kafka对数据序列化和反序列化 - 数据结构 - 机器学习
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kafka对数据序列化和反序列化
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pom.xml中内容如下：
<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.lenovo</groupId>
<artifactId>random</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>random</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<kafka.version>0.10.0.1</kafka.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.11</artifactId>
<version>${kafka.version}</version>
</dependency>
<dependency>
<groupId>org.apache.avro</groupId>
<artifactId>avro</artifactId>
<version>1.7.3</version>
</dependency>
<dependency>
<groupId>org.apache.avro</groupId>
<artifactId>avro-ipc</artifactId>
<version>1.7.3</version>
</dependency>
</dependencies>
<build>
<sourceDirectory>src/main/java</sourceDirectory>
<testSourceDirectory>src/test/java</testSourceDirectory>
<plugins>
<!--
Bind the maven-assembly-plugin to the package phase
this will create a jar file without the storm dependencies
suitable for deployment to a cluster.
-->
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<archive>
<manifest>
<mainClass></mainClass>
</manifest>
</archive>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>KafkaConsumerObject.java类内容如下：
package com.lenovo.random;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import kafka.consumer.Consumer;
import kafka.consumer.ConsumerConfig;
import kafka.consumer.ConsumerIterator;
import kafka.consumer.KafkaStream;
import kafka.javaapi.consumer.ConsumerConnector;
public class KafkaConsumerObject {
public static void main(String[] args) {
String topic = "gaofeng101"; // 定义要操作的主题
Properties pro = new Properties(); // 定义相应的属性保存
pro.setProperty("zookeeper.connect", "127.0.0.1:2181"); //这里根据实际情况填写你的zk连接地址
pro.setProperty("metadata.broker.list", "127.0.0.1:9092"); //根据自己的配置填写连接地址
//pro.setProperty("group.id", "group1");
pro.setProperty("group.id", "test-consumer-groups01");
ConsumerConnector consumer = Consumer.createJavaConsumerConnector(new ConsumerConfig(pro)); // 需要定义一个主题的映射的存储集合
Map<String,Integer> topicMap = new HashMap<String,Integer>() ;
topicMap.put(topic, 1) ; // 设置要读取数据的主题
Map<String, List<KafkaStream<byte[], byte[]>>> messageStreams = consumer.createMessageStreams(topicMap) ; // 现在只有一个主题，所以此处只接收第一个主题的数据即可
// System.err.println(messageStreams.size());
// System.out.println(messageStreams);
KafkaStream<byte[], byte[]> stream = messageStreams.get(topic).get(0) ; // 第一个主题
ConsumerIterator<byte[], byte[]> iter = stream.iterator();
int i=0;
while(iter.hasNext()) {
i++;
// MsgEntity me = (MsgEntity)BeanUtils.BytesToObject(iter.next().message()); //接收消息，并将字节数组转换为对象
Member me = (Member)BeanUtils.BytesToObject(iter.next().message()); //接收消息，并将字节数组转换为对象
System.out.println("........................................................");
System.out.println("Consumer接收到的消息如下：");
me.display();
System.out.println("Consumer接收第"+i+"个消息!");
}
}
}KafkaProducerObject.java类内容如下：
package com.lenovo.random;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Date;
import java.util.Properties;
import java.util.concurrent.TimeUnit;
import kafka.javaapi.producer.Producer;
import kafka.producer.KeyedMessage;
import kafka.producer.ProducerConfig;
import java.net.Socket;
@SuppressWarnings("deprecation")
public class KafkaProducerObject {
public static void main(String[] args) throws UnknownHostException, IOException {
String topic = "gaofeng101"; // 定义要操作的主题
Properties pro = new Properties(); // 定义相应的属性保存
pro.setProperty("zookeeper.connect", "127.0.0.1:2181"); //这里根据实际情况填写你的zk连接地址
pro.setProperty("metadata.broker.list", "127.0.0.1:9092"); //根据自己的配置填写连接地址
pro.setProperty("serializer.class", ObjectEncoder.class.getName()); //填写刚刚自定义的Encoder类
Producer<Integer, Object> prod = new Producer<Integer, Object>(new ProducerConfig(pro));
char []buf= {0x1d,0x1c,0x1b,0x1a};
//创建Socket对象，连接服务器
Socket socket=new Socket("127.0.0.1",8888);
//通过客户端的套接字对象Socket方法，获取字节输出流，将数据写向服务器
OutputStream out=socket.getOutputStream();
