如何将Spark数据框写入xml文件？

Question

Sample :

scala> Frame.show()

|year| make|model|             comment|blank|
|2012|Tesla|    S|          No comment|    R|
|1997| Ford| E350|Go get one now th...|    L|
|2015|Chevy| Volt|                 Try|    M|

to

<item>
    <'year'>2012<'/year'>
    <'make'>Tesla<'/make'>
    <'model'>S<'/mode'>
</item>

Answer 1

The simplest approach is to use XML writer from spark-xml :

val path: String = ???
df.write.format("com.databricks.spark.xml")
  .option("rootTag", "items")
  .option("rowTag", "item")
  .save(path)

If for some reason it doesn't fit your needs you can dump records individually and saveAsTextFile :

def dumpXML(row: Row): String = ???
df.rdd.map(dumpXML).saveAsTextFile(path)

You can add root element using for example mapPartitions .