Spark Connector Scala Guide
https://docs.mongodb.com/spark-connector/current/scala-api/
Spark与mongodb整合完整版本
https://cloud.tencent.com/developer/article/1032526
MongoDB中的日期查询命令的记录：大于、小于、等于、范围内、(mongoVUE 操作记录)
https://blog.csdn.net/qq_27093465/article/details/53647930