在Spark 1.6.2中，我可以通过执行非常简单的操作来读取本地拼花文件：

SQLContext sqlContext = new SQLContext(new SparkContext("local[*]", "Java Spark SQL Example"));
DataFrame parquet = sqlContext.read().parquet("file:///C:/files/myfile.csv.parquet");
parquet.show(20);

我正在尝试升级到Spark 2.0.0并通过运行来实现相同的目标：

SparkSession spark = SparkSession.builder().appName("Java Spark SQL Example").master("local[*]").getOrCreate();
Dataset<Row> parquet = spark.read().parquet("file:///C:/files/myfile.csv.parquet");
parquet.show(20);

这是在Windows上运行的，来自intellij（Java项目），我目前没有使用hadoop集群（稍后会出现，但目前我只是试图正确处理逻辑并熟悉API）。

不幸的是，当使用park 2.0运行时，代码给出了一个异常：

Exception in thread "main" java.lang.IllegalArgumentException: java.net.URISyntaxException: Relative path in absolute URI: file:C:/[my intellij project path]/spark-warehouse
at org.apache.hadoop.fs.Path.initialize(Path.java:206)
at org.apache.hadoop.fs.Path.<init>(Path.java:172)
at org.apache.spark.sql.catalyst.catalog.SessionCatalog.makeQualifiedPath(SessionCatalog.scala:114)
at org.apache.spark.sql.catalyst.catalog.SessionCatalog.createDatabase(SessionCatalog.scala:145)
at org.apache.spark.sql.catalyst.catalog.SessionCatalog.<init>(SessionCatalog.scala:89)
at org.apache.spark.sql.internal.SessionState.catalog$lzycompute(SessionState.scala:95)
at org.apache.spark.sql.internal.SessionState.catalog(SessionState.scala:95)
at org.apache.spark.sql.internal.SessionState$$anon$1.<init>(SessionState.scala:112)
at org.apache.spark.sql.internal.SessionState.analyzer$lzycompute(SessionState.scala:112)
at org.apache.spark.sql.internal.SessionState.analyzer(SessionState.scala:111)
at org.apache.spark.sql.execution.QueryExecution.assertAnalyzed(QueryExecution.scala:49)
at org.apache.spark.sql.Dataset$.ofRows(Dataset.scala:64)
at org.apache.spark.sql.SparkSession.baseRelationToDataFrame(SparkSession.scala:382)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:143)
at org.apache.spark.sql.DataFrameReader.parquet(DataFrameReader.scala:427)
at org.apache.spark.sql.DataFrameReader.parquet(DataFrameReader.scala:411)
at lili.spark.ParquetTest.main(ParquetTest.java:15)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Caused by: java.net.URISyntaxException: Relative path in absolute URI: file:C:/[my intellij project path]/spark-warehouse
at java.net.URI.checkPath(URI.java:1823)
at java.net.URI.<init>(URI.java:745)
at org.apache.hadoop.fs.Path.initialize(Path.java:203)
... 21 more

我不知道为什么它试图触摸我项目目录中的任何东西——是否有任何我遗漏的配置在火花1.6.2中被合理默认，但在2.0中不再如此？换句话说，在windows上的火花2.0中读取本地拼花文件的最简单方法是什么？