kafka传输图片demo

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本文链接： https://blog.csdn.net/weixin_42558056/article/details/98845431

因为项目推进，需要在框架里实现新的功能，将已经写好的利用kafka实现图片的生产消费demo在博客中存档

VideoEventGenerator类

import org.apache.kafka.clients.producer.Producer;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.log4j.Logger;
import org.opencv.core.Core;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.OutputStream;
import java.sql.Timestamp;

/**
 * 图片序列化发送实现类
 * @author zhoutao
 * @data 2019/8/3
 */
public class VideoEventGenerator implements Runnable {
    //记录日志
    private static final Logger logger = Logger.getLogger(VideoEventGenerator.class);
    private String cameraId;
    private String url;
    private Producer<String,byte[]> producer;
    private String topic;
    //构造方法
    public VideoEventGenerator(String cameraId, String url, Producer<String,byte[]> producer, String topic) {
        this.cameraId = cameraId;
        this.url = url;
        this.producer = producer;
        this.topic = topic;
    }
    //加载opencv库
//    static {
//        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
//    }
    //run方法
    public void run(){
        logger.info("开始处理相机："+cameraId+"它的url是"+url);
        try{
            videoprocess(cameraId,url,producer,topic);
        }catch(Exception e){
            logger.error(e.getMessage());
        }
    }
    //将图片利用BufferedImage转为字节数组
    private void videoprocess(String cameraId,String url,Producer<String,byte[]> producer, String topic)throws Exception{
        String timestamp = new Timestamp(System.currentTimeMillis()).toString();
        BufferedImage image = ImageIO.read(new FileInputStream(url));
        OutputStream bOut = new ByteArrayOutputStream();
        ImageIO.write(image,"jpg",bOut);
        byte[]data=((ByteArrayOutputStream) bOut).toByteArray();
        ProducerRecord<String, byte[]> datas = new ProducerRecord<String, byte[]>(topic, cameraId,data);
        try {
            producer.send(datas);
//            logger.info("Generated events for cameraId="+cameraId+" timestamp="+timestamp);
        }catch(Exception e) {
            e.printStackTrace();
        }finally{
            logger.info("Generated events for cameraId="+cameraId+" timestamp="+timestamp);
        }
    }
}

VideoStreamCollector类

import java.awt.image.BufferedImage;
import java.io.*;
import java.util.Collections;
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.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.Producer;
import org.apache.log4j.Logger;

import javax.imageio.ImageIO;

/**
 *
 * 1.创建kafka生产者
 * 2.采集图片多线程发送
 * @author zhoutao
 * @data 2019/8/2
 */
public class VideoStreamCollector {
    private static final Logger logger = Logger.getLogger(VideoEventGenerator.class);

