[Java][Spark] dataframe to csv

    yourDf
    .coalesce(1) // if you want to save as single file
    .write
    .option("sep", "\t")
    .option("encoding", "UTF-8")
    .csv("outputpath")

https://stackoverflow.com/questions/61063446/how-to-write-a-spark-dataframe-tab-delimited-as-a-text-file-using-java

How to write a spark dataframe tab delimited as a text file using java