kafka生产者、消费者示例

package com.kafka.demo;
import java.util.Arrays;
import java.util.Properties;
import org.apache.kafka.clients.consumer.Consumer;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.common.serialization.StringDeserializer;

public class SomeConsumer {
	
	public static void main(String[] args) {
		Properties props = new Properties();
		props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,
				"192.168.23.71:9092,192.168.23.72:9092,192.168.23.73:9092");
		props.put(ConsumerConfig.GROUP_ID_CONFIG, "test");
		props.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, "true");
		props.put(ConsumerConfig.AUTO_COMMIT_INTERVAL_MS_CONFIG, "1000");
		props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
		props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
		Consumer consumer = new KafkaConsumer<>(props);
		consumer.subscribe(Arrays.asList("vehicleData"));
		while (true) {
			ConsumerRecords records = consumer.poll(100);
			for (ConsumerRecord record : records) {
				System.out.printf("offset = %d, key = %s, value = %s%n", record.offset(), record.key(), record.value());
			}
		}
	}

}

package com.kafka.demo;

import java.util.Properties;

import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerRecord;

public class SendMessage1 {

	public static void main(String[] args) {
		// 创建生产者
		Properties kafkaProps = new Properties();
		// 指定broker（这里指定了2个，1个备用），如果你是集群更改主机名即可，如果不是只写运行的主机名
		kafkaProps.put("bootstrap.servers", "192.168.23.71:9092,192.168.23.72:9092,192.168.23.73:9092");
		//kafkaProps.put("group.id", "CountryCounter");	// 消费者群组
		// 设置序列化（自带的StringSerializer，如果消息的值为对象，就需要使用其他序列化方式，如Avro ）
		kafkaProps.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
		kafkaProps.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
		
		// 实例化出producer
		KafkaProducer producer = new KafkaProducer(kafkaProps);
		
		// 创建ProducerRecord对象
		ProducerRecord  record = new ProducerRecord("vehicleData",
				"Hello", "Kafka222");
		try {
			// 发送消息
			producer.send(record);
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			producer.close();
		}
	}

}