fix SparkClientGenerator when reading file, wrong columns (vesoft-inc…

…#2187)

Co-authored-by: knightjya <knightjya@localhost.localdomain>
Co-authored-by: yaphet <darion.wang@vesoft.com>
Co-authored-by: dangleptr <37216992+dangleptr@users.noreply.github.com>

src/tools/spark-sstfile-generator/src/main/scala/com/vesoft/nebula/tools/generator/v2/SparkClientGenerator.scala

@@ -310,7 +310,7 @@ object SparkClientGenerator {
               val values = (for {
                 property <- valueProperties if property.trim.length != 0
               } yield extraValue(row, property)).mkString(",")
-              (row.getString(vertexIndex), values)
+              (String.valueOf(extraValue(row, vertex)), values)
             }(Encoders.tuple(Encoders.STRING, Encoders.STRING))
             .foreachPartition { iterator: Iterator[(String, String)] =>
               val service      = MoreExecutors.listeningDecorator(Executors.newFixedThreadPool(1))