Shortening java UUID while preserving the uniqueness

I use org.apache.commons.codec.binary.Base64 to convert a UUID into a url-safe unique string that is 22 characters in length and has the same uniqueness as UUID.

I posted my code on Storing UUID as base64 String

Take a look at FriendlyId library. This library allow to encode UUID to Base62 string (Url62) and back. Uniqueness is achieved and encoded string is shorter.