Question

我正在尝试读取具有日期列的Excel文件。我想验证它，但是在验证日期类型字段时，此方法不起作用。我尝试使用文本文件，并且可以正常工作。根据我的观察，Excel文件默认将日期值保存为日期类型而不是字符串。但我试图解析（字符串类型）。但是我不知道如何将Excel列读为字符串。

我试图读取它以直接读取getCell值，但它对我不起作用。

java.time.LocalDate.parse(row.getCell(2) , java.time.format.DateTimeFormatter.ofPattern(DATE_TIME_FORMAT))

val DATE_TIME_FORMAT = "MM/dd/yyyy"

  def validateDf(row: Row): Boolean = try {
    //assume row.getString(1) with give Datetime string
    java.time.LocalDate.parse(row.getString(2) , java.time.format.DateTimeFormatter.ofPattern(DATE_TIME_FORMAT))
    java.time.LocalDate.parse(row.getString(3) , java.time.format.DateTimeFormatter.ofPattern(DATE_TIME_FORMAT))
    true
  } catch {
    case ex: java.time.format.DateTimeParseException => {
      // Handle exception if you want
      println("Exception : " + ex)
      false
    }
  }
val validDf = sample1.filter(validateDf(_))
val inValidDf = sample1.except(validDf)

Input Excel Data
-------+-----+-----------+-------------+
|AirName|Place|TakeoffDate|arriveoffDate|
+-------+-----+-----------+-------------+
|  Delta|  Aus|  12/6/2015|    11/6/2015|
|  Delta|     |  12/6/2016|    01/6/2016|
| Vistra|  New|  11/6/2017|    04/6/2017|
|  Delta|  Aus|  10/6/2018|    04/6/2018|
| JetAir|  Aus|  14/6/2019|    04/6/2019|
+-------+-----+-----------+-------------+

Expected valid Data(Based on Valid and Invalid date)
-------+-----+-----------+-------------+
|AirName|Place|TakeoffDate|arriveoffDate|
+-------+-----+-----------+-------------+
|  Delta|  Aus|  12/6/2015|    11/6/2015|
|  Delta|     |  12/6/2016|    01/6/2016|
| Vistra|  New|  11/6/2017|    04/6/2017|
|  Delta|  Aus|  10/6/2018|    04/6/2018|
+-------+-----+-----------+-------------+
Expected Invalid Data
-------+-----+-----------+-------------+
|AirName|Place|TakeoffDate|arriveoffDate|
+-------+-----+-----------+-------------+
|  Delta|  Aus|  14/6/2019|    04/6/2018|
+-------+-----+-----------+-------------+
```

Answer 1

我建议使用apache poi从excel文件中读取数据。您可以这样实现：

val DATE_TIME_FORMAT = "MM/dd/yyyy"
val currentCell = row.getString(1)
if (DateUtil.isCellDateFormatted(currentCell)) {
   try {

     SimpleDateFormat sdf = new SimpleDateFormat(DATE_TIME_FORMAT)
     val cellValue = sdf.format(currentCell.getDateCellValue())

   } catch (ParseException e) {
        e.printStackTrace()
   }
}

读取日期值表格Excel文件

1 个答案: