软件支持

1. JDK1.8
2. Zookeeper-3.5.6
3. Kafka_2.12-2.3.1
4. Springboot-2.2.1.RELEASE
5. IDEA 2019.2.4
   以上软件请自行安装

启动Zookeeper

修改配置文件

把apache-zookeeper-3.5.6-bin文件夹下conf文件夹中的zoo_sample.cfg复制一份，重命名为zoo.cfg

启动powershell

在apache-zookeeper-3.5.6-bin文件夹下，按住SHIFT+鼠标右键，打开powershell或者cmd窗口，输入下面的代码

.\bin\zkServer.cmd

示例：

启动Kafka

修改配置文件

启动服务

在kafka_2.12-2.3.1文件夹下，按住SHIFT+鼠标右键，打开powershell或者cmd窗口，输入下面的代码

.\bin\windows\kafka-server-start.bat config\server.properties

示例：

创建Topic

在kafka_2.12-2.3.1文件夹下开启一个新的powershell窗口，输入下面的代码：

.\bin\windows\kafka-topics.bat --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic springboot-kafka

此时，我们创建了一个名称为springboot-kafka的topic，接下来我们编写简单队列的Demo

Springboot创建项目

Maven引入Kafka

pom文件

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.pengo</groupId>
    <artifactId>springboot-kafka</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot-kafka</name>
    <description>A Demo project for Springboot-kafka</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <!--Kafka-->
        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka</artifactId>
        </dependency>

        <!--Lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

配置application

## kafka ##
spring.kafka.bootstrap-servers=127.0.0.1:9092
spring.kafka.producer.key-serializer=org.apache.kafka.common.serialization.StringSerializer
spring.kafka.producer.value-serializer=org.apache.kafka.common.serialization.StringSerializer
spring.kafka.consumer.group-id=test
spring.kafka.consumer.enable-auto-commit=true
spring.kafka.consumer.key-deserializer=org.apache.kafka.common.serialization.StringDeserializer
spring.kafka.consumer.value-deserializer=org.apache.kafka.common.serialization.StringDeserializer
#topic名
spring.kafka.topic=springboot-kafka

生产者

@Slf4j
@Component
public class Producer {

    @Autowired
    private KafkaTemplate kafkaTemplate;

    @Value("${spring.kafka.topic}")     //引入application.properties中的数据
    private String topics;

    public void send(String jsonString) {
        log.info("待发送的消息：{}", jsonString);
        kafkaTemplate.send(topics, jsonString);
    }

}

消费者

@Slf4j
@Component
public class Consumer {

    @KafkaListener(topics = "${spring.kafka.topic}")
    public void receiver(ConsumerRecord record) {
        log.info("接收到的数据：topic={},message={}", record.topic(), record.value());
    }
}

测试

先启动springboot服务，再启动测试代码

@SpringBootTest
class SpringbootKafkaApplicationTests {

    @Autowired
    private Producer producer;

    @Test
    void contextLoads() {
        for (int i = 0; i < 10; i++) {
            producer.send("发送第" + (i + 1) + "条消息！");
        }
    }

}

测试结果

测试窗口数据

Springboot窗口数据