Flink Batch File Word Count

POM文件

    <dependencies>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-scala_2.11</artifactId>
            <version>1.10.2</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.flink/flink-streaming-scala -->
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-streaming-scala_2.11</artifactId>
            <version>1.10.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-connector-kafka-0.11_2.11</artifactId>
            <version>1.10.1</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <!-- 该插件用于将Scala 代码编译成class 文件-->
            <plugin>
                <groupId>net.alchim31.maven</groupId>
                <artifactId>scala-maven-plugin</artifactId>
                <version>3.4.6</version>
                <executions>
                    <execution>
                        <!-- 声明绑定到maven 的compile 阶段-->
                        <goals>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
                <version>3.0.0</version>
                <configuration>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                </configuration>
                <executions>
                    <execution>
                        <id>make-assembly</id>
                        <phase>package</phase>
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

源码:

package com.kpwong.wc

import org.apache.flink.api.scala.ExecutionEnvironment
import org.apache.flink.api.scala._


//批处理的wordcount
object wordCount {
  def main(args: Array[String]): Unit = {

    //创建一个批处理执行环境
    val env: ExecutionEnvironment = ExecutionEnvironment.getExecutionEnvironment

    //从文件中读取数据
    val inputPath = "G:\flinkdemo\FlinkTutorial\src\main\resources\hello.txt"

    val inputDataSet: DataSet[String] = env.readTextFile(inputPath)

    val resultDS: AggregateDataSet[(String, Int)] = inputDataSet.flatMap(_.split(" ")).map((_,1)).groupBy(0).sum(1)

    resultDS.print()
  }
}