, args);
生产者配置类:
package com.infinitePossibilities.config;
import java.util.HashMap;
import java.util.Map;
import com.infinitePossibilities.common.MessageEntity;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.common.serialization.StringSerializer;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.kafka.annotation.EnableKafka;
import org.springframework.kafka.core.DefaultKafkaProducerFactory;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.kafka.core.ProducerFactory;
import org.springframework.kafka.support.serializer.JsonSerializer;
@Configuration
@EnableKafka
public class KafkaProducerConfig {
@Value("${kafka.producer.servers}")
private String servers;
@Value("${kafka.producer.retries}")
private int retries;
@Value("${kafka.producer.batch.size}")
private int batchSize;
@Value("${kafka.producer.linger}")
private int linger;
@Value("${kafka.producer.buffer.memory}")
private int bufferMemory;
public Map<String, Object> producerConfigs() {
Map<String, Object> props = new HashMap<>();
props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, servers);
props.put(ProducerConfig.RETRIES_CONFIG, retries);
props.put(ProducerConfig.BATCH_SIZE_CONFIG, batchSize);
props.put(ProducerConfig.LINGER_MS_CONFIG, linger);
props.put(ProducerConfig.BUFFER_MEMORY_CONFIG, bufferMemory);
props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
return props;
public ProducerFactory<String, MessageEntity> producerFactory() {
return new DefaultKafkaProducerFactory<>(producerConfigs(),
new StringSerializer(),
new JsonSerializer<MessageEntity>());
@Bean
public KafkaTemplate<String, MessageEntity> kafkaTemplate() {
return new KafkaTemplate<>(producerFactory());
消费者配置类:
package com.infinitePossibilities.config;
import com.infinitePossibilities.common.MessageEntity;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.common.serialization.StringDeserializer;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.kafka.annotation.EnableKafka;
import org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory;
import org.springframework.kafka.config.KafkaListenerContainerFactory;
import org.springframework.kafka.core.ConsumerFactory;
import org.springframework.kafka.core.DefaultKafkaConsumerFactory;
import org.springframework.kafka.listener.ConcurrentMessageListenerContainer;
import org.springframework.kafka.support.serializer.JsonDeserializer;
import java.util.HashMap;
import java.util.Map;
@Configuration
@EnableKafka
public class KafkaConsumerConfig {
@Value("${kafka.consumer.servers}")
private String servers;
@Value("${kafka.consumer.enable.auto.commit}")
private boolean enableAutoCommit;
@Value("${kafka.consumer.session.timeout}")
private String sessionTimeout;
@Value("${kafka.consumer.auto.commit.interval}")
private String autoCommitInterval;
@Value("${kafka.consumer.group.id}")
private String groupId;
@Value("${kafka.consumer.auto.offset.reset}")
private String autoOffsetReset;
@Value("${kafka.consumer.concurrency}")
private int concurrency;
@Bean
public KafkaListenerContainerFactory<ConcurrentMessageListenerContainer<String, MessageEntity>> kafkaListenerContainerFactory() {
ConcurrentKafkaListenerContainerFactory<String, MessageEntity> factory = new ConcurrentKafkaListenerContainerFactory<>();
factory.setConsumerFactory(consumerFactory());
factory.setConcurrency(concurrency);
factory.getContainerProperties().setPollTimeout(1500);
return factory;
private ConsumerFactory<String, MessageEntity> consumerFactory() {
return new DefaultKafkaConsumerFactory<>(
consumerConfigs(),
new StringDeserializer(),
new JsonDeserializer<>(MessageEntity.class)
private Map<String, Object> consumerConfigs() {
Map<String, Object> propsMap = new HashMap<>();
propsMap.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, servers);
propsMap.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, enableAutoCommit);
propsMap.put(ConsumerConfig.AUTO_COMMIT_INTERVAL_MS_CONFIG, autoCommitInterval);
propsMap.put(ConsumerConfig.SESSION_TIMEOUT_MS_CONFIG, sessionTimeout);
propsMap.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
propsMap.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
propsMap.put(ConsumerConfig.GROUP_ID_CONFIG, groupId);
propsMap.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, autoOffsetReset);
return propsMap;
Controller:
package com.infinitePossibilities.controller;
import com.google.gson.Gson;
import com.infinitePossibilities.common.ErrorCode;
import com.infinitePossibilities.common.MessageEntity;
import com.infinitePossibilities.common.Response;
import com.infinitePossibilities.producer.SimpleProducer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@Slf4j
@RestController
@RequestMapping("/kafka")
public class ProduceController {
@Autowired
