Question

I want to get my dates into a format like this: 2010-10-01

How do I do this?

Also, I grabbed this from another question:

use (groovy.time.TimeCategory) {

Date date = Date.parse("dd-MMM-yyyy", "15-Mar-2011")

def months = (0..11).collect { 
    (date + it.months).format("MMM/yyyy") 
}

}

How would I change the output of this script to the format I specified above? Thanks:)

Answer 1

In order to parse it out from a String:

Date.parse( "yyyy-M-d", "2010-10-01" )

In order to format the date that you already have:

def yourDate= new GregorianCalendar( 2010, Calendar.OCTOBER, 1 )

assert String.format('%tY-%<tm-%<td', yourDate) == '2010-10-01'

EDIT (to answer the comment)

groovy:000> yourDate= new GregorianCalendar( 2010, Calendar.OCTOBER, 1 )
===> java.util.GregorianCalendar[...]
groovy:000> print String.format('%tY-%<tm-%<td', yourDate)
2010-10-01===> null
groovy:000>

and backwards:

groovy:000> Date.parse( "yyyy-M-d", String.format('%tY-%<tm-%<td', yourDate) )
===> Fri Oct 01 00:00:00 EDT 2010

current date:

groovy:000> yourDate = Calendar.instance
===> java.util.GregorianCalendar[..]
groovy:000> print String.format('%tY-%<tm-%<td', yourDate) 
2011-11-03===> null