spark与flink的wordcount示例

spark的wordcount示例:

package spark

import org.apache.spark._

object TestSparkWordCount {
  def main(args: Array[String]): Unit = {
    val sc = new SparkContext(new SparkConf().setAppName("wordcount").setMaster("local[*]"))
//    hello scala
//    hello spark
    val rdd = sc.textFile("src/main/resources/test.txt")
    val wordCount = rdd.flatMap(line => line.split(" "))
      .map(word => (word, 1))
      .reduceByKey((a, b) => (a + b))
    wordCount.foreach(println)
//    (spark,1)
//    (scala,1)
//    (hello,2)
  }

}

flink的wordcount示例:

package com.pinko.testcase

import org.apache.flink.streaming.api.scala.StreamExecutionEnvironment
import org.apache.flink.api.scala._
object StreamWordCount {
  def main(args: Array[String]): Unit = {
    val env = StreamExecutionEnvironment.getExecutionEnvironment
    env.setParallelism(1)
//    hello world
//    hello flink
    val text = env.readTextFile("src/main/resources/output/1.txt")
    val result = text.flatMap(_.split(" "))
      .map((_, 1))
      .keyBy(0)
      .sum(1)
    result.print("result")
    env.execute("StreamWordCount")
//    result> (hello,1)
//    result> (world,1)
//    result> (hello,2)
//    result> (flink,1)
  }

}