java利用kafka生产消费消息

package com.test.frame.kafka.controller;

import kafka.javaapi.producer.Producer;
import kafka.producer.KeyedMessage;
import kafka.producer.ProducerConfig;

import java.util.Properties;

public class KafkaProducer {

private final Producer<String, String> producer;
public final static String TOPIC = "my-multi-topic";

//构造方法
private KafkaProducer() {
Properties props = new Properties();
props.put("metadata.broker.list", "localhost:9092");
props.put("serializer.class", "kafka.serializer.StringEncoder");
props.put("key.serializer.class", "kafka.serializer.StringEncoder");

props.put("request.required.acks", "-1");
producer = new Producer<String, String>(new ProducerConfig(props));
}

void produce() {
int messageNo = 90;
final int COUNT = 100;

while (messageNo < COUNT) {
String key = String.valueOf(messageNo);
String data = "hello kafka message" + key;

producer.send(new KeyedMessage<String, String>(TOPIC, key ,data));
System.out.println(data);
messageNo++;
}
}

public static void main(String[] args) throws Exception {

new KafkaProducer().produce();
}

}

package com.test.frame.kafka.controller;

import kafka.consumer.ConsumerConfig;
import kafka.consumer.ConsumerIterator;
import kafka.consumer.KafkaStream;
import kafka.javaapi.consumer.ConsumerConnector;
import kafka.serializer.StringDecoder;
import kafka.utils.VerifiableProperties;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;

public class KafkaConsumer {
private final ConsumerConnector consumer;

private KafkaConsumer() {

Properties props = new Properties();
//zookeeper 配置
props.put("zookeeper.connect", "localhost:2181");

//group 代表一个消费组
props.put("group.id", "jd-group");

//zk连接超时
props.put("zookeeper.session.timeout.ms", "4000");
props.put("zookeeper.sync.time.ms", "200");
props.put("auto.commit.interval.ms", "1000");
props.put("auto.offset.reset", "smallest");
//序列化类
props.put("serializer.class", "kafka.serializer.StringEncoder");

ConsumerConfig config = new ConsumerConfig(props);

consumer = kafka.consumer.Consumer.createJavaConsumerConnector(config);
}

void consume() {
Map<String, Integer> topicCountMap = new HashMap<String, Integer>();
topicCountMap.put(KafkaProducer.TOPIC, new Integer(1));

StringDecoder keyDecoder = new StringDecoder(new VerifiableProperties());
StringDecoder valueDecoder = new StringDecoder(new VerifiableProperties());

Map<String, List<KafkaStream<String, String>>> consumerMap =
consumer.createMessageStreams(topicCountMap,keyDecoder,valueDecoder);
KafkaStream<String, String> stream = consumerMap.get(KafkaProducer.TOPIC).get(0);
ConsumerIterator<String, String> it = stream.iterator();
while (it.hasNext())
System.out.println(it.next().message());
}

public static void main(String[] args) {
new KafkaConsumer().consume();
}

}