Flink:word count demo

最新推荐文章于 2024-11-23 11:35:43 发布

zhumingyuan111

最新推荐文章于 2024-11-23 11:35:43 发布

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分类专栏： flink

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flink 安装

单机安装flink非常简单，在官网下载flink,并执行安装包中bin文件下的start-cluster.sh即可，运行成功之后访问http://localhost:8081,会出现flink 的管理页面

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Wordcout 代码

import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.util.Collector;

public class WordCount {

    public static void main(String[] args) throws Exception {

        ExecutionEnvironment see = ExecutionEnvironment.getExecutionEnvironment();

        DataSet<String> text = see.fromElements("That last call is " +
            "necessary to start the actual Flink job. All operations, " +
            "such as creating sources, transformations a