您可以尝试以下代码：

首先创建2个案例类来操纵您的数据框：

case class ResultArray(metric1: Double,metric2: Double,metric3: Double,metric4: Double,metricName: String,opportunityMetricsCol: Array[String])

case class ExpectedResult(value: String)

然后，您可以提取预期的列，如下所示：

val resultArray = Seq(ResultArray(0.55,0.66012,164.8204,4.5,"MetricCalc1",Array("metric1","metric2")),ResultArray(0.55,Array("metric3","metric4")))

+-------+-------+--------+-------+-----------+---------------------+
|metric1|metric2|metric3 |metric4|metricName |opportunityMetricsCol|
+-------+-------+--------+-------+-----------+---------------------+
|0.55   |0.66012|164.8204|4.5    |MetricCalc1|[metric1,metric2]   |
|0.55   |0.66012|164.8204|4.5    |MetricCalc1|[metric3,metric4]   |
+-------+-------+--------+-------+-----------+---------------------+

    val resultArrayDF = resultArray.toDF

    val expectedResult: Dataset[ExpectedResult] = resultArrayDF.map{ value =>
      val opportunityMetricsCol: util.List[String] = value.getList(5)

      ExpectedResult(opportunityMetricsCol.get(0))

    }

    resultArrayDF.select(expectedResult.first().value).show(false)

    expectedResult.show(false)

+-------+
|metric1|
+-------+
|0.55   |
|0.55   |
+-------+

希望这会有所帮助