1. 构建flink程序
一 建工程
1.使用 Intellij IDEA 创建一个 Maven 新项目
2. 勾选 Create from archetype，然后点击 Add Archetype 按钮
3. GroupId 中输入 org.apache.flink， ArtifactId 中输入 flink-quickstart-scala，Version 中输入 1.10.0，然后点击 OK
4. 点击向右箭头，出现下拉列表，选中 flink-quickstart-scala:1.10.0，点击 Next
5. Name 中输入 FlinkTutorial， GroupId 中输入 com.atguigu， ArtifactId 中输入FlinkTutorial，点击 Next
6. 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 .
二 添加pom文件
确保pom.xml文件中有如下内容:
<!-- Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. --> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.example</groupId> <artifactId>myflink</artifactId> <version>1.0-SNAPSHOT</version> <packaging>jar</packaging> <name>Flink Quickstart Job</name> <url>http://www.myorganization.org</url> <repositories> <repository> <id>apache.snapshots</id> <name>Apache Development Snapshot Repository</name> <url>https://repository.apache.org/content/repositories/snapshots/</url> <releases> <enabled>false</enabled> </releases> <snapshots> <enabled>true</enabled> </snapshots> </repository> </repositories> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <flink.version>1.10.0</flink.version> <scala.binary.version>2.11</scala.binary.version> <scala.version>2.11.12</scala.version> </properties> <dependencies> <!-- Apache Flink dependencies --> <!-- These dependencies are provided, because they should not be packaged into the JAR file. --> <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-scala_${scala.binary.version}</artifactId> <version>${flink.version}</version> <!-- <scope>provided</scope>--> </dependency> <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-streaming-scala_${scala.binary.version}</artifactId> <version>${flink.version}</version> <!-- <scope>provided</scope>--> </dependency> <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-cep-scala_${scala.binary.version}</artifactId> <version>${flink.version}</version> </dependency> <!-- Scala Library, provided by Flink as well. --> <dependency> <groupId>org.scala-lang</groupId> <artifactId>scala-library</artifactId> <version>${scala.version}</version> <!-- <scope>provided</scope>--> </dependency> <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-table-api-scala-bridge_2.11</artifactId> <version>1.10.0</version> <!-- <scope>provided</scope>--> </dependency> <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-table-planner_2.11</artifactId> <version>1.10.0</version> <!-- <scope>provided</scope>--> </dependency> <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-table-planner-blink_2.11</artifactId> <version>1.10.0</version> <!-- <scope>provided</scope>--> </dependency> <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-table-common</artifactId> <version>1.10.0</version> <!-- <scope>provided</scope>--> </dependency> <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-csv</artifactId> <version>1.10.0</version> </dependency> <dependency> <groupId>org.apache.bahir</groupId> <artifactId>flink-connector-redis_2.11</artifactId> <version>1.0</version> </dependency> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>2.8.1</version> </dependency> <!-- Add connector dependencies here. They must be in the default scope (compile). --> <!-- Example: <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-connector-kafka-0.10_${scala.binary.version}</artifactId> <version>${flink.version}</version> </dependency> --> <!-- Add logging framework, to produce console output when running in the IDE. --> <!-- These dependencies are excluded from the application JAR by default. --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.7.7</version> <scope>runtime</scope> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> <scope>runtime</scope> </dependency> </dependencies> <build> <plugins> <!-- We use the maven-shade plugin to create a fat jar that contains all necessary dependencies. --> <!-- Change the value of <mainClass>...</mainClass> if your program entry point changes. --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-shade-plugin</artifactId> <version>3.1.1</version> <executions> <!