private SimpleProducer simpleProducer;
@Value("${kafka.topic.default}")
private String topic;
private Gson gson = new Gson();
@RequestMapping(value = "/hello", method = RequestMethod.GET, produces = {"application/json"})
public Response sendKafka() {
return new Response(ErrorCode.SUCCESS, "OK");
@RequestMapping(value = "/send", method = RequestMethod.POST, produces = {"application/json"})
public Response sendKafka(@RequestBody MessageEntity message) {
try {
log.info("kafka的消息={}", gson.toJson(message));
simpleProducer.send(topic, "key", message);
log.info("发送成功.");
return new Response(ErrorCode.SUCCESS, "发送kafka成功");
} catch (Exception e) {
log.error("发送kafka失败", e);
return new Response(ErrorCode.EXCEPTION, "发送kafka失败");
生产者发送消息:
package com.infinitePossibilities.producer;
import com.infinitePossibilities.common.MessageEntity;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.kafka.support.SendResult;
import org.springframework.stereotype.Component;
import org.springframework.util.concurrent.ListenableFuture;
@Component
public class SimpleProducer {
@Autowired
@Qualifier("kafkaTemplate")
private KafkaTemplate<String, MessageEntity> kafkaTemplate;
public void send(String topic, MessageEntity message) {
kafkaTemplate.send(topic, message);
public void send(String topic, String key, MessageEntity entity) {
ProducerRecord<String, MessageEntity> record = new ProducerRecord<>(
topic,
entity);
long startTime = System.currentTimeMillis();
ListenableFuture<SendResult<String, MessageEntity>> future = kafkaTemplate.send(record);
future.addCallback(new ProducerCallback(startTime, key, entity));
发送 回调:
package com.infinitePossibilities.producer;
import com.google.gson.Gson;
import com.infinitePossibilities.common.MessageEntity;
import lombok.extern.slf4j.Slf4j;
import org.apache.kafka.clients.producer.RecordMetadata;
import org.springframework.kafka.support.SendResult;
import org.springframework.lang.Nullable;
import org.springframework.util.concurrent.ListenableFutureCallback;
@Slf4j
public class ProducerCallback implements ListenableFutureCallback<SendResult<String, MessageEntity>> {
private final long startTime;
private final String key;
private final MessageEntity message;
private final Gson gson = new Gson();
public ProducerCallback(long startTime, String key, MessageEntity message) {
this.startTime = startTime;
this.key = key;
this.message = message;
@Override
public void onSuccess(@Nullable SendResult<String, MessageEntity> result) {
if (result == null) {
return;
long elapsedTime = System.currentTimeMillis() - startTime;
RecordMetadata metadata = result.getRecordMetadata();
if (metadata != null) {
StringBuilder record = new StringBuilder();
record.append("message(")
.append("key = ").append(key).append(",")
.append("message = ").append(gson.toJson(message)).append(")")
.append("sent to partition(").append(metadata.partition()).append(")")
.append("with offset(").append(metadata.offset()).append(")")
.append("in ").append(elapsedTime).append(" ms");
log.info("成功的回调: "+record.toString());
@Override
public void onFailure(Throwable ex) {
ex.printStackTrace();
消费者监听消息:
package com.infinitePossibilities.consumer;
import com.google.gson.Gson;
import com.infinitePossibilities.common.MessageEntity;
import lombok.extern.slf4j.Slf4j;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.stereotype.Component;
@Slf4j
@Component
public class SimpleConsumer {
private final Gson gson = new Gson();
@KafkaListener(topics = "${kafka.topic.default}", containerFactory = "kafkaListenerContainerFactory")
public void receive(MessageEntity message) {
log.info("消费端取到数据: "+gson.toJson(message));
响应数据类型,状态码:
package com.infinitePossibilities.common;
public class ErrorCode {
public final static int SUCCESS = 200;
public final static int EXCEPTION = 500;
kafka.consumer.zookeeper.connect=127.0.0.1:2181
kafka.consumer.servers=http://本机地址:9092
kafka.consumer.enable.auto.commit=true
kafka.consumer.session.timeout=6000
kafka.consumer.auto.commit.interval=100
kafka.consumer.auto.offset.reset=latest
kafka.consumer.topic=KafkaSimpleExample-kafka
kafka.consumer.group.id=KafkaSimpleExample
kafka.consumer.concurrency=10
kafka.producer.servers=http://本机地址:9092
kafka.producer.retries=0
kafka.producer.batch.size=4096
kafka.producer.linger=1
kafka.producer.buffer.memory=40960
kafka.topic.default=KafkaSimpleExample-kafka
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.infinitePossibilities</groupId>
<artifactId>examples</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>examples</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.5</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.9.0</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>5.0.7.RELEASE</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>