CODEWITHSUNDEEP
javahtmlregexhtml-parsing
user1545072
user1545072

Reputation:

Java matching a string with wildcard regex to find <H1> tags

I have several HTML files, each has a single <h1> tag in it. I want to parse that tag to get it's content (a name of a book). A tag looks like this for example:

<H1>bookname</H1>

I am trying to get it using this code:

Scanner scan = new Scanner(file, "Windows-1255");
String name="";
Pattern p = Pattern.compile("<H1>*</H1>"); //tried adding '(' and ')' around the '*', didn't help
while (scan.hasNext()) {
    name = scan.nextLine();
    Matcher m = p.matcher(name);
    if (m.matches()) {
        name = name.substring(4, name.length() - 6);
        break;
    }
}

It doesn't work, the h1 tag is never matched and I don't get the name. How is this supposed to be done?

Perhaps it's important, the contents of the H1 tags are in Hebrew, charset=Windows-1255.

Upvotes: 0

Views: 2987

Answers (2)

nirazul
nirazul

Reputation: 3955

I found an example that might work for you. It simplifies and generalizes also the matching procedure so you don't need to substring your found pattern:

String stringToSearch = "<h1>Yada yada yada yada </h1>";
String name = "";

// the pattern we want to search for
Pattern p = Pattern.compile("<h1>.*</h1>");
Matcher m = p.matcher(stringToSearch);

// if we find a match, get the group 
if (m.find())
{
  // get the matching group
  name = m.group(1);
}

Upvotes: 2

Dan Berindei
Dan Berindei

Reputation: 7194

Try using 

Pattern p = Pattern.compile("<H1>.*</H1>");

(notice the extra . - your version matches just empty tags).

Upvotes: 2

Related Questions