依賴

        <dependency>
            <groupId>org.apache.kafka</groupId>
            <artifactId>kafka-clients</artifactId>
        </dependency>

程式碼

package com.perfect.kafka;

import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecords;
 
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.junit.jupiter.api.Test;

import java.util.Arrays;
import java.util.Collections;
import java.util.Properties;

public class KafkaComsumerTest {

    @Test
    public void cunsumertest(){
        Properties props = new Properties();
        props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,
 
"localhost:9092");

        //關閉自動提交
        props.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG,false);
        //props.put(ConsumerConfig.AUTO_COMMIT_INTERVAL_MS_CONFIG,1000);

        //latest,earliest
        props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG,"earliest");

        props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG,
 
"org.apache.kafka.common.serialization.StringDeserializer");
        props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG,"org.apache.kafka.common.serialization.StringDeserializer");


        props.put(ConsumerConfig.GROUP_ID_CONFIG,"bigdata1");

        KafkaConsumer<String,String> c = new KafkaConsumer<String, String>(props);

        c.subscribe(Collections.singletonList("test2"));

        while(true){

         ConsumerRecords records = c.poll(100);

         records.forEach(System.out::println);
        }

       // c.close();
    }
}