三、IDEA Springboot Flink 项目创建

1.新建一个空的Maven项目



2.填入项目名



3.选择项目位置,完成

4.在pom.xml中引入依赖


    
        org.apache.flink
        flink-clients_2.12
        1.9.1
    

    
    
        org.apache.flink
        flink-streaming-java_2.12
        1.9.1
        provided
    

5.在resource目录下新增日志文件(参考官方日志)
log4j.properties

################################################################################
#  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.
################################################################################

log4j.rootLogger=INFO, console

log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%d{HH:mm:ss,SSS} %-5p %-60c %x - %m%n

logback.xml




    
        
            %d{HH:mm:ss.SSS} [%thread] %-5level %logger{60} %X{sourceThread} - %msg%n
        
    

    
        
    

6.在java目录下新建测试程序
官方example-SocketWindowWordCount

/*
 * 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.
 */

package org.apache.flink.streaming.examples.socket;

import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.api.common.functions.ReduceFunction;
import org.apache.flink.api.java.utils.ParameterTool;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.api.windowing.time.Time;
import org.apache.flink.util.Collector;

/**
 * Implements a streaming windowed version of the "WordCount" program.
 *
 * 

This program connects to a server socket and reads strings from the socket. * The easiest way to try this out is to open a text server (at port 12345) * using the netcat tool via *

 * nc -l 12345 on Linux or nc -l -p 12345 on Windows
 * 
* and run this example with the hostname and the port as arguments. */ @SuppressWarnings("serial") public class SocketWindowWordCount { public static void main(String[] args) throws Exception { // the host and the port to connect to final String hostname; final int port; try { final ParameterTool params = ParameterTool.fromArgs(args); hostname = params.has("hostname") ? params.get("hostname") : "localhost"; port = params.getInt("port"); } catch (Exception e) { System.err.println("No port specified. Please run 'SocketWindowWordCount " + "--hostname --port ', where hostname (localhost by default) " + "and port is the address of the text server"); System.err.println("To start a simple text server, run 'netcat -l ' and " + "type the input text into the command line"); return; } // get the execution environment final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(); // get input data by connecting to the socket DataStream text = env.socketTextStream(hostname, port, "\n"); // parse the data, group it, window it, and aggregate the counts DataStream windowCounts = text .flatMap(new FlatMapFunction() { @Override public void flatMap(String value, Collector out) { for (String word : value.split("\\s")) { out.collect(new WordWithCount(word, 1L)); } } }) .keyBy("word") .timeWindow(Time.seconds(5)) .reduce(new ReduceFunction() { @Override public WordWithCount reduce(WordWithCount a, WordWithCount b) { return new WordWithCount(a.word, a.count + b.count); } }); // print the results with a single thread, rather than in parallel windowCounts.print().setParallelism(1); env.execute("Socket Window WordCount"); } // ------------------------------------------------------------------------ /** * Data type for words with count. */ public static class WordWithCount { public String word; public long count; public WordWithCount() {} public WordWithCount(String word, long count) { this.word = word; this.count = count; } @Override public String toString() { return word + " : " + count; } } }

7.打包,在D:\projects-flink\myflink\target下可以看到myflink-1.0-SNAPSHOT.jar,简单项目搭建完成


image.png

8.完整的项目结构


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