获取当前时间前一小时(比如hdfs目录就是按照年月日小时来分级的)

直接调这个方法就可以

package emg.util

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

/**
  * @Auther: sss
  * @Date: 2018/12/26 18:15
  * @Description:
  */
object Time {

  def main(args: Array[String]): Unit = {
    val calendar: Calendar = Calendar.getInstance()
    println(getFrontHour())
  }

  def getFrontHour(): String = {
    var date: Date = new Date()
    val df = new SimpleDateFormat("yyyy-MM-dd-HH")

    val calendar: Calendar = Calendar.getInstance()
    calendar.setTime(df.parse(df.format(date)))
    calendar.add(Calendar.HOUR_OF_DAY, -1)
    val currentTimes = df.format(calendar.getTime)
    currentTimes
  }
}package emg.util

import ja