本项目使用的Flink版本为最新版本，也就是1.11.2。现在提供maven项目的配置文件。
使用Intellij IDEA创建一个Maven新项目 勾选Create from archetype，然后点击Add Archetype按钮 GroupId中输入org.apache.flink，ArtifactId中输入flink-quickstart-scala，Version中输入1.11.2，然后点击OK 点击向右箭头，出现下拉列表，选中flink-quickstart-scala:1.11.2（同理构建java项目就是将scala改成java），点击Next Name中输入FlinkTest，GroupId中输入com.zhengkw，ArtifactId中输入FlinkTest，点击Next 最好使用IDEA默认的Maven工具：Bundled（Maven 3），点击Finish，等待一会儿，项目就创建好了 根据情况修改pom文件，因为我这边用的是scala2.12.12，所以我将pom做了一些修改
<properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <flink.version>1.11.2</flink.version> <scala.binary.version>2.12</scala.binary.version> <scala.version>2.12.12</scala.version> <log4j.version>2.12.1</log4j.version> </properties>编写WordCount.scala程序
package com.imprexion import org.apache.flink.api.scala._ import org.apache.flink.streaming.api.scala.{DataStream, StreamExecutionEnvironment} /** * @ClassName:WorldCount * @author: zhengkw * @description: * @date: 20/10/22上午 11:13 * @version:1.0 * @since: jdk 1.8 scala 2.11.8 */ object WorldCount { def main(args: Array[String]): Unit = { // set up the streaming execution environment val env = StreamExecutionEnvironment.getExecutionEnvironment env.setParallelism(1) val text: DataStream[String] = env.readTextFile("E:\\IdeaWorkspace\\Flink-DataMoveForHive2Kafka\\src\\main\\resources\\helloworld.txt") val value = text.flatMap { r => r.split("\\s") } .map(w => WordWithCount(w, 1)) // 使用word字段进行分组操作，也就是shuffle .keyBy(0) // 做聚合操作，类似与reduce .sum(1).print() env.execute() } case class WordWithCount(word: String, count: Int) }【Flink scala】No implicits found for parameter evidence$12 官网说明
1：A frequent reason if that the code that generates the TypeInformation has not been imported. Make sure to import the entire flink.api.scala package.
2：Another common cause are generic methods, which can be fixed as described in the following section.
原因：当前环境之下找到不到scala的包
添加：
import org.apache.flink.api.scala._ 即可
