Kafka使用Java客户端进行访问的示例代码

<dependency>  <groupId>org.apache.kafka</groupId>  <artifactId>kafka-clients</artifactId>  <version>0.9.0.1</version></dependency>

package com.lnho.example.kafka;import org.apache.kafka.clients.producer.KafkaProducer;import org.apache.kafka.clients.producer.Producer;import org.apache.kafka.clients.producer.ProducerRecord;import java.util.Properties;public class KafkaProducerExample {  public static void main(String[] args) {    Properties props = new Properties();    props.put("bootstrap.servers", "master:9092");    props.put("acks", "all");    props.put("retries", 0);    props.put("batch.size", 16384);    props.put("linger.ms", 1);    props.put("buffer.memory", 33554432);    props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");    props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");    Producer<String, String> producer = new KafkaProducer<>(props);    for(int i = 0; i < 100; i++)      producer.send(new ProducerRecord<>("topic1", Integer.toString(i), Integer.toString(i)));    producer.close();  }}

package com.lnho.example.kafka;import org.apache.kafka.clients.consumer.ConsumerRecord;import org.apache.kafka.clients.consumer.ConsumerRecords;import org.apache.kafka.clients.consumer.KafkaConsumer;import java.util.Arrays;import java.util.Properties;public class KafkaConsumerExample {  public static void main(String[] args) {    Properties props = new Properties();    props.put("bootstrap.servers", "master:9092");    props.put("group.id", "test");    props.put("enable.auto.commit", "true");    props.put("auto.commit.interval.ms", "1000");    props.put("session.timeout.ms", "30000");    props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");    props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");    KafkaConsumer<String, String> consumer = new KafkaConsumer<>(props);    consumer.subscribe(Arrays.asList("topic1"));    while (true) {      ConsumerRecords<String, String> records = consumer.poll(100);      for (ConsumerRecord<String, String> record : records)        System.out.printf("offset = %d, key = %s, value = %s/n", record.offset(), record.key(), record.value());    }  }}