我有以下代码,试图将日期格式"2010-12-01 8:34"
更改为"2010-12-01"
(日期格式)
val rowRDD = data.map(attributes => Row(attributes(0), attributes(1), attributes(2), attributes(3).toInt, attributes(4), attributes(5).toDouble, attributes(6), attributes(7)))
val r1DF = spark.createDataFrame(rowRDD, schema)
val ts = unix_timestamp($"invoiceDate","yyyy/MM/dd HH:mm").cast("timestamp")
val r2DF = r1DF.withColumn("ts", ts)
r2DF.show()
但新列ts在输出中显示值null
。我不知道,有什么问题?有人可以帮忙吗?
试试这个:
to_date(unix_timestamp($"invoiceDate","yyyy-MM-dd HH:mm").cast("timestamp"))
要么
from_unixtime(unix_timestamp($"invoiceDate","yyyy-MM-dd HH:mm"),"yyyy-MM-dd")