Question

I have to implement almost similar system to Spring PathVariable. I know how to parse my own url definition:

Definition :

blog-{String}-{Integer}

Code :

Pattern p = Pattern.compile("\\{.+?\\}");
Matcher m = p.matcher(pathFormat);
while(m.find())
{
    String group = m.group();
    // ...
}

But how can I parse real urls with my format? If real url was like

blog-my-first-blogging-10001

Real url doesn’t have brackets, so how can I use regex to match my groups. Type of group is known, but how to match without brackets ?

Answer 1

Maybe a bit silly, but why not try:

 String restOfPath = pathFormat.substring(5); //eliminate 'blog-' prefix
 int lastDash = restOfPath.lastIndexOf('-'); //find the last '-'
 String title = restOfPath.substring(0, lastDash);  // take what's before '-'
 String id = restOfPath.substring(lastDash + 1); // take the rest.

??

Unless your paths can get more complicated than blog-{String}-{Integer} there’s no need for regex here.