How to extract date from a string in Scala

Question

I have two Strings. The first is like this one:

{"userId":"554555454-45454-54545","start":"20141114T172252.466z","end":"20141228T172252.466z","accounts":[{"date":"20141117T172252.466z","tel":"0049999999999","dec":"a dec","user":"auser"},{"date":"20141118T172252.466z","tel":"004888888888","dec":"another dec","user":"anotheruser"}]}

the second one has the same dates but in a different format. Instead of

20141117T172252.466z

it shows

2014-11-14,17:22:52

I'm trying to extract the dates of the first String and assert that are the same with the dates from the second String. I've tried it with regular expressions but I'm getting an error Illegal repetition. How can I do this?

Answer 1

You can use SimpleDateFormat from java:

import java.text.SimpleDateFormat
import java.util.Date
val s1 = "{\"userId\":\"554555454-45454-54545\",\"start\":\"20141114T172252.466z\"}"
val s2 = "{\"userId\":\"554555454-45454-54545\",\"start\":\"2014-11-14,17:22:52\"}"
val i1 = s1.indexOf("start")
val i2 = s2.indexOf("start")
val str1 = s1.replace("T", "_").substring(i1+8, i1+ 23)
val str2 = s2.substring(i2+8, i2+27)
val date1: Date = new SimpleDateFormat("yyyyMMdd_hhmmss").parse(str1)
val date2: Date = new SimpleDateFormat("yyyy-MM-dd,hh:mm:ss").parse(str2)
val result = date1==date2