Kafka指定分区和offset消费。

消费者：

public class DConsumer {    public static void main(String[] args) {        Properties prop = new Properties();        prop.put("bootstrap.servers","node:9092");        prop.put("group.id","test8");        prop.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");        prop.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");//如果是之前存在的group.id        Consumer consumer = new KafkaConsumer(prop);        TopicPartition p = new TopicPartition("test2",2);//        指定消费topic的那个分区        consumer.assign(Arrays.asList(p));//        指定从topic的分区的某个offset开始消费//        consumer.seekToBeginning(Arrays.asList(p));        consumer.seek(p,5);//        consumer.subscribe(Arrays.asList("test2"));//如果是之前不存在的group.id//        Map<TopicPartition, OffsetAndMetadata> hashMaps = new HashMap<TopicPartition, OffsetAndMetadata>();//        hashMaps.put(new TopicPartition("test2", 0), new OffsetAndMetadata(0));//        consumer.commitSync(hashMaps);//        consumer.subscribe(Arrays.asList("test2"));        while (true) {            ConsumerRecords<String, String> c = consumer.poll(100);            for(ConsumerRecord<String, String> c1: c) {                System.out.println("Key: " + c1.key() + " Value: " + c1.value() + " Offset: " + c1.offset() + " Partitions: " + c1.partition());            }        }    }}