    public static void main(String[] args) throws Exception {

        //将从配置文件读取到的配置加入Properties类中
        Properties prop = PropertyFileReader.readPropertyFile();
        Properties properties = new Properties();
        Properties properties2=new Properties();
        properties.put("bootstrap.servers", prop.getProperty("kafka.bootstrap.servers"));
        properties.put("acks", prop.getProperty("kafka.acks"));
        properties.put("retries", prop.getProperty("kafka.retries"));
        properties.put("batch.size", prop.getProperty("kafka.batch.size"));
        properties.put("linger.ms", prop.getProperty("kafka.linger.ms"));
        properties.put("max.request.size", prop.getProperty("kafka.max.request.size"));
        properties.put("compression.type", prop.getProperty("kafka.compression.type"));
        properties.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
        properties.put("value.serializer", "org.apache.kafka.common.serialization.ByteArraySerializer");
        properties2.put("bootstrap.servers", prop.getProperty("kafka.bootstrap.servers"));
        properties2.put("group.id", "video");
        properties2.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
        properties2.put("value.deserializer", "org.apache.kafka.common.serialization.ByteArrayDeserializer");
        //创建生产者
        Producer<String, byte[]> producer = new KafkaProducer<String,byte[]>(properties);
        generateIoTEvent(producer,prop.getProperty("kafka.topic"),prop.getProperty("camera.id"),prop.getProperty("camera.url"));
        //创建消费者
        KafkaConsumer<String,byte[]> consumer=new KafkaConsumer<String,byte[]>(properties2);
        //订阅主题
        consumer.subscribe(Collections.singletonList("kafkatest"));
        //接收数据
        acceptData(consumer);
    }
    //创立图片事件
    private static void generateIoTEvent(Producer<String, byte[]> producer, String topic, String camId, String videoUrl) throws Exception {
        String[] urls = videoUrl.split(",");
        String[] ids = camId.split(",");
        if(urls.length != ids.length){
            throw new Exception("相机数与图片数应相同");
        }
        logger.info("图片路数："+urls.length);
        //多线程调用发送实现类
        for(int i=0;i<urls.length;i++){
            Thread t = new Thread(new VideoEventGenerator(ids[i].trim(),urls[i].trim(),producer,topic));
            t.start();
        }
    }
    //接收数据方法
    private  static  void acceptData( KafkaConsumer<String,byte[]> consumer)throws Exception{
        try{
            while(true){
                ConsumerRecords<String,byte[]> records=consumer.poll(100);
                for(ConsumerRecord<String,byte[]> record:records){
                    System.out.println("获取数据");
                    byte[] data=record.value();
                    ByteArrayInputStream in = new ByteArrayInputStream(data);
                    BufferedImage image = ImageIO.read(in);
                    Long time=System.currentTimeMillis();
                    OutputStream bOut = new FileOutputStream("C:/Users/Administrator.000/Desktop/"+time.toString()+".jpg");
                    ImageIO.write(image,"jpg",bOut);
                }
            }
        }catch(Exception ex){
            ex.printStackTrace();
        }finally {
            consumer.close();
        }
    }

}

PropertyFileReader类

import org.apache.log4j.Logger;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
/**
 *
 *读取kafka配置文件
 * @author zhoutao
 * @data 2019/8/2
 */
public class PropertyFileReader {
    private static final org.apache.log4j.Logger logger = Logger.getLogger(PropertyFileReader.class);
    private static Properties prop = new Properties();

    public static Properties readPropertyFile() throws Exception {
        if (prop.isEmpty()) {
            //实现获取在classpath路径下的资源文件的输入流。
            InputStream input = PropertyFileReader.class.getClassLoader().getResourceAsStream("stream-collector.properties");
            try {
                prop.load(input);
            } catch (IOException e) {
                logger.error(e);
                throw e;
            } finally {
                if (input != null) {
                    input.close();
                }
            }
        }
        return prop;
    }
}

pom.xml

<?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>edu.zt</groupId>
    <artifactId>mavenDemo_idea</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <!-- kafka -->
        <!-- https://mvnrepository.com/artifact/org.apache.kafka/kafka -->
        <dependency>
            <groupId>org.apache.kafka</groupId>
            <artifactId>kafka_2.11</artifactId>
            <version>0.10.0.1</version>
        </dependency>
        <!-- gson -->
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.8.0</version>
        </dependency>
        <!-- commons-lang -->
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.6</version>
        </dependency>
        <!-- log4j -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <!-- opencv -->
        <!-- https://mvnrepository.com/artifact/opencv/opencv -->
        <dependency>
            <groupId>org.bytedeco</groupId>
            <artifactId>opencv-platform</artifactId>
            <version>4.1.0-1.5.1</version>
        </dependency>
    </dependencies>


</project>

log4j.properties

# Root logger option
log4j.rootLogger=INFO, file, stdout

# Direct log messages to a log file
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=F:/tmp/stream-collector.log
log4j.appender.file.MaxFileSize=10MB
log4j.appender.file.MaxBackupIndex=10
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

# Direct log messages to stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

Stream-collector.properties

# Kafka properties
kafka.bootstrap.servers=10.34.51.202:9092
kafka.acks=1
kafka.retries=1
# 20 MB
kafka.batch.size=20971520
kafka.linger.ms=5
kafka.compression.type=gzip
# 2 MB
kafka.max.request.size=2097152
kafka.topic=kafkatest
//url和id以逗号分隔，顺序必须对应
camera.url=C:/Users/Administrator.000/Desktop/timg.jpg,C:/Users/Administrator.000/Desktop/timg2.jpg
camera.id=cam1,cam2