|NO.Z.00011|——————————|BigDataEnd|——|Hadoop&kafka.V11|——|kafka.v11|spring_kafka实战.v01|

一、SpringBoot_kafka实战：SpringBoot Kafka

### --- 创建spring_boot模块

~~~     ——>在kafka_demo右键——>new module——>Spring Initializr——>Next
~~~     ——>填写NewModule信息——>Next
~~~     ——>依赖的选择——>选择web和kafka——>Next
~~~     ——>FINISH

二、依赖properties配置

### --- 配置pom.xml依赖文件

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.4</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.yanqi.kafka.demo</groupId>
    <artifactId>demo-02-springboot-kafka</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo-02-springboot-kafka</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

### --- 若是下载失败：spring-boot-maven-plugin

~~~     # 添加对应版本号就可下载
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.3.4.RELEASE</version>
            </plugin>
        </plugins>
    </build>

### --- 查看spring_boot和kafka的版本
### --- 配置application.properties

spring.application.name=springboot-kafka-02
server.port=8080

# kafka的配置
spring.kafka.bootstrap-servers=node1:9092

#producer配置
spring.kafka.producer.key-serializer=org.apache.kafka.common.serialization.IntegerSerializer
spring.kafka.producer.value-serializer=org.apache.kafka.common.serialization.StringSerializer
# 生产者每个批次最多放多少条记录
spring.kafka.producer.batch-size=16384
# 生产者一端总的可用发送缓冲区大小，此处设置为32MB
spring.kafka.producer.buffer-memory=33554432

#consumer配置
spring.kafka.consumer.key-deserializer=org.apache.kafka.common.serialization.IntegerDeserializer
spring.kafka.consumer.value-deserializer=org.apache.kafka.common.serialization.StringDeserializer
spring.kafka.consumer.group-id=springboot-consumer02
# 如果在kafka中找不到当前消费者的偏移量，则直接将偏移量重置为最早的
spring.kafka.consumer.auto-offset-reset=earliest
# 消费者的偏移量是自动提交还是手动提交，此处自动提交偏移量
spring.kafka.consumer.enable-auto-commit=true
# 消费者偏移量自动提交的时间间隔
spring.kafka.consumer.auto-commit-interval=1000

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Walter Savage Landor:strove with none,for none was worth my strife.Nature I loved and, next to Nature, Art:I warm'd both hands before the fire of life.It sinks, and I am ready to depart

                                                                                                                                                   ——W.S.Landor

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