spark--transform算子--union

import org.apache.spark.{SparkConf, SparkContext}

/**
  * Created by liupeng on 2017/6/16.
  */
object T_union {
  System.setProperty("hadoop.home.dir","F:\\hadoop-2.6.5")

  def main(args: Array[String]): Unit = {
    val conf = new SparkConf().setAppName("union_test").setMaster("local")
    val sc = new SparkContext(conf)

    var rdd = sc.parallelize(1 to 5, 1)
    var rdd1 = sc.parallelize(4 to 7, 1)

    //union方法可以合并两个RDD，但是不去重，仅仅合并而已
    val sum = rdd.union(rdd1)
      .foreach(println)
  }
}

运行结果：

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5

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