Centos7安装netcat运算sparkStreaming进行单词统计

安装命令：

yum install nc

监听端口

 nc -l -k -p 6666

启动Sparkstreaming 程序

package streaming

import org.apache.spark.SparkConf
import org.apache.spark.streaming.dstream.DStream
import org.apache.spark.streaming.{Seconds, StreamingContext}

/**
  * spark streaming 处理socket数据
  */
object NetworkWordCount {
  def main(args: Array[String]): Unit = {

    val spar: SparkConf = new SparkConf().setMaster("local[2]").setAppName("NetworkWordCount")

    val ssc = new StreamingContext(spar,Seconds(5))
    val lines = ssc.socketTextStream("192.168.100.100",6666)

    val result: DStream[(String, Int)] = lines.flatMap(_.split(" ")).map((_,1)).reduceByKey(_+_)
    result.print()

    ssc.start()
    ssc.awaitTermination()


  }

}

 

在监听端口 输出单词以空格切割 ，才程序运行端查看结果