I want to know: is there any API or a query interface through which I can access Wikipedia data?
Mediawiki, the wiki platform that wikipedia uses does have an HTTP based API. See MediaWiki API.
For example, to get pages with the title stackoverflow, you call
http://en.wikipedia.org/w/api.php?action=query&titles=Stackoverflow
There are some (incomplete) Java wrappers around the API - see the Client Code - Java section of the API page for more detail.
For the use with Java, try http://code.google.com/p/wiki-java. It is only one class, but a great one!
I had the same question and the closest I came to an out-of-the-box solution is bliki, hosted at http://code.google.com/p/gwtwiki/. I also wrote an article at Integrating Stuff to help you get started with it: http://www.integratingstuff.com/2012/04/06/hook-into-wikipedia-using-java-and-the-mediawiki-api/
There is list of Java libraries that can help you to connect wiki by java code . https://www.mediawiki.org/wiki/API:Client_code#Java
but after use some of them because of their limitations , we try to call REST services from mediawiki directly.
来源:https://stackoverflow.com/questions/1397938/is-there-any-api-in-java-to-access-wikipedia-data