读取Spark Scala中具有特殊字符'{'的文件，并在文件名中'}'

Question

我想在Spark Scala中读取一个文件，名称:monthlyPurchaseFile{202205}-May.TXT
我使用下面的代码:
val df = spark.read.text("handel_special_ch/monthlyPurchaseFile{202205}-May.TXT"

但我得到以下例外:

org.apache.spark.sql.AnalysisException: Path does not exist: file:/home/hdp_batch_datalake_dev/handel_special_ch/monthlyPurchaseFile{202205}-May.TXT
at org.apache.spark.sql.execution.datasources.DataSource$.$anonfun$checkAndGlobPathIfNecessary$3(DataSource.scala:792)
at org.apache.spark.util.ThreadUtils$.$anonfun$parmap$2(ThreadUtils.scala:372)
at scala.concurrent.Future$.$anonfun$apply$1(Future.scala:659)
at scala.util.Success.$anonfun$map$1(Try.scala:255)
at scala.util.Success.map(Try.scala:213)
at scala.concurrent.Future.$anonfun$map$1(Future.scala:292)
at scala.concurrent.impl.Promise.liftedTree1$1(Promise.scala:33)
at scala.concurrent.impl.Promise.$anonfun$transform$1(Promise.scala:33)
at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:64)
at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402)
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:175)

请建议，我怎么能读取文件字符{,}在其名称

Answer 1

传递给spark.read.text方法的path被视为正则表达式。由于{和}是特殊字符，Spark尝试根据该表达式匹配路径。您可以使用?字符来匹配任何字符，因此下面应该可以工作:

val df = spark.read.text("handel_special_ch/monthlyPurchaseFile?202205?-May.TXT"

Answer 2

字符\作为转义序列。因此，使用下面的代码按预期工作并解决了问题:

val df = spark.read.text("handel_special_ch/monthlyPurchaseFile\{202205\}-May.TXT"