-- Run shade goal on package phase --> <execution> <phase>package</phase> <goals> <goal>shade</goal> </goals> <configuration> <artifactSet> <excludes> <exclude>org.apache.flink:force-shading</exclude> <exclude>com.google.code.findbugs:jsr305</exclude> <exclude>org.slf4j:*</exclude> <exclude>log4j:*</exclude> </excludes> </artifactSet> <filters> <filter> <!-- Do not copy the signatures in the META-INF folder. Otherwise, this might cause SecurityExceptions when using the JAR. --> <artifact>*:*</artifact> <excludes> <exclude>META-INF/*.SF</exclude> <exclude>META-INF/*.DSA</exclude> <exclude>META-INF/*.RSA</exclude> </excludes> </filter> </filters> <transformers> <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer"> <mainClass>com.atguigu.andy.WordCountFromBatch</mainClass> </transformer> </transformers> </configuration> </execution> </executions> </plugin> <!-- Java Compiler --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.1</version> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> <!-- Scala Compiler --> <plugin> <groupId>net.alchim31.maven</groupId> <artifactId>scala-maven-plugin</artifactId> <version>3.2.2</version> <executions> <execution> <goals> <goal>compile</goal> <goal>testCompile</goal> </goals> </execution> </executions> <configuration> <args> <arg>-nobootcp</arg> </args> </configuration> </plugin> <!-- Eclipse Scala Integration --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-eclipse-plugin</artifactId> <version>2.8</version> <configuration> <downloadSources>true</downloadSources> <projectnatures> <projectnature>org.scala-ide.sdt.core.scalanature</projectnature> <projectnature>org.eclipse.jdt.core.javanature</projectnature> </projectnatures> <buildcommands> <buildcommand>org.scala-ide.sdt.core.scalabuilder</buildcommand> </buildcommands> <classpathContainers> <classpathContainer>org.scala-ide.sdt.launching.SCALA_CONTAINER</classpathContainer> <classpathContainer>org.eclipse.jdt.launching.JRE_CONTAINER</classpathContainer> </classpathContainers> <excludes> <exclude>org.scala-lang:scala-library</exclude> <exclude>org.scala-lang:scala-compiler</exclude> </excludes> <sourceIncludes> <sourceInclude>**/*.scala</sourceInclude> <sourceInclude>**/*.java</sourceInclude> </sourceIncludes> </configuration> </plugin> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>build-helper-maven-plugin</artifactId> <version>1.7</version> <executions> <!-- Add src/main/scala to eclipse build path --> <execution> <id>add-source</id> <phase>generate-sources</phase> <goals> <goal>add-source</goal> </goals> <configuration> <sources> <source>src/main/scala</source> </sources> </configuration> </execution> <!-- Add src/test/scala to eclipse build path --> <execution> <id>add-test-source</id> <phase>generate-test-sources</phase> <goals> <goal>add-test-source</goal> </goals> <configuration> <sources> <source>src/test/scala</source> </sources> </configuration> </execution> </executions> </plugin> </plugins> </build> </project>
三 编写程序
package org.example.number1
import org.apache.flink.api.scala._
/**
* 这是批处理
*/
object BlockWorldCount {
def main(args: Array[String]): Unit = {
val env = ExecutionEnvironment.getExecutionEnvironment //创建环境
val input =
env.readTextFile("E:\\work\\java\\idae\\myflink\\src\\main\\resources\\data1") //读取文件
val value =
input.flatMap(_.split(" ")) //计算wordcount
.map((_, 1))
.groupBy(0)
.sum(1)
value.print()
}
}
下面的流处理
package org.example.number1
import org.apache.flink.streaming.api.scala._ //注意这里需要用_,把该包的所有导入,因为有隐式转换
import org.apache.flink.streaming.api.windowing.time.Time
object WordCount {
def main(args: Array[String]): Unit = {
//获取env
val env = StreamExecutionEnvironment.getExecutionEnvironment
//添加源
val inputstream =
env.socketTextStream("xiaoai07", 9999, '\n')
val windowCounts = inputstream.flatMap(_.split(" "))
.map((_, 1))
.keyBy(0) //分组
.timeWindow(Time.seconds(5))//开一个5秒的窗口
.sum(1) // 统计
windowCounts.print()
}
}
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