Utils：工具类十八般武艺——小试牛刀

package com.MC.utils

import java.text.SimpleDateFormat
import java.util.regex.Pattern

import scala.util.control.Breaks._
import java.math.BigDecimal
import java.util.Calendar

import com.MC.enum.DateEnum

import scala.math.BigDecimal.RoundingMode
/**
  * Created by MC on 2018/8/10.
  */
object Utils {
//  def main(args: Array[String]): Unit = {
//    println(getDateInfo(System.currentTimeMillis(),DateEnum.day))
//  }
  /**
    * 返回指定的时间单位，例如:year,season,month,week,day
    *
    * @param longTime
    * @param dateType
    */
  def getDateInfo(longTime: Long, dateType: DateEnum.Value) = {
    val calendar = Calendar.getInstance()
    calendar.setTimeInMillis(longTime)
    if (dateType.equals(DateEnum.year)) {
      calendar.get(Calendar.YEAR)
    } else if (dateType.equals(DateEnum.season)) {
      //month==>0-11
      val month = calendar.get(Calendar.MONTH) + 1
      if (month % 3 == 0) {
        month / 3
      } else {
        month / 3 + 1
      }
    } else if (dateType.equals(DateEnum.month)) {
      calendar.get(Calendar.MONTH) + 1
    } else if (dateType.equals(DateEnum.week)) {
      val month = calendar.get(Calendar.MONTH) + 1
      var week = calendar.get(Calendar.WEEK_OF_YEAR)
      if (month == 12 && week == 1) {
        week = 53
      }
      week
    } else if (dateType.equals(DateEnum.day)) {
      calendar.get(Calendar.DAY_OF_MONTH)
    } else {
      throw new Exception(
        """
          |Usage:com.daoke360.utils.Utils
          |在getDateInfo方法中，dateType参数传入有误
        """.stripMargin)
    }

  }


  /**
    * 四舍五入函数
    *
    * @param doubleValue
    * @param scale
    * @return
    */
  def getScale(doubleValue: Double, scale: Int) = {
    val bigDecimal = new BigDecimal(doubleValue)
    bigDecimal.setScale(scale, RoundingMode.HALF_UP).doubleValue()
  }

  /**
    * 获取字符串中某个字段的值
    *
    * @param value     原始字符串 session_count=0|1s_3s=7|4s_6s=0|7s_9s=0|10s_30s=0|30s_60s=0|1m_3m=0|3m_10m=0|10m_30m=0|30m=0|1_3=0|4_6=0|7_9=0|10_30=0|30_60=0|60=0
    * @param fieldName 字段名称，例如：session_count/1s_3s/4s_6s/....
    * @param separator 字符串分隔符  "|"
    */
  def getFieldValue(value: String, fieldName: String, separator: String) = {
    var fieldValue: String = null
    //items===>Array(session_count=0，1s_3s=7，4s_6s=0，....)
    val items = value.split(separator)
    breakable({
      for (item <- items) {
        //kv==>Array(session_count,0)
        val kv = item.split("=")
        if (kv(0).equals(fieldName)) {
          fieldValue = kv(1)
          break()
        }
      }
    })
    fieldValue
  }

  /**
    * 设置某个字段的值
    *
    * @param value         原始字符串 session_count=0|1s_3s=7|4s_6s=0|7s_9s=0|10s_30s=0|30s_60s=0|1m_3m=0|3m_10m=0|10m_30m=0|30m=0|1_3=0|4_6=0|7_9=0|10_30=0|30_60=0|60=0
    * @param fieldName     session_count
    * @param fieldNewValue 7
    * @param separator     |
    * @return session_count=7|1s_3s=7|4s_6s=0|7s_9s=0|10s_30s=0|30s_60s=0|1m_3m=0|3m_10m=0|10m_30m=0|30m=0|1_3=0|4_6=0|7_9=0|10_30=0|30_60=0|60=0
    */
  def setFieldValue(value: String, fieldName: String, fieldNewValue: String, separator: String) = {
    var fieldValue: String = null
    //items===>Array(session_count=7，1s_3s=7，4s_6s=0，....)
    val items = value.split(separator)
    breakable({
      for (i <- 0 until (items.length)) {
        val item = items(i)
        val kv = item.split("=")
        if (kv(0).equals(fieldName)) {
          items(i) = fieldName + "=" + fieldNewValue
          break()
        }
      }
    })
    items.mkString("|")
  }

  /**
    * 验证一个字符串是否是数字
    */
  def validateIsNumber(stringNum: String) = {
    val regex = "\\d+"
    val pattern = Pattern.compile(regex)
    pattern.matcher(stringNum).matches()
  }


  /**
    * 将时间戳转换成任意格式的是时间
    *
    * @param longTime
    * @param pattern
    */
  def formatDate(longTime: Long, pattern: String) = {
    val simpleDateFormat = new SimpleDateFormat(pattern)
    val calendar = simpleDateFormat.getCalendar
    calendar.setTimeInMillis(longTime)
    simpleDateFormat.format(calendar.getTime)
  }


  /**
    * 将指定格式的日期转换成时间戳
    *
    * @param inputDate
    * @param pattern
    */
  def parseDate(inputDate: String, pattern: String) = {
    val simpleDateFormat = new SimpleDateFormat(pattern)
    val date = simpleDateFormat.parse(inputDate)
    date.getTime
  }


  /**
    * 验证输入的日期是否是指定的格式：yyyy-MM-dd
    *
    * @param inputDate
    * @return
    */
  def validateInputDate(inputDate: String) = {
    val regex = "(([0-9]{3}[1-9]|[0-9]{2}[1-9][0-9]{1}|[0-9]{1}[1-9][0-9]{2}|[1-9][0-9]{3})-(((0[13578]|1[02])-(0[1-9]|[12][0-9]|3[01]))|((0[469]|11)-(0[1-9]|[12][0-9]|30))|(02-(0[1-9]|[1][0-9]|2[0-8]))))|((([0-9]{2})(0[48]|[2468][048]|[13579][26])|((0[48]|[2468][048]|[3579][26])00))-02-29)"
    val pattern = Pattern.compile(regex)
    pattern.matcher(inputDate).matches()
  }


  /**
    * 将ip解析成数字
    * [.]    *
    *
    * @param ip
    * @return
    */
  def ipToLong(ip: String): Long = {
    val fields = ip.split("[.]")
    var numIP: Long = 0
    for (i <- 0 until (fields.length)) {
      numIP = numIP << 8 | fields(i).toLong
    }
    numIP
  }

  /**
    * 将nginx服务器器时间转换成时间戳
    *
    * @param nginxServerTime 1522284413.802:String===> 1522284413802:Long
    */
  def nginxServerTimeToLong(nginxServerTime: String) = {
    (nginxServerTime.toDouble * 1000).toLong
  }
}