weixin_41850360的博客

log4j:WARN No appenders could be found for logger (org.apache.flink.api.scala.ClosureCleaner$).log4j:WARN Please initialize the log4j system properly.log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.————————————————报.

mongodb 查询操作1. 简单查询使用如下命令，进行查询。db.col.find({})# 根据名称查询db.col.find({name : "test"})# 根据id查询db.col.find({_id : ObjectId("5e6b3e6ba5677ada17d918b6")})# 根据日期进行查询db.col.find({startDate: ISODate(...