Extracting contents of html -pattern matching

Question

Hi all,
I've been reading through past posts but can't quite find the solution to my problem. I'm trying to adapt the code below to deal with poorly formed html (i.e. < title>, < TitLe >, etc). The html is written to a text file and I want to extract the content of the <title> tags.
Any help would be appreciated.
David.
private void showTitleTag(String file) { // extract <title> tag content from HtmlFile.txt
        try {
          BufferedReader fileInput = new BufferedReader(new FileReader(file));
          String fileLine;
          String keepLine="";
          String title;
          int titlePos;
          int endTitlePos;
          int endOfTitlePos;
          boolean foundTag=false;
          while((fileLine = fileInput.readLine()) != null) {  // While not at end of text file
            titlePos = fileLine.indexOf("<title>");         // check for <title> tag (Change for tokenizer)
            endTitlePos = fileLine.indexOf("</title>");     // check for </title> tag
            if (titlePos>=0) {                              // if found
               foundTag=true;                               // set foundTag flag to true            
            if (foundTag) {
              keepLine+=fileLine;                             // append fileLine to keepLine
            if (endTitlePos>=0) {
               break;
        titlePos = keepLine.indexOf("<title>");
        endOfTitlePos = keepLine.indexOf("</title>");         // get location of </title>
        title = keepLine.substring(titlePos+7,endOfTitlePos); // dispose of </title> tag
        System.out.println(title);                            // print title content only
      catch(Exception e) {
} // showTitleTag

Answer 1

Hi all,
I've just found out that the code used below can cause a text file to corrupt. I'm not sure why but it's something to do with the FileChannel, ByteBuffer, CharBuffer section.
I thought I'd let you know, in case others experienced the same problem.
Here's the code I was using:
If anyone knows how to fix the problem, I'd be very interested.
Cheers,
David.
   //Shows title tag content of a given url
   private void showTitleTag(String file) {
    FileInputStream fis = null;
    try {
      fis = new FileInputStream(file);
      // The following three lines seem to cause the text file to corrupt intermittently
      FileChannel fc = fis.getChannel();
      ByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
      CharBuffer cb = Charset.forName("8859_1").newDecoder().decode(bb);
      Matcher m = Pattern.compile("<title\\s*>(.*?)</title\\s*>", Pattern.CASE_INSENSITIVE | Pattern.DOTALL).matcher(cb);
      if (m.find()) {
         String title1 = (m.group(1)).trim().replace('\n', ' ');
         String title = title1.replace('\r', ' ');
         System.out.println(title1);
         titlesList.addItem(title1);
         titlesList.setSelectedIndex(0);
      else
         System.out.println("No title found.");
    catch (Exception e) {
      e.printStackTrace();
    finally {
      try { fis.close(); }
      catch (Exception e) {}
   } // end showTitleTag