1. Java代码编写Kafka的生产者---旧版本的生产者代码--不建议使用

1. 开启进程

[node123]systemctl stop firewalld
 
[node123]zkServer.sh start
 
[node123]kafka-server-start.sh /opt/app/kafka-0.11.0.0/config/server.properties &
 
[node1]kafka-console-consumer.sh --zookeeper node1:2181 --topic demo

2. java导入依赖

<?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>org.example</groupId>
    <artifactId>kafkacode</artifactId>
    <version>1.0-SNAPSHOT</version>
 
    <dependencies>
        <dependency>
            <groupId>org.apache.kafka</groupId>
            <artifactId>kafka-clients</artifactId>
            <version>0.11.0.0</version>
        </dependency>
 
        <dependency>
            <groupId>org.apache.kafka</groupId>
            <artifactId>kafka_2.12</artifactId>
            <version>0.11.0.0</version>
        </dependency>
    </dependencies>
</project>

3. java代码

package old_out;
 
import kafka.javaapi.producer.Producer;
import kafka.producer.KeyedMessage;
import kafka.producer.ProducerConfig;
 
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
 
/**
 * Java代码编写Kafka的生产者---旧版本的生产者代码--不建议使用
 */
public class OldProducerOut {
    public static void main(String[] args) {
        // 定义生产者连接Kafka集群必备参数
        Properties properties = new Properties();
        properties.put("metadata.broker.list", "192.168.200.111:9092");
        properties.put("request.required.acks", "1");
        properties.put("serializer.class", "kafka.serializer.StringEncoder");
 
        // 创建一个生产者
        Producer producer = new Producer(new ProducerConfig(properties));
 
        // 创建KeyedMessage对象---封装主题和数据
        List<KeyedMessage> list = new ArrayList<KeyedMessage>();
        for (int i = 0; i < 100; i++) {
            KeyedMessage message = new KeyedMessage("demo", "java api" + i);
            list.add(message);
        }
 
        producer.send(list);
    }
}

4. 效果图