本文已参与「新人创作礼」活动，一起开启掘金创作之路。
1.启动kafka
创建topic:
[root@localhost kafka_2.12-2.1.0]# bin/kafka-topics.sh --create --zookeeper 192.168.184.128:2181 --replication-factor 1 --partitions 1 --topic springboot-topic
2.创建springboot项目：
3.pom文件：
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<!-- springboot-kafka -->
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
4.application.properties：
spring.kafka.bootstrap-servers=192.168.184.128:9092
spring.kafka.consumer.group-id=0
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.batch-size=16384
spring.kafka.producer.buffer-memory=33554432
spring.kafka.producer.acks=all
spring.kafka.producer.retries=0
5.生产者：
package com.wyh;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.stereotype.Component;
//发送消息
@Component
public class KafkaSender {
@Autowired
private KafkaTemplate<String, String> kafkaTemplate;
public void sendChannelMess(String topic, String message) {
kafkaTemplate.send(topic, message);
}
}
6.消费者：
package com.wyh;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.stereotype.Component;
//消费者
@Component
public class KafkaConsumer {
//消费者不需要调用，会自己监听topic，然后监听的消息就是参数message
@KafkaListener(topics = {"springboot-topic"})
public void receiveMessage(String message) {
System.out.println(message);
}
}
7.测试类：
package com.wyh;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
//测试类
@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringbootKafkaApplication.class)
public class KafkaTest {
@Autowired
private KafkaSender sender;
@Test
public void myTest() {
sender.sendChannelMess("springboot-topic", "test-springboot-kafka-message");
}
}
8.启动消费者：
run on server:
9.启动测试类，发送消息
10.切换至consumer类，查看控制台，已打印出刚才发送的消息：
测试成功。
