Maven_Kafka 实例

以你之姓@ 2022-05-16 04:10 201阅读 0赞

![这里写图片描述][SouthEast]

**ConsumeTest**

package com.demo.kafka.test;
    
    import java.util.Arrays;
    import java.util.Properties;
    
    import org.apache.kafka.clients.consumer.ConsumerRecord;
    import org.apache.kafka.clients.consumer.ConsumerRecords;
    import org.apache.kafka.clients.consumer.KafkaConsumer;
    import org.junit.Before;
    import org.junit.Test;
    
    public class ConsumeTest {
        private Properties props;
    
        @Before
        public void init() {
            props = new Properties();
            props.put("bootstrap.servers", "192.168.216.138:9092,192.168.216.139:9092,192.168.216.140:9092");
            props.put("group.id", "testConsumer");
            props.put("enable.auto.commit", "true");
            props.put("auto.commit.interval.ms", "1000");
            props.put("session.timeout.ms", "30000");
            props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
            props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
        }
    
        @Test
        public void consume() {
            System.out.println("begin consumer");
            connectionKafka();
            System.out.println("finish consumer");
        }
    
        @SuppressWarnings("resource")
        public void connectionKafka() {
            KafkaConsumer<String, String> consumer = new KafkaConsumer<>(props);
            consumer.subscribe(Arrays.asList("my-topic", "test-topic"));
    
            while (true) {
                ConsumerRecords<String, String> records = consumer.poll(100);
    
                for (ConsumerRecord<String, String> record : records) {
                    System.out.println("收到消息：" + record.value());
                }
            }
        }
    }

**ProduceTest.java**

package com.demo.kafka.test;
    
    import java.util.Properties;
    import java.util.Scanner;
    
    import org.apache.kafka.clients.producer.KafkaProducer;
    import org.apache.kafka.clients.producer.Producer;
    import org.apache.kafka.clients.producer.ProducerRecord;
    import org.junit.After;
    import org.junit.Before;
    import org.junit.Test;
    
    public class ProduceTest {
        private static Scanner scanner;
    
        private Producer<String, String> producer;
        private Properties props;
    
        @Before
        public void init() {
            props = new Properties();
            props.put("bootstrap.servers", "192.168.216.138:9092,192.168.216.139:9092,192.168.216.140:9092");
            props.put("acks", "all");
            props.put("retries", 0);
            props.put("batch.size", 16384);
            props.put("linger.ms", 1);
            props.put("buffer.memory", 33554432);
            props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
            props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
        }
    
        @Test
        public void produce() {
            System.out.println("begin produce");
            connectionKafka();
            System.out.println("finish produce");
        }
    
        public void connectionKafka() {
            producer = new KafkaProducer<>(props);
            scanner = new Scanner(System.in);
    
            while (true) {
                System.out.println("请输入要发送的消息：");
                String value = scanner.nextLine();
                if (value.equals("exit")) {
                    break;
                }
    
                producer.send(new ProducerRecord<String, String>("my-topic", value));
            }
    
        }
    
        @After
        public void destroy() {
            producer.close();
        }
    
    }

**pom.xml**

<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.demo</groupId>
        <artifactId>maven-kafka</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <packaging>jar</packaging>
    
        <name>maven-kafka</name>
        <url>http://maven.apache.org</url>
    
        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.12</version>
                <scope>test</scope>
            </dependency>
    
            <dependency>
                <groupId>org.apache.kafka</groupId>
                <artifactId>kafka-clients</artifactId>
                <version>0.10.0.0</version>
            </dependency>
    
            <dependency>
                <groupId>org.apache.kafka</groupId>
                <artifactId>kafka_2.11</artifactId>
                <version>0.10.0.0</version>
            </dependency>
        </dependencies>
    
        <build>
            <plugins>
                <plugin>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.5.1</version>
                    <configuration>
                        <source>1.7</source>
                        <target>1.7</target>
                        <encoding>UTF-8</encoding>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-source-plugin</artifactId>
                    <version>3.0.1</version>
                    <executions>
                        <execution>
                            <id>attach-sources</id>
                            <goals>
                                <goal>jar</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>
            </plugins>
        </build>
    </project>

[SouthEast]: /images/20220516/42fa9a1d07164b85959068dca5e860db.png