Flink-02 Flink Java 3分钟上手 Stream SingleOutputStreamOpe ExecutionEnvironment DataSet FlatMapFunction

<?xml version="1.0" encoding="UTF-8"?>
<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>flink-demo-01</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <flink.version>1.13.2</flink.version> <!-- 确保版本号正确 -->
        <scala.binary.version>2.12</scala.binary.version> <!-- 确保Scala版本正确 -->
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>
</artifactId>
            <version>${flink.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-streaming-java_${scala.binary.version}</artifactId>
            <version>${flink.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-clients_${scala.binary.version}</artifactId>
            <version>${flink.version}</version>
        </dependency>
    </dependencies>
</project>

StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

DataStreamSource<String> textStream = streamExecutionEnvironment.socketTextStream(ip, port, "\n");

SingleOutputStreamOperator<Tuple2<String, Long>> tuple2SingleOutputStreamOperator = textStream.flatMap(new FlatMapFunction<String, Tuple2<String, Long>>() {
    @Override
    public void flatMap(String s, Collector<Tuple2<String, Long>> collector) throws Exception {
        String[] splits = s.split("\\s");
        for (String word : splits) {
            collector.collect(Tuple2.of(word, 1L));
        }
    }
});

SingleOutputStreamOperator<Tuple2<String, Long>> word = tuple2SingleOutputStreamOperator
        .keyBy(new KeySelector<Tuple2<String, Long>, Object>() {
            @Override
            public Object getKey(Tuple2<String, Long> stringLongTuple2) throws Exception {
                return stringLongTuple2.f0;
            }
        })
        .window(SlidingProcessingTimeWindows.of(Time.seconds(5), Time.seconds(1)))
        .sum(1);

package icu.wzk.demo02;

import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.api.java.functions.KeySelector;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.api.windowing.assigners.SlidingProcessingTimeWindows;
import org.apache.flink.streaming.api.windowing.time.Time;
import org.apache.flink.util.Collector;

public class StartApp {

    public static void main(String[] args) throws Exception {
        String ip = "0.0.0.0";
        int port = 9999;
        StreamExecutionEnvironment streamExecutionEnvironment = StreamExecutionEnvironment.getExecutionEnvironment();
        DataStreamSource<String> textStream = streamExecutionEnvironment.socketTextStream(ip, port, "\n");
        SingleOutputStreamOperator<Tuple2<String, Long>> tuple2SingleOutputStreamOperator = textStream.flatMap(new FlatMapFunction<String, Tuple2<String, Long>>() {
            @Override
            public void flatMap(String s, Collector<Tuple2<String, Long>> collector) throws Exception {
                String[] splits = s.split("\\s");
                for (String word : splits) {
                    collector.collect(Tuple2.of(word, 1L));
                }
            }
        });
        SingleOutputStreamOperator<Tuple2<String, Long>> word = tuple2SingleOutputStreamOperator
                .keyBy(new KeySelector<Tuple2<String, Long>, Object>() {
                    @Override
                    public Object getKey(Tuple2<String, Long> stringLongTuple2) throws Exception {
                        return stringLongTuple2.f0;
                    }
                })
                .window(SlidingProcessingTimeWindows.of(Time.seconds(5), Time.seconds(1)))
                .sum(1);
        word.print();
        streamExecutionEnvironment.execute("stream!");
    }
}

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
4> (1,1)
4> (1,4)
2> (2,2)
4> (1,5)
4> (1,5)
2> (2,4)
2> (2,4)
3> (3,2)
4> (1,5)
1> (4,1)
2> (2,4)
3> (3,3)
4> (1,4)
1> (4,3)
3> (3,4)
4> (1,3)
1> (4,3)
2> (2,4)
2> (2,2)
3> (3,4)
4> (1,2)
1> (4,3)
3> (3,4)
4> (1,2)
1> (4,3)
3> (3,2)
4> (1,2)
1> (4,2)
3> (3,1)
4> (1,2)