java操作kafka

maven依赖：

<dependency>
    <groupId>org.apache.kafka</groupId>
    <artifactId>kafka_2.11</artifactId>
    <version>0.9.0.0</version>
</dependency>

生产者：

package com.sniper.kafka.helloworld;

import java.util.Properties;

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

public class KafkaProducer {
    
    public static void main(String[] args) {
        Properties prop = new Properties();
        prop.setProperty("zookeeper.connect", "192.168.0.231:2181");
        prop.setProperty("serializer.class", StringEncoder.class.getName());
        prop.setProperty("metadata.broker.list", "192.168.0.231:9092");
        
        Producer<Integer, String> producer = new Producer<Integer, String>(new ProducerConfig(prop));
        
        for(int i=0; i<3; i++) {
            KeyedMessage<Integer, String> msg = new KeyedMessage<Integer, String>("test", "hi-" + i);
            producer.send(msg);
        }
        
        producer.close();
        
    }
    
}

消费者：

package com.sniper.kafka.helloworld;

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

import kafka.consumer.Consumer;
import kafka.consumer.ConsumerConfig;
import kafka.consumer.ConsumerIterator;
import kafka.consumer.KafkaStream;
import kafka.javaapi.consumer.ConsumerConnector;

public class KafkaConsumer {
    
    public static void main(String[] args) {
        Properties prop = new Properties();
        prop.setProperty("zookeeper.connect", "192.168.0.231:2181");
        prop.put("zk.connectiontimeout.ms", "1000000");  
        prop.setProperty("group.id", "group1");
        
        ConsumerConnector consumer = Consumer.createJavaConsumerConnector(new ConsumerConfig(prop));
        
        Map<String, Integer> map = new HashMap<String, Integer>();
        map.put("test", 1);
        
        Map<String, List<KafkaStream<byte[], byte[]>>> msgStreams = consumer.createMessageStreams(map);
        KafkaStream<byte[], byte[]> kafkaStreams = msgStreams.get("test").get(0);
        ConsumerIterator<byte[], byte[]> iterator = kafkaStreams.iterator();
        while(iterator.hasNext()) {
            String msg = new String(iterator.next().message());
            System.out.println(msg);
        }
    }
    
}