005-03-27
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Last Modified: 2012-08-14
Hi.

I have an HTML document, contained in a String (using this code: http://www.javaalmanac.com/egs/javax.swing.text.html/GetText.html).

Now, I would like to extract the String between the <title> tag, and the </title> tag.

(The title tags will *always* be in this document).

Any example code for this? Should I just use StringTokenizer, setting the delimiter to "<title>", then in the second token, run the StringTokenizer class again, to extract the first token, when the delimiter is "</title>" ??

That's the best idea that I can come up with.

Thanks in advance,
>> IM
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Question by:InteractiveMind
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3 Comments
 
LVL 7

Accepted Solution

by:
lhankins earned 2000 total points
ID: 13640311
Here's a working example :

      String someHtml =
              "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n" +
              "<html>\n" +
              "<head>\n" +
              "<title>this is my title</title>\n" +
              "\n" +
              "<style type=\"text/css\">\n" +
              "</style>\n" +
              "\n" +
              "<script type=\"text/javascript\">\n" +
              "</script>\n" +
              "\n" +
              "\n" +
              "</head>\n" +
              "\n" +
              "<body>\n" +
              "   <div>bleh</div>\n" +
              "</body>\n" +
              "\n" +
              "</html>".toLowerCase();

      String titleStartTag = "<title>";
      String titleEndTag = "</title>";

      int start = someHtml.indexOf(titleStartTag);
      int end = someHtml.indexOf(titleEndTag);

      if (start != -1 && end !=-1)
      {
         String titleText = someHtml.substring(start + titleStartTag.length(), end);

         System.out.println("title inner text is [" + titleText + "]");
      }



----------------------

Output when run is :

    title inner text is [this is my title]
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LVL 7

Expert Comment

by:lhankins
ID: 13640319
BTW - I did a .toLowerCase() on the whole HTML string because title could appear as <title> or <TITLE>.      This will also make the inner text lower case.  To get around this, you could find the <title> start and end via the lowercase string, then fall back to the original HTML string when doing the .substring.

0
 
LVL 25

Author Comment

by:InteractiveMind
ID: 13640424
Fantastic! Thank you very much.  :)
>> IM
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