摘要：
计算间隔vald=newjava。文本SimpleDateFormat（“yyyyMMddHH:mm:ss”）。format（newjava.util.Date（））valdateFormat=newjava。文本SimpleDateFormat（“yyyyMMddHH:mm:ss”）//系统时间值d1=newjava。util。Date（）valnowDate:字符串=
计算时间间隔
val d = new java.text.SimpleDateFormat("yyyyMMdd HH:mm:ss").format(new java.util.Date())
val dateFormat = new java.text.SimpleDateFormat("yyyyMMdd HH:mm:ss")
// 系统时间
val d1 = new java.util.Date()
val nowDate: String = dateFormat.format(d1)
// 输入指定时间
val dd: Date = dateFormat.parse("20161229 14:20:50")
// 时间差
val d3 = new java.util.Date()
val d4 = new java.util.Date()
val diff = d4.getTime - d3.getTime // 返回自此Date对象表示的1970年1月1日，00:00:00 GMT以来的毫秒数。
val diffMinutes = diff / (1000 * 60) // 时间间隔，单位：分钟
产生日期序列
import java.util.Calendar
import java.util.Date
import java.text.SimpleDateFormat
import scala.collection.mutable.ListBuffer
// 输入开始日期和结束日期
val stringDateBegin: String = "20160101"
val stringDateEnd: String = "20160209"
val dateFormat: SimpleDateFormat = new SimpleDateFormat("yyyyMMdd")
val dateBegin: Date = dateFormat.parse(stringDateBegin)
val dateEnd: Date = dateFormat.parse(stringDateEnd)
val calendarBegin: Calendar = Calendar.getInstance()
val calendarEnd: Calendar = Calendar.getInstance()
calendarBegin.setTime(dateBegin)
calendarEnd.setTime(dateEnd)
// 计算日期间隔天数
val diff = calendarEnd.getTimeInMillis() - calendarBegin.getTimeInMillis()
val diffDay = (diff / (1000 * 60 * 60 * 24)).toInt
val calendarList = new ListBuffer[String]()
for (d <- 0 to diffDay) {
// 日期转化成"yyyyMMdd"
calendarList.append(dateFormat.format(calendarBegin.getTime()))
calendarBegin.add(Calendar.DAY_OF_MONTH, 1)
}
calendarList.mkString(",")
执行结果
// 输入开始日期和结束日期
val stringDateBegin: String = "20160101"
stringDateBegin: String = 20160101
val stringDateEnd: String = "20160209"
stringDateEnd: String = 20160209
val dateFormat: SimpleDateFormat = new SimpleDateFormat("yyyyMMdd")
dateFormat: java.text.SimpleDateFormat = java.text.SimpleDateFormat@ef87e460
val dateBegin: Date = dateFormat.parse(stringDateBegin)
dateBegin: java.util.Date = Fri Jan 01 00:00:00 UTC 2016
val dateEnd: Date = dateFormat.parse(stringDateEnd)
dateEnd: java.util.Date = Tue Feb 09 00:00:00 UTC 2016
val calendarBegin: Calendar = Calendar.getInstance()
calendarBegin: java.util.Calendar = java.util.GregorianCalendar[time=1480484154627,areFieldsSet=true,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Etc/Universal",offse
t=0,dstSavings=0,useDaylight=false,transitions=0,lastRule=null],firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=2016,MONTH=10,WEEK_OF_YEAR=49,WEEK_OF_MONTH=5,DAY_OF_MONTH=30,DAY_OF_YEAR=335,DAY_OF_WEEK=4,DAY_OF_WEEK_IN_MONTH=5,AM_PM=0,HOUR=5,HOUR_OF_DAY=5,MINUTE=35,SECOND=54,MILLISECOND=627,ZONE_OFFSET=0,DST_OFFSET=0]
val calendarEnd: Calendar = Calendar.getInstance()
calendarEnd: java.util.Calendar = java.util.GregorianCalendar[time=1480484154845,areFieldsSet=true,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Etc/Universal",offset=
0,dstSavings=0,useDaylight=false,transitions=0,lastRule=null],firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=2016,MONTH=10,WEEK_OF_YEAR=49,WEEK_OF_MONTH=5,DAY_OF_MONTH=30,DAY_OF_YEAR=335,DAY_OF_WEEK=4,DAY_OF_WEEK_IN_MONTH=5,AM_PM=0,HOUR=5,HOUR_OF_DAY=5,MINUTE=35,SECOND=54,MILLISECOND=845,ZONE_OFFSET=0,DST_OFFSET=0]
calendarBegin.setTime(dateBegin)
calendarEnd.setTime(dateEnd)
// 计算日期间隔天数
val diff = calendarEnd.getTimeInMillis() - calendarBegin.getTimeInMillis()
diff: Long = 3369600000
val diffDay = (diff / (1000 * 60 * 60 * 24)).toInt
diffDay: Int = 39
val calendarList = new ListBuffer[String]()
calendarList: scala.collection.mutable.ListBuffer[String] = ListBuffer()
for (d <- 0 to diffDay) {
// 日期转化成"yyyyMMdd"
calendarList.append(dateFormat.format(calendarBegin.getTime()))
calendarBegin.add(Calendar.DAY_OF_MONTH, 1)
}
calendarList.mkString(",")
res12: String = 20160101,20160102,20160103,20160104,20160105,20160106,20160107,20160108,20160109,20160110,20160111,20160112,20160113,20160114,20160115,20160116,20160117,20160118,20160119,2016
0120,20160121,20160122,20160123,20160124,20160125,20160126,20160127,20160128,20160129,20160130,20160131,20160201,20160202,20160203,20160204,20160205,20160206,20160207,20160208,20160209