消费者API

BD_Marathon2025-08-20 9:01

目录

独立消费者案例（订阅主题）

c 复制代码 
package com.tsg.kafka.consumer;

import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.common.serialization.StringDeserializer;

import java.time.Duration;
import java.util.ArrayList;
import java.util.Properties;

public class CustomConsumer {
    public static void main(String[] args) {

        Properties properties = new Properties();

        properties.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,"master:9092,slave1:9092");

        properties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG,StringDeserializer.class.getName());
        properties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG,StringDeserializer.class.getName());

        properties.put(ConsumerConfig.GROUP_ID_CONFIG,"test");


        KafkaConsumer<String, String> kafkaConsumer = new KafkaConsumer<String, String>(properties);

        ArrayList<String> topics = new ArrayList<String>();
        topics.add("first");

        kafkaConsumer.subscribe(topics);

        while (true){
            ConsumerRecords<String, String> consumerRecords = kafkaConsumer.poll(Duration.ofSeconds(1));

            for (ConsumerRecord<String, String> consumerRecord : consumerRecords) {
                System.out.println(consumerRecord);
            }
        }




    }
}

独立消费者案例（订阅分区）

c 复制代码 
package com.tsg.kafka.consumer;

import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.common.TopicPartition;
import org.apache.kafka.common.serialization.StringDeserializer;

import java.time.Duration;
import java.util.ArrayList;
import java.util.Properties;

public class CustomConsumerPartition {
    public static void main(String[] args) {

        Properties properties = new Properties();

        properties.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,"master:9092,slave1:9092");

        properties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG,StringDeserializer.class.getName());
        properties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG,StringDeserializer.class.getName());

        properties.put(ConsumerConfig.GROUP_ID_CONFIG,"test");

        KafkaConsumer<String, String> kafkaConsumer = new KafkaConsumer<>(properties);


        ArrayList<TopicPartition> topicPartitions = new ArrayList<>();
        topicPartitions.add(new TopicPartition("first",0));


        kafkaConsumer.assign(topicPartitions);

        while (true){

            ConsumerRecords<String, String> consumerRecords = kafkaConsumer.poll(Duration.ofSeconds(1));

            for (ConsumerRecord<String, String> consumerRecord : consumerRecords) {
                System.out.println(consumerRecord);
            }


        }












    }
}

消费者组案例

测试同一个主题的分区数据，只能由于一个消费者组中的一个一个消费

消费者1

c 复制代码 
package com.tsg.kafka.consumer;

import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.common.serialization.StringDeserializer;

import java.time.Duration;
import java.util.ArrayList;
import java.util.Properties;

public class CustomConsumer {
    public static void main(String[] args) {

        Properties properties = new Properties();

        properties.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,"master:9092,slave1:9092");

        properties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG,StringDeserializer.class.getName());
        properties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG,StringDeserializer.class.getName());

        properties.put(ConsumerConfig.GROUP_ID_CONFIG,"test");


        KafkaConsumer<String, String> kafkaConsumer = new KafkaConsumer<String, String>(properties);

        ArrayList<String> topics = new ArrayList<String>();
        topics.add("four");

        kafkaConsumer.subscribe(topics);

        while (true){
            ConsumerRecords<String, String> consumerRecords = kafkaConsumer.poll(Duration.ofSeconds(1));

            for (ConsumerRecord<String, String> consumerRecord : consumerRecords) {
                System.out.println(consumerRecord);
            }
        }




    }
}

消费者2

c 复制代码 
package com.tsg.kafka.consumer;

import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.common.serialization.StringDeserializer;

import java.time.Duration;
import java.util.ArrayList;
import java.util.Properties;

public class CustomConsumer1 {
    public static void main(String[] args) {

        Properties properties = new Properties();

        properties.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,"master:9092,slave1:9092");

        properties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG,StringDeserializer.class.getName());
        properties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG,StringDeserializer.class.getName());

        properties.put(ConsumerConfig.GROUP_ID_CONFIG,"test");


        KafkaConsumer<String, String> kafkaConsumer = new KafkaConsumer<String, String>(properties);

        ArrayList<String> topics = new ArrayList<String>();
        topics.add("four");

        kafkaConsumer.subscribe(topics);

        while (true){
            ConsumerRecords<String, String> consumerRecords = kafkaConsumer.poll(Duration.ofSeconds(1));

            for (ConsumerRecord<String, String> consumerRecord : consumerRecords) {
                System.out.println(consumerRecord);
            }
        }




    }
}

消费者3

c 复制代码 
package com.tsg.kafka.consumer;

import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.common.serialization.StringDeserializer;

import java.time.Duration;
import java.util.ArrayList;
import java.util.Properties;

public class CustomConsumer2 {
    public static void main(String[] args) {

        Properties properties = new Properties();

        properties.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,"master:9092,slave1:9092");

        properties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG,StringDeserializer.class.getName());
        properties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG,StringDeserializer.class.getName());

        properties.put(ConsumerConfig.GROUP_ID_CONFIG,"test");


        KafkaConsumer<String, String> kafkaConsumer = new KafkaConsumer<String, String>(properties);

        ArrayList<String> topics = new ArrayList<String>();
        topics.add("four");

        kafkaConsumer.subscribe(topics);

        while (true){
            ConsumerRecords<String, String> consumerRecords = kafkaConsumer.poll(Duration.ofSeconds(1));

            for (ConsumerRecord<String, String> consumerRecord : consumerRecords) {
                System.out.println(consumerRecord);
            }
        }




    }
}

三个消费者的组ID相同，会形成消费者组，每个消费者消费一个分区数据

生产者发送数据

c 复制代码 
package com.tsg.kafka.producer;
import org.apache.kafka.clients.producer.*;
import org.apache.kafka.common.serialization.StringSerializer;
import java.util.Properties;

public class CustomProducerCallback {

    public static void main(String[] args) {

        Properties properties = new Properties();

