java——spring boot集成kafka——spring boot集成kafka——消费者的配置细节

@KafkaListener(groupId = "testGroup", topicPartitions = {
@TopicPartition(topic = "topic1", partitions = {"0", "1"}),
@TopicPartition(topic = "topic2", partitions = "0",
partitionOffsets = @PartitionOffset(partition = "1",
initialOffset = "100"))
},concurrency = "3")//concurrency就是同组下的消费者个数，就是并发消费数，
建议⼩于等于分区总数
public void listenGroup(ConsumerRecord<String, String> record,
Acknowledgment ack) {
String value = record.value();
System.out.println(value);
System.out.println(record);
//⼿动提交offset
ack.acknowledge();
}