Flink实时读取Mysql数据库中增量日志数据_flink读取mysql增量

0.写在前面

项目地址（GitHub）：FlinkStreamETL
需求描述：利用Flink实时计算Mysql数据中的增量数据

方案：利用Canal实时读取Mysql数据库的Binlog日志，将其作为Kafka的生产者（Producer）；然后利用Flink作为kafka的消费者（Consumer），读取Kafka中的数据。目前只是读取kafka中的数据，为Json格式，后面需要根据业务需求编写实时计算逻辑

所用的版本 —>服务器：

Kafka：Kafka 2.1.0-cdh6.2.0

Flink：<flink.version>1.9.0</flink.version>

Java：<java.version>1.8</java.version>

所用的版本 —>本机上：

Flink：<flink.version>1.9.0</flink.version>

Scala：<scala.binary.version>2.12</scala.binary.version>

Java：<java.version>1.8</java.version>

Kafka：flink-connector-kafka_${scala.binary.version}（Scala版本是2.12）

---

1.创建Maven项目

mvn archetype:generate
	-DarchetypeGroupId=org.apache.flink 
	-DarchetypeArtifactId=flink-quickstart-java 
	-DarchetypeVersion=1.9.0 
	-DgroupId=flink-connector-kafka 
	-DartifactId=flink-connector-kafka 
	-Dversion=0.1 
	-Dpackage=myflink 
	-DinteractiveMode=false
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pom文件

<!--
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

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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>flink-connector-kafka</groupId>
	<artifactId>flink-connector-kafka</artifactId>
	<version>0.1</version>
	<packaging>jar</packaging>

	<name>Flink Quickstart Job</name>
	<url>http://www.myorganization.org</url>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<flink.version>1.9.0</flink.version>
		<java.version>1.8</java.version>
		<scala.binary.version>2.12</scala.binary.version>
		<maven.compiler.source>${java.version}</maven.compiler.source>
		<maven.compiler.target>${java.version}</maven.compiler.target>
	</properties>

	<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>

	<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-java</artifactId>
			<
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