scala时间工具类

import java.sql.Timestamp
import java.text.SimpleDateFormat
import java.util.{Calendar, Date}

import org.apache.spark.sql.Column
import org.apache.spark.sql.functions._
import org.joda.time.DateTime
import org.joda.time.format.{DateTimeFormat, DateTimeFormatter}
/**
  * 对时间进行处理
  * Created by 260169 on 2017/11/27.
  */
object DateUtil {
  def dateFormat(time:Column){
    time.cast("timestamp")
  }

  //求两个时间之差
  def getDiffTime(startTime:Column,endTime:Column)={
    if(startTime==null || endTime == null ) lit(-1)
    else {
      val timeFormt="yyyy-MM-dd HH:mm:ss"
      val start=date_format(startTime,timeFormt)
      val end =date_format(endTime,timeFormt)
      unix_timestamp(end,timeFormt)-unix_timestamp(start,timeFormt)
    }
  }

  //求某个时间的向前或向后x秒的时间
  def getAddTime(start_Time:Timestamp,interval:Int):Timestamp={
    var sdf:SimpleDateFormat=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
    var timeFormt="yyyy-MM-dd HH:mm:ss"
    var time:Long =DateFormat(start_Time)
    val addtime: Long =time+interval
    val addtime1: String =sdf.format(addtime*1000)
    val finaltime=Timestamp.valueOf(addtime1)
    finaltime
  }


  //返回Timestamp前Int天的年、月、日
  def getYMDHMS(SubTime: String,Day:Int):String = {
    val subY = SubTime.substring(0,4)
    val subM = SubTime.substring(5,7)
    val subD = SubTime.substring(8,10).toLong
    val subH = SubTime.substring(11,13)
    val subMI = SubTime.substring(14,16)
    val subS = SubTime.substring(17,19)

    val orgDay= (subD - Day).toString
    val dd = subY+"-" +subM+"-"+orgDay+" "+subH+":"+subMI+":"+subS
    val format1: SimpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
    //     println(  format1.format(format1.parse(dd)))

    val tt =format1.format(format1.parse(dd))
    tt
  }


def getDay(dateString:String,beforeDay:Int):String={

    val sdf:SimpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
    val temp1=sdf.parse(dateString)

    val calendar= Calendar.getInstance()
    calendar.setTime(temp1)
    //  calendar.add(Calendar.YEAR,1)// 年加1
    //  calendar.add(Calendar.MONTH,1)// 月加1
    calendar.add(Calendar.DAY_OF_MONTH,-beforeDay)//往前beforeDay
    //  calendar.add(Calendar.HOUR_OF_DAY,2)//小时加2
    //  calendar.add(Calendar.MINUTE,2)//分钟加2
    //  calendar.add(Calendar.SECOND,2)//秒加2

    val result = sdf.format(calendar.getTime)
    result
  }


  def DateFormat(time:Timestamp):Long={

    val sdf: SimpleDateFormat =new SimpleDateFormat("yyyy-MM-dd HH:mm:ss") //定义格式，不显示毫秒
    val dt: Date =sdf.parse(time.toString)

    dt.getTime()/1000
  }
  def DateFormatday(time:Timestamp):Long={

    val sdf: SimpleDateFormat =new SimpleDateFormat("yyyy-MM-dd") //定义格式，不显示毫秒
    val dt: Date =sdf.parse(time.toString)

    dt.getTime()/1000
  }

//获取year、month、day字段
  def getYMD(time: Timestamp, minusDay: Int = 0): (Option[Int], Option[Int], Option[Int]) = {
    val format: DateTimeFormatter = DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss.SSS")
    val dateTime: DateTime = DateTime.parse(time.toString, format)
    val localTime1: Array[String] = dateTime.minusDays(minusDay).toString("yyyy-MM-d").split("-", 3)//去除2016-10-01中的-
    val year: Int = localTime1(0).toInt
    val month: Int = localTime1(1).toInt
    val day: Int = localTime1(2).toInt

    (Option(year), Option(month), Option(day))

  }
  //获取当前系统时间
  def getLocalTime: Timestamp = {
    val localTime1 = DateTime.now.toString("yyyy-MM-dd HH:mm:ss")
    val localTime = Timestamp.valueOf(localTime1)
    localTime
  }

// 获取当前时间
  def getNowTime: Timestamp = {
val now=new DateTime()
val fmt=DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss")
   
    fmt.print(now)
  }

}

 

原文地址：https://blog.csdn.net/u014384314/article/details/83381262