Calculo de Días hábiles entre 2 fechas (no incluye feriados)

gistfile1.groovy

import groovy.time.TimeCategory
/// Magia
def weekendDays(from, to){
	use(groovy.time.TimeCategory){
		def d = (to - from).days
		def w = d/7 as Integer
		def toWD = to[Calendar.DAY_OF_WEEK]
		def fromWD = from[Calendar.DAY_OF_WEEK]

		java.lang.Math.min(w * 2 + (fromWD > toWD ? 2 : (toWD == 7 ? 1:0) + (fromWD  == 1 ? 1:0)), d)
	}
}

/// Test

use(TimeCategory){
	Date from = new Date('2015/05/15')
	Date to = new Date('2015/05/23')


	for ( ; from < to ; from = from + 1.day) { 
		def elapsedTime = to - from
		println "$from -> $to"
		println elapsedTime.days
		println "-"*50
		println from[Calendar.DAY_OF_WEEK] + "."*elapsedTime.days + to[Calendar.DAY_OF_WEEK]
		def we = weekendDays(from, to)
		println "Weekend days $we -> Bussines days: ${elapsedTime.days - we}"
		println "."*50
	}
}