Scala中的日期转换问题

Question

I have a scenario where I have to get difference between the current date with the dates in a column from the dataframe . I am facing an issue when I took the current date which is in localDate format and the date from dataframe are in date datatype.

Also I have tried to convert current day to string and and convert the data from dataframe to string but am not getting expected output as dates should be compared with date datatypes.

I have used the below code:

import java.time.LocalDate
val localDate = LocalDate.now 

def computeCarAge(importvoices:DataFrame): DataFrame = {

val computeCarAgeUDF = udf (
    (aged: Date) =>
      if (aged < localDate ) {
        "from0to1year"
      } else if (aged <= localDate) {
        "from1to2years" }
)

How to compare java local date to spark.sql.date which is in (yyyy-MM-dd) format?

Answer 1

You can convert the localDate of Java to Date datatype and then compare with your dataframe date. The sample code to convert LocalDate to Date Datatype is:

Date date = Date.from(localDate.atStartOfDay(ZoneId.systemDefault()).toInstant());

The code sample is in Java but you can write the scala version of it :)