spring boot 与kafka集成的示例代码_Java教程

这里使用intellij idea

spring boot 与kafka集成的示例代码

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									<?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>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/> <!-- lookup parent from repository -->

									  </parent>

									  <properties>

									    <project.build.sourceencoding>utf-8</project.build.sourceencoding>

									    <project.reporting.outputencoding>utf-8</project.reporting.outputencoding>

									    <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>

									    </dependency>

									  </dependencies>

									  <build>

									    <plugins>

									      <plugin>

									        <groupid>org.springframework.boot</groupid>

									        <artifactid>spring-boot-maven-plugin</artifactid>

									      </plugin>

									    </plugins>

									  </build>

									</project>

项目中application.properties 添加

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									spring.kafka.bootstrap-servers=vm208:9092,vm:9092,vm50:9092

									spring.kafka.consumer.auto-offset-reset=latest

									spring.kafka.consumer.group-id=local_test

									spring.kafka.consumer.key-deserializer=org.apache.kafka.common.serialization.stringdeserializer

									spring.kafka.consumer.value-deserializer=org.apache.kafka.common.serialization.stringdeserializer

									spring.kafka.producer.key-serializer=org.apache.kafka.common.serialization.stringserializer

									spring.kafka.producer.value-serializer=org.apache.kafka.common.serialization.stringserializer

									spring.kafka.producer.acks=1

新建kafkaconsumer消费类

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									package com.example.demo.consumer;

									import org.apache.kafka.clients.consumer.consumerrecord;

									import org.slf4j.logger;

									import org.slf4j.loggerfactory;

									import org.springframework.kafka.annotation.kafkalistener;

									import org.springframework.stereotype.component;

									@component

									public class kafkaconsumer {

									  private logger logger = loggerfactory.getlogger(this.getclass());

									  @kafkalistener(topics = {"test"})

									  public void listen(consumerrecord<?, ?> record) {

									    system.out.printf("offset = %d,key =%s,value=%s\n", record.offset(), record.key(), record.value());

									  }

									}

启动spring-boot程序,在kafka集群,模拟发送topic,检验接收

复制代码代码如下:

	bin/kafka-console-producer.sh --broker-list    vm208:9092,vm210:9092,vm50:9092  --topic  test

编写producer代码

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									package com.example.demo.producer;

									import org.apache.kafka.clients.producer.producerrecord;

									import org.springframework.beans.factory.annotation.autowired;

									import org.springframework.kafka.core.kafkatemplate;

									import org.springframework.stereotype.component;

									@component

									public class kafkaproducer {

									  @autowired

									  private kafkatemplate kafkatemplate;

									  string topic="test";

									  public void sendmessage(string key,string data){

									    kafkatemplate.send(new producerrecord(topic,key,data));

									  }

									}

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

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									package com.example.demo.controller;

									import com.example.demo.producer.kafkaproducer;

									import org.springframework.beans.factory.annotation.autowired;

									import org.springframework.web.bind.annotation.requestmapping;

									import org.springframework.web.bind.annotation.requestmethod;

									import org.springframework.web.bind.annotation.requestparam;

									import org.springframework.web.bind.annotation.restcontroller;

									@restcontroller

									public class producercontroller {

									  @autowired

									  private kafkaproducer kafkaproducer;

									  @requestmapping(value = "/kafka/send.do", method = requestmethod.get)

									  public string sendmessage(@requestparam(value = "key") string key, @requestparam(value = "data") string data) {

									    kafkaproducer.sendmessage(key, data);

									    return "sucess";

									  }

									}