Kafka使用Java客户端进行访问的示例代码

本文环境如下：

操作系统：centos 6 32位

jdk版本：1.8.0_77 32位

kafka版本：0.9.0.1(scala 2.11)

1. maven依赖包

<dependency>
  <groupid>org.apache.kafka</groupid>
  <artifactid>kafka-clients</artifactid>
  <version>0.9.0.1</version>
</dependency>

2. 生产者代码

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();
  }
}

3. 消费者代码

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());
    }
  }
}

4. 执行程序

lib底下需要有：kafka-clients-0.9.0.1.jar log4j-1.2.17.jar slf4j-api-1.7.6.jar slf4j-log4j12-1.7.6.jar

生产者:

java -classpath kafka-example-1.0-snapshot.jar:lib/* com.lnho.example.kafka.kafkaproducerexample

消费者:

java -classpath kafka-example-1.0-snapshot.jar:lib/* com.lnho.example.kafka.kafkaconsumerexample

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。