使用 idea 创建一个 maven 项目
kafka 安装
详见
java
依赖
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
| <?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.qn</groupId>
<artifactId>springboot</artifactId>
<version>1.0-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.3.RELEASE</version>
</parent>
<properties>
<java.version>1.8</java.version>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
</dependency>
</dependencies>
</project>
|
配置
1
2
3
4
5
6
7
8
9
10
11
12
13
| server:
port: 8089
spring:
kafka:
bootstrap-servers: localhost:9092
producer:
key-serializer: org.apache.kafka.common.serialization.StringSerializer
value-serializer: org.apache.kafka.common.serialization.StringSerializer
consumer:
group-id: myGroup
key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
value-deserializer: org.apache.kafka.common.serialization.StringDeserializer
|
消息体
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
| package com.qn.kafka;
import java.util.Date;
public class Message {
private long id;
private String msg;
private Date sendTime;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public Date getSendTime() {
return sendTime;
}
public void setSendTime(Date sendTime) {
this.sendTime = sendTime;
}
}
|
生产者
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
| package com.qn.kafka;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.stereotype.Component;
import java.util.Date;
import java.util.UUID;
@Component
public class KafkaSender {
@Autowired
private KafkaTemplate<String,String> kafkaTemplate;
private Gson gson = new GsonBuilder().create();
public void send() {
Message message = new Message();
message.setId(System.currentTimeMillis());
message.setMsg(UUID.randomUUID().toString());
message.setSendTime(new Date());
kafkaTemplate.send("test", gson.toJson(message));
}
}
|
消费者
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
| package com.qn.kafka;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.stereotype.Component;
import java.util.Optional;
@Component
public class KafkaConsumer {
@KafkaListener(topics = {"test"})
public void listen(ConsumerRecord<?, ?> record) {
Optional<?> kafkaMessage = Optional.ofNullable(record.value());
if (kafkaMessage.isPresent()) {
Object message = kafkaMessage.get();
System.out.println("接收信息"+message);
}
}
}
|
启动类
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
| package com.qn;
import com.qn.kafka.KafkaSender;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
@SpringBootApplication
public class Application {
public static void main(String[] args) {
ConfigurableApplicationContext context = SpringApplication.run(Application.class, args);
KafkaSender sender = context.getBean(KafkaSender.class);
for (int i = 0; i < 3; i++) {
sender.send();
try {
Thread.sleep(3_000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
|
测试
直接运行启动类：
参考资料
Spring Boot 集成 Kafka
