qq_34335450的博客

import org.apache.spark.sql.functions._ import org.apache.spark.sql.types._ import org.apache.spark.sql._ import org.apache.spark.rdd.RDD val schema: StructType = dataframeA.schema.add(StructField("id", LongType)) // DataFrame转RDD 然后调用 zipWithInde

df中想增加一列数据 import org.apache.spark.sql.functions._ df.withColumn("column_name", lit("content"))