首先添加maven依赖：
<dependency><groupId>org.springframework.kafka</groupId><artifactId>spring-kafka</artifactId><version>2.8.11</version><exclusions><!--此处一定要排除kafka-clients，然后引入低版本client 不然后面分组消费功能会失效！--><exclusion><groupId>org.apache.kafka</groupId><artifactId>kafka-clients</artifactId></exclusion></exclusions></dependency><dependency><groupId>org.apache.kafka</groupId><artifactId>kafka-clients</artifactId><version>3.1.2</version></dependency>KafkaMessageListener.java
import lombok.extern.slf4j.Slf4j;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.kafka.annotation.TopicPartition;
import org.springframework.stereotype.Component;@Component
@Slf4j
public class KafkaMessageListener {@KafkaListener(topics = "test-sfk",groupId = "test")public void listen5(ConsumerRecord<String, String> message) {log.info("5------>Received message: {}", message.value());}@KafkaListener(topics = "test-sfk",groupId = "test")public void listen4(ConsumerRecord<String, String> message) {log.info("4------>Received message: {}", message.value());}
}
TestController.java 用于发送测试消息
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;@RestController
@RequestMapping("test")
public class TestController {@Autowiredprivate KafkaTemplate<String,Object> kafkaTemplate;@GetMapping("kafkaMessage")public String kafkaMessage(){for (int i = 0; i < 10; i++) {kafkaTemplate.send("test-sfk","test:"+i);}return "ok";}
}
启动后调用接口发送消息；此时看到控制台消息输出已经是均衡消费了
2024-03-15T13:49:01.034+08:00 INFO 19548 --- [ntainer#1-0-C-1] c.w.e.k.listener.KafkaMessageListener : 4------>Received message: test:0
2024-03-15T13:49:01.035+08:00 INFO 19548 --- [ntainer#1-0-C-1] c.w.e.k.listener.KafkaMessageListener : 4------>Received message: test:1
2024-03-15T13:49:01.035+08:00 INFO 19548 --- [ntainer#1-0-C-1] c.w.e.k.listener.KafkaMessageListener : 4------>Received message: test:2
2024-03-15T13:49:01.295+08:00 INFO 19548 --- [ntainer#0-0-C-1] c.w.e.k.listener.KafkaMessageListener : 5------>Received message: test:3
2024-03-15T13:49:01.297+08:00 INFO 19548 --- [ntainer#0-0-C-1] c.w.e.k.listener.KafkaMessageListener : 5------>Received message: test:4
2024-03-15T13:49:01.300+08:00 INFO 19548 --- [ntainer#0-0-C-1] c.w.e.k.listener.KafkaMessageListener : 5------>Received message: test:5
2024-03-15T13:49:01.301+08:00 INFO 19548 --- [ntainer#0-0-C-1] c.w.e.k.listener.KafkaMessageListener : 5------>Received message: test:6
2024-03-15T13:49:01.303+08:00 INFO 19548 --- [ntainer#0-0-C-1] c.w.e.k.listener.KafkaMessageListener : 5------>Received message: test:7
2024-03-15T13:49:01.304+08:00 INFO 19548 --- [ntainer#0-0-C-1] c.w.e.k.listener.KafkaMessageListener : 5------>Received message: test:8
2024-03-15T13:49:01.306+08:00 INFO 19548 --- [ntainer#0-0-C-1] c.w.e.k.listener.KafkaMessageListener : 5------>Received message: test:9一开始不知道，直接引用的spring-kafka依赖，然后就分组消费失败，始终只能被其中一个消费端消费，这里不知道是新版本配置有差异，还是就是新版kafka-clients跟SpringBoot3兼容有问题，特此记录！
