spark日期类型转换

import java.util.Date

import java.text.SimpleDateFormat

import java.util.Calendar

object DateUtil {

//获取今天日期

def getNowDate(): String = {

var now: Date = new Date()

var dateFormat = new SimpleDateFormat("yyyy-MM-dd")

var day = dateFormat.format(now)

day

}

//获取昨天的日期

def getYesterday(): String = {

var dateFormat: SimpleDateFormat = new SimpleDateFormat("yyyy-MM-dd")

var cal: Calendar = Calendar.getInstance()

cal.add(Calendar.DATE, -5)

var yesterday = dateFormat.format(cal.getTime())

yesterday

}

//获取本周开始日期

def getNowWeekStart(): String = {

var period: String = ""

var cal: Calendar = Calendar.getInstance();

var df: SimpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");

cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY)

//获取本周一的日期

period = df.format(cal.getTime())

period

}

//获取本周末的时间

def getNowWeekEnd(): String = {

var period: String = ""

var cal: Calendar = Calendar.getInstance();

var df: SimpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");

cal.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY); //这种输出的是上个星期周日的日期，因为老外把周日当成第一天

cal.add(Calendar.WEEK_OF_YEAR, 1) // 增加一个星期，才是我们中国人的本周日的日期

period = df.format(cal.getTime())

period

}

//本月的第一天

def getNowMonthStart(): String = {

var period: String = ""

var cal: Calendar = Calendar.getInstance();

var df: SimpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");

cal.set(Calendar.DATE, 1)

period = df.format(cal.getTime()) //本月第一天

period

}

//本月的最后一天

def getNowMonthEnd(): String = {

var period: String = ""

var cal: Calendar = Calendar.getInstance();

var df: SimpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");

cal.set(Calendar.DATE, 1)

cal.roll(Calendar.DATE, -1)

period = df.format(cal.getTime()) //本月最后一天

period

}

//将时间戳转化成日期时间戳是秒数，需要乘以1000l转化成毫秒

def DateFormat(time: String): String = {

var sdf: SimpleDateFormat = new SimpleDateFormat("yyyy-MM-dd")

var date: String = sdf.format(new Date((time.toLong * 1000l)))

date

}

//时间戳转化为时间，原理同上

def timeFormat(time: String): String = {

var sdf: SimpleDateFormat = new SimpleDateFormat("HH:mm:ss")

var date: String = sdf.format(new Date((time.toLong * 1000l)))

date

}

def fun(data1: String, date2: String) {

val sdf = new SimpleDateFormat("yyyy-mm-dd")

val b = sdf.parse(data1).getTime - sdf.parse(date2).getTime

val num = b / (1000 * 3600 * 24)

println(num)

}

def countMonths(date1: String, date2: String) {

val sdf = new SimpleDateFormat("yyyy-mm-dd");

val f = 0.0f;

var c1 = Calendar.getInstance();

var c2 = Calendar.getInstance();

c1.setTime(sdf.parse(date1));

c2.setTime(sdf.parse(date2));

var year = c2.get(Calendar.YEAR) - c1.get(Calendar.YEAR);

//println(year)

if (year < 0) {

year == -year

return year * 12 + c1.get(Calendar.MONTH) - c2.get(Calendar.MONTH);

}

return year * 12 + c2.get(Calendar.MONTH) - c1.get(Calendar.MONTH);

}

def months_between(beginDate: String, endDate: String) {

val sdf = new SimpleDateFormat("yyyy-mm-dd");

val begin = sdf.parse(beginDate);

val end = sdf.parse(endDate);

val months = (end.getYear() - begin.getYear()) * 12 + (end.getMonth() - begin.getMonth());

val y = (end.getYear() - begin.getYear()) * 12

val m = end.getMonth() - begin.getMonth();

println(y)

println("=================")

println(m)

}

def getMonthSpace(date1: String, date2: String) {

var result = 0;

var sdf = new SimpleDateFormat("yyyy-MM-dd");

var c1 = Calendar.getInstance();

var c2 = Calendar.getInstance();

c1.setTime(sdf.parse(date1));

c2.setTime(sdf.parse(date2));

result = c2.get(Calendar.MONDAY) - c1.get(Calendar.MONTH);

//if (result == 0) 1 else result

if (result == 0) 1 else Math.abs(result)

println(result)

}

def main(args: Array[String]) {

val s = getMonthSpace("2012-05-25","2012-05-27")

println(s)

}