Question

I need to find short url in the text post in java. I have the following regex expression
“(http://(bit\.ly|t\.co|lnkd\.in|tcrn\.ch).*?)\s”

I have 2 questions

1. The problem with the above expression is it doesn’t match the short
   url if it is at the end of line. ex For text “blah
   http://linkd.in/R9Msf3 blah” gives “http://linkd.in/R9Msf3 “

   But blah blah http://linkd.in/R9Msf3 does not gives
   “http://linkd.in/R9Msf3”

   Any suggestions how to match both patterns ? Basically I just need
   to replace the short url out of the text.

2. Also is there a better way to get all the short url format? If I
   hard code it then everytime I would have to add a new format to the
   config.

Answer 1

Instead of .* use \S* to avoid matching whitespace. You don’t need the ? and you can use \b instead of \s to match the boundary between the end of the url and whitespace or end of string.

(http://(bit\.ly|t\.co|lnkd\.in|tcrn\.ch)\S*)\b