I have made a web application and now I would like to add a search option to it. Since it is a learning project, I can't afford to buy some Google license. That is why I consider creating my own search engine.
From what I have read, there are two major ways to do it: using
Apache Lucene or using
Apache Solr. I have read a bit about both, but I really don't understand what is the difference between them. Which one should I choose?
I am looking for something free which is easy to learn and use, so you have other suggestions please let me know.