spring boot 与kafka集成的示例代码

新建春季靴子项目

这里使用Intellij Idea

添加kafka集成

<？xml版本=“ 1.0” conding =“ utf-8”？> <project xmlns =“ http://maven.apache.org/pom/4.0.0.0” xmlns：xsi =“ 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>com.example</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>demo</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.8.RELEASE</version> <relativePath/> <!--来自存储库的查找父 - > </parth> <properies> <project.build.sourceencoding> utf-8 </project.build.build.sourceencoding> <project.reporting.outputenconcoding.outputencodencoding> utf-8 </project.reporting.reporting.outputence.outputencecodenciie> <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-test </artifactid> <scope> <scope> test </scope> </deverency> </distionency> </distionencies> </disporencies> <plugins> <plugins> <plugin> <plugin> <gropsId> <groupId> <groupId> org.springfringfringfregringfrage.boot> <Artifactid> spring-boot-maven-plugin </artifactid> </plugin> </plugins> </build> </project> </project>

项目中application.properties添加

spring.kafka.bootstrap-servers = VM208：9092，VM：9092，VM50：9092SPRING.KAFKA.CONSUMER.AUTO offset-reset-reset-reset-reset-reset-reset-reset-reset = exatssspring.kafka.consumer.consumer.group.group-id = l ocal_testspring.kafka.consumer.key-deserializer = org.apache.kafka.common.serialization.stringdeserializerspring.kafka.consumer.value-deseri alizer = org.apache.kafka.common.serialization.stringDeserializerspring.kafka.producer.key-serialializer = org.apache.kafkace.kafka.common.serialization .stringserializerspring.kafka.producer.value-serializer = org.apache.kafka.common.serialization.stringserializerspring.kafka.producer.acks.acks = 1

新建kafkaconsumer消费类

包com.example.demo.consumer; import org.apache.kafka.clients.consumer.consumerrecord; import org.slf4j.logger; import org.slf4j.loggerfactory; import org org.springframework.stereotype.component; @componentPublic类kafkaconsumer {private logger logger = loggerfactory.getlogger（this.getClass（））; @kafkalistener（topics = {“ test”}）public void listing（computerRecord <？，？> record）{system.out.out.printf（“ offset =％d，key =％s，value =％s/n”，record.offse.offset（），record.key（），record.key（），record.value（value（））; }}}

spring-boot程序，在kafka集群，模拟发送主题，检验接收

复制代码代码如下：bin/kafka-console-producer.sh-经纪列表VM208：9092，VM210：9092，VM50：9092-主题测试

编写生产商代码

软件包com.example.demo.producer; import org.apache.kafka.clients.producer.producercord; import org.springframework.beans.beans.beans.factory.annotatory.antowired.autowired; import org.springFringframeWork.kafka.kafka.kafka.kafka.kafkafkafkatemplate; org.springframework.stereotype.component; @componentPublic类kafkaproducer {@autowired private kafkatemplate kafkatemplate kafkatemplate;字符串主题=“ test”; public void sendmessage（字符串键，字符串数据）{kafkatemplate.send（new ProducerErcord（topic，key，data））; }}}

建立一个RESTFUL模拟发送（//http://localhost:8080/kafka/send.do?key=2&data=allen-test-message）

软件包com.example.demo.controller; import com.example.demo.producer.kafkaproducer; import org.springframework.beans.beans.factory.annotation.Antotation.Autowired; import org.springframework.springframework.web.bind.annot.annot.bind.bind.bind.requestation.requestmappation.requestmappation; emptmapping; import.requestmapping; import; import; org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.RestController;@RestControllerpublic class ProducerController { @Autowired private KafkaProducer kafkaproducer; @requestmapping（value =“/kafka/send.do”，method = requestMethod.get）public string sendmessage（@requestparam（ @requestParam（value =“ key”）字符串键，@requestParam（ @requestParam（value =“ data data”）字符串数据）{返回“成功”； }}}

spring-kafka大大减少了代码工作量。

官方文档：https：//docs.spring.io/spring-kafka/docs/1.2.2.2.2.release/reference/html/

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