求助：scala的json4s把JValue转为对象时报错 java.lang.NoSuchMethodError: scala.Predef$.$conforms()Lscala/Predef$$less$colon$less;

测试代码：import org.json4s._import org.json4s.JsonDSL._import org.json4s.jackson.JsonMethods._case class Winner(id: Long, numbers: List[Int])object Test extends App{  val winner = Winner(23, List(2, 45, 34, 23, 3, 5))　 //Winner转json  val json = ("id" -> winner.id) ~ ("numbers" -> winner.numbers)  //json转String  val str: String = compact(render(json))  println(str)  implicit val formats = DefaultFormats  //String转json  val jValue: JValue = parse(str)  //json转Winner  val winner2: Winner = jValue.extract[Winner]  print(winner2)}报错：Exception in thread "main" java.lang.NoSuchMethodError: scala.Predef$.$conforms()Lscala/Predef$$less$colon$less;

spark是1.6.1，scala是2.10.5porm.xml<dependency>

    <groupId>org.apache.spark</groupId>    <artifactId>spark-core_2.10</artifactId>    <version>1.6.1</version></dependency><dependency>    <groupId>org.apache.spark</groupId>    <artifactId>spark-streaming_2.10</artifactId>    <version>1.6.1</version></dependency>

<dependency>    <groupId>org.apache.spark</groupId>    <artifactId>spark-streaming-kafka_2.10</artifactId>    <version>1.6.1</version></dependency><dependency>    <groupId>org.scala-lang</groupId>    <artifactId>scala-library</artifactId>    <version>2.10.5</version></dependency><dependency>

    <groupId>org.json4s</groupId>    <artifactId>json4s-jackson_2.10</artifactId>    <version>3.5.3</version></dependency><dependency>    <groupId>org.apache.kafka</groupId>    <artifactId>kafka_2.10</artifactId>    <version>0.8.2.1</version></dependency>为什么一直报错，救助！？

原文地址：https://www.cnblogs.com/dummyly/p/10025733.html