springboot集成kafka

首先启动kafka。注意要修改配置文件 打开远程控制

1.创建springboot工程并引入kafka依赖

 <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka</artifactId>
</dependency>

2.在主配置文件里进行kafka的配置

#============== kafka ===================
# 指定kafka 代理地址，可以多个
spring.kafka.bootstrap-servers=192.168.231.128:9092

#=============== provider  =======================
spring.kafka.producer.retries=0
# 每次批量发送消息的数量
spring.kafka.producer.batch-size=16384
spring.kafka.producer.buffer-memory=33554432

# 指定消息key和消息体的编解码方式
spring.kafka.producer.key-serializer=org.apache.kafka.common.serialization.StringSerializer
spring.kafka.producer.value-serializer=org.apache.kafka.common.serialization.StringSerializer

#=============== consumer  =======================
# 指定默认消费者group id
spring.kafka.consumer.group-id=test-hello-group

spring.kafka.consumer.auto-offset-reset=earliest
spring.kafka.consumer.enable-auto-commit=true
spring.kafka.consumer.auto-commit-interval=100

# 指定消息key和消息体的编解码方式
spring.kafka.consumer.key-deserializer=org.apache.kafka.common.serialization.StringDeserializer
spring.kafka.consumer.value-deserializer=org.apache.kafka.common.serialization.StringDeserializer

3.编写提供者

@Component
public class KafkaProvider {

    @Autowired
    private KafkaTemplate kafkaTemplate;

    public void sendMessage() {
        kafkaTemplate.send("codesheep", "hello kafka");
    }
}

4.编写消费者

@Component
public class KafkaConsumer {
	//这里的topic名要与发送那里保持一致
    @KafkaListener(topics = {"codesheep"})
    public void receive(ConsumerRecord consumerRecord) {
        System.out.println("consumer is invoker");
        String topic = consumerRecord.topic();
        String value = (String) consumerRecord.value();
        System.out.println("value   " + value);
        System.out.println(topic);
    }
}