https://blog.csdn.net/luofazha2012/article/details/80636858
https://www.cnblogs.com/brooksj/p/spark-Apriori.html
https://github.com/tracy-talent/curriculum/tree/master/MapReduce/Apriori
https://cosx.org/2015/04/spark-beginner-1/
http://spark.apache.org/docs/latest/
https://spark.apache.org/docs/latest/quick-start.html
http://www.codexiu.cn/spark/blog/28403/