试试这个（当然你可以忽略数据的创建，我添加它是为了让你了解流：列的名称和类型）：

Seq("21/10/2021 15:15:28").toDF("timeStr")
      .withColumn("australiaMelbourneTime", to_timestamp(col("timeStr"), "dd/MM/yyyy HH:mm:ss"))
      .withColumn("utcTime", to_utc_timestamp(col("australiaMelbourneTime"), "Australia/Melbourne"))

输出（测试）：

+-------------------+----------------------+-------------------+
|            timeStr|australiaMelbourneTime|            utcTime|
+-------------------+----------------------+-------------------+
|21/10/2021 15:15:28|   2021-10-21 15:15:28|2021-10-21 04:15:28|
+-------------------+----------------------+-------------------+