JustAuth is the best third-party login tool written in JAVA, as you see, It's smaller and easier to use.

JustAuth has integrated dozens of third-party OAuth services such as QQ, weibo, wechat, Google, Facebook, twitter, etc.

JustAuthPlus(JAP) is an open source authentication middleware, it is highly decoupled from business code and has good modularity and flexiblity. Developers could integrate JAP into web applications effortlessly.