scala 使用java8的LocalDateTime实现字符串和时间戳的互换

 def coverStringTimeToLong(time:String): Long ={
    val format = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")
    val parse = LocalDateTime.parse(time, format)
    //getEpochSecond精确到秒，toEpochMilli精确到毫秒
    LocalDateTime.from(parse).atZone(ZoneId.systemDefault()).toInstant.toEpochMilli
  }

 def coverTimeStampToString(time:Long): String ={
    val format = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")
    format.format(LocalDateTime.ofInstant(Instant.ofEpochMilli(time),ZoneId.systemDefault()))
  }

将字符串转为LocalDateTime,使用它的方法

  def coverStringTimeToLocalDateTime(time:String): LocalDateTime ={
    val format = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")
    LocalDateTime.parse(time,format)
  }