Question

I need to retrieve a regex pattern matched strings from the given input.

Lets say, the pattern I need to get is like,

"http://mysite.com/<somerandomvalues>/images/<againsomerandomvalues>.jpg"

Now I created the following regex pattern for this,

http:\/\/.*\.mysite\.com\/.*\/images\/.*\.jpg

Can anybody illustrate how to retrieve all the matched pattern with this regx expression using Java?

Answer 1

You don’t mask slashes but literal dots:

    String regex = "http://(.*)\\.mysite\\.com/(.*)/images/(.*)\\.jpg";
    String   url = "http://www.mysite.com/work/images/cat.jpg";
    Pattern pattern = Pattern.compile (regex);
    Matcher matcher = pattern.matcher (url);

    if (matcher.matches ())
    {
        int n = matcher.groupCount ();
        for (int i = 0; i <= n; ++i)
            System.out.println (matcher.group (i));
    }

Result:

www
work
cat