        // 连接集群
        properties.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "master:9092,slave1:9092");

        // 指定对应的key和value的序列化类型
        properties.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
        properties.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());

        // 设置acks
        properties.put(ProducerConfig.ACKS_CONFIG,"all");

        // 重试次数retries，默认是int最大值,2^31 - 1
        properties.put(ProducerConfig.RETRIES_CONFIG,3);

        properties.put(ProducerConfig.PARTITIONER_CLASS_CONFIG,"com.tsg.kafka.producer.MyPartitioner");

        // 创建kafka生产者对象
        KafkaProducer<String, String> kafkaProducer = new KafkaProducer<String, String>(properties);

        // 发送数据
        for (int i = 0; i < 5; i++) {
            kafkaProducer.send(new ProducerRecord<String, String>("four",2,"","分区2"), new Callback() {
                public void onCompletion(RecordMetadata metadata, Exception exception) {
                    if(exception == null){
                        System.out.println("主题：" +metadata.topic() + " 分区: " +metadata.partition());
                    }
                }
            });
        }

        // 关闭资源
        kafkaProducer.close();

    }
}
c 复制代码 
package com.tsg.kafka.producer;
import org.apache.kafka.clients.producer.*;
import org.apache.kafka.common.serialization.StringSerializer;
import java.util.Properties;

public class CustomProducerCallback {

    public static void main(String[] args) {

        Properties properties = new Properties();

        // 连接集群
        properties.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "master:9092,slave1:9092");

        // 指定对应的key和value的序列化类型
        properties.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
        properties.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());

        // 设置acks
        properties.put(ProducerConfig.ACKS_CONFIG,"all");

        // 重试次数retries，默认是int最大值,2^31 - 1
        properties.put(ProducerConfig.RETRIES_CONFIG,3);

        properties.put(ProducerConfig.PARTITIONER_CLASS_CONFIG,"com.tsg.kafka.producer.MyPartitioner");

        // 创建kafka生产者对象
        KafkaProducer<String, String> kafkaProducer = new KafkaProducer<String, String>(properties);

        // 发送数据
        for (int i = 0; i < 5; i++) {
            kafkaProducer.send(new ProducerRecord<String, String>("four",1,"","分区2"), new Callback() {
                public void onCompletion(RecordMetadata metadata, Exception exception) {
                    if(exception == null){
                        System.out.println("主题：" +metadata.topic() + " 分区: " +metadata.partition());
                    }
                }
            });
        }

        // 关闭资源
        kafkaProducer.close();

    }
}
c 复制代码 
```c
package com.tsg.kafka.producer;
import org.apache.kafka.clients.producer.*;
import org.apache.kafka.common.serialization.StringSerializer;
import java.util.Properties;

public class CustomProducerCallback {

    public static void main(String[] args) {

        Properties properties = new Properties();

        // 连接集群
        properties.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "master:9092,slave1:9092");

        // 指定对应的key和value的序列化类型
        properties.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
        properties.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());

        // 设置acks
        properties.put(ProducerConfig.ACKS_CONFIG,"all");

        // 重试次数retries，默认是int最大值,2^31 - 1
        properties.put(ProducerConfig.RETRIES_CONFIG,3);

        properties.put(ProducerConfig.PARTITIONER_CLASS_CONFIG,"com.tsg.kafka.producer.MyPartitioner");

        // 创建kafka生产者对象
        KafkaProducer<String, String> kafkaProducer = new KafkaProducer<String, String>(properties);

        // 发送数据
        for (int i = 0; i < 5; i++) {
            kafkaProducer.send(new ProducerRecord<String, String>("four",0,"","分区2"), new Callback() {
                public void onCompletion(RecordMetadata metadata, Exception exception) {
                    if(exception == null){
                        System.out.println("主题：" +metadata.topic() + " 分区: " +metadata.partition());
                    }
                }
            });
        }

        // 关闭资源
        kafkaProducer.close();

    }
}
相关推荐
bugcome_com3 小时前
阿里云 OSS C# SDK 使用实践与参数详解
阿里云·c#
懒人咖13 小时前
缺料分析时携带用料清单的二开字段
c#·金蝶云星空
bugcome_com14 小时前
深入了解 C# 编程环境及其开发工具
c#
wfserial15 小时前
c#使用微软自带speech选择男声仍然是女声的一种原因
microsoft·c#·speech
阔皮大师17 小时前
INote轻量文本编辑器
java·javascript·python·c#
kylezhao201918 小时前
C# 中的 SOLID 五大设计原则
开发语言·c#
lucky670718 小时前
Spring Boot集成Kafka：最佳实践与详细指南
spring boot·kafka·linq
啦啦啦_999918 小时前
Redis-5-doFormatAsync()方法
数据库·redis·c#
Porco.w19 小时前
C#与三菱PLC FX5U通信
网络·c#
E_ICEBLUE21 小时前
PPT 批量转图片：在 Web 预览中实现翻页效果（C#/VB.NET）
c#·powerpoint·svg
热门推荐
01GitHub 镜像站点02Claude Code + GLM4.7 避坑指南：解决 Unable to connect to Anthropic services03UV安装并设置国内源04openclaw配置教程（linux+局域网ollama）05OpenClaw Chrome扩展使用教程 - 浏览器中继控制06Linux下V2Ray安装配置指南07Claude Code Skills 实用使用手册08AI 规范驱动开发“三剑客”深度对比：Spec-Kit、Kiro 与 OpenSpec 实战指南09openclaw使用nginx反代部署过程 与disconnected (1008): pairing required解决10Vue-skills的中文文档