Adding user authentication to a Java application

I need to authenticate users who visit my Java-based web application (servlets and JSP) using different social networks like facebook, twitter, google and yahoo.

Is there an open source library that solves this problem? Instead of working with a different API, it would be useful to use an open source java library.

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3 answers

The SpringSource guys have a library that does what you ask for, called Spring Social . A related blog article explains what it does with some good examples. But the project is still in beta testing (despite the fact that the quality of their results has always been sustainable).

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Take a look at openid4java .

This library allows you to activate OpenID using the Java webapp.

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You can use Open ID with openid4java .

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