https://zhuanlan.zhihu.com/p/23141509
https://blog.csdn.net/u011470552/article/details/54564636
https://www.cnblogs.com/Mrwan/p/7380574.html
spark-submit --master spark://hadoop1:7077 --class org.gxu.jsj.wt tw.jar hdfs://hadoop1:9000/test1/hello.txt
spark-submit recommend.py