PrintWriter pw = new PrintWriter(out);
pw.write(buf);
pw.flush();
//读取服务器发回的数据，使用socket套接字对象中的字节输入流
InputStream in=socket.getInputStream();
byte[] data=new byte[1024];
for(int i=1;i<=10000;i++) {
int len=in.read(data);
if(len<=0) {
break;
}
System.out.println("len2 is :"+len);
//MsgEntity me = new MsgEntity();
//me.DataParse(data, len);
Member mb = new Member();
mb.DataParse(data, len);
prod.send(new KeyedMessage<Integer, Object>(topic, mb)); //测试发送对象数据
System.out.println("Producer接收到第"+i+"个消息！");
try {
TimeUnit.SECONDS.sleep(1);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
in.close();
pw.close();
out.close();
socket.close();
System.out.println("发送完毕!");
}
}Member.java类内容如下：
package com.lenovo.random;
import java.io.Serializable;
import java.util.Date;
@SuppressWarnings("serial")
public class Member implements Serializable{
private int protocol;
DATATIME dt = new DATATIME();
private int len;
DATAVAL[] dataval;
public Member() {
dataval = new DATAVAL[6];
for (int i = 0; i < dataval.length; i++) {
dataval[i] = new DATAVAL();
}
System.out.println("tttttttttttttttttttttttttttttttttttttt");
}
protected static int byte2int(byte[] res) {
int targets = (res[0] & 0xff) | ((res[1] << 8) & 0xff00) // | 表示安位或
| ((res[2] << 24) >>> 8) | (res[3] << 24);
return targets;
}
protected static short byte2short(byte[] res) {
short targets = (short) ((res[0] & 0xff) | ((res[1] << 8) & 0xff00));
return targets;
}
public static double getDouble(byte[] b) {
long l;
l = b[0];
l &= 0xff;
l |= ((long) b[1] << 8);
l &= 0xffff;
l |= ((long) b[2] << 16);
l &= 0xffffff;
l |= ((long) b[3] << 24);
l &= 0xffffffffl;
l |= ((long) b[4] << 32);
l &= 0xffffffffffl;
l |= ((long) b[5] << 40);
l &= 0xffffffffffffl;
l |= ((long) b[6] << 48);
l &= 0xffffffffffffffl;
l |= ((long) b[7] << 56);
return Double.longBitsToDouble(l);
}
public boolean DataParse(byte[] data, int len) {
int tmp_protocol = 0x1a1b1c1d;
byte[] byte_protocol = new byte[4];
byte[] byte_time = new byte[8];
byte[] byte_time_mill = new byte[2];
byte[] byte_data_len = new byte[4];
byte[] byte_dataval = new byte[20];
byte[] byte_num_sensor = new byte[4];
byte[] byte_num_time = new byte[4];
byte[] byte_num_dest = new byte[4];
byte[] byte_val = new byte[8];
System.arraycopy(data, 0, byte_protocol, 0, 4);
if (byte2int(byte_protocol) == tmp_protocol) {
System.out.println("protocol validation successful!");
this.protocol = byte2int(byte_protocol);
} else {
System.out.println("protocol validation failed!");
return false;
}
System.arraycopy(data, 12, byte_data_len, 0, 4);
if (byte2int(byte_data_len) + 16 == len) {
System.out.println("the length of received data is correct!");
this.len = byte2int(byte_data_len);
} else {
System.out.println("the length of received data is incorrect!");
return false;
}
System.arraycopy(data, 4, byte_time, 0, 8);
for (int i = 0; i < 6; i++) {
System.out.print(byte_time[i] + ",");
}
System.arraycopy(byte_time, 6, byte_time_mill, 0, 2);
System.out.println(byte2short(byte_time_mill));
dt.wYear = byte_time[0];
dt.wMonth = byte_time[1];
dt.wDay = byte_time[2];
dt.wHour = byte_time[3];
dt.wMinute = byte_time[4];
dt.wSecond = byte_time[5];
dt.wMilliseconds = byte2short(byte_time_mill);
for (int i = 0; i < 6; i++) {
System.arraycopy(data, 16 + i * 20, byte_num_sensor, 0, 4);
System.arraycopy(data, 16 + i * 20 + 4, byte_num_time, 0, 4);
System.arraycopy(data, 16 + i * 20 + 8, byte_num_dest, 0, 4);
System.arraycopy(data, 16 + i * 20 + 12, byte_val, 0, 8);
dataval[i].num_sensor = byte2int(byte_num_sensor);
dataval[i].num_time = byte2int(byte_num_time);
dataval[i].num_dest = byte2int(byte_num_dest);
dataval[i].val = getDouble(byte_val);
System.out.println("dataval[i].num_sensor is :" + dataval[i].num_sensor);
System.out.println("dataval[i].num_time is :" + dataval[i].num_time);
System.out.println("dataval[i].num_dest is :" + dataval[i].num_dest);
System.out.println("dataval[i].val is :" + dataval[i].val);
System.out.println("............................................");
}
return true;
}
public void display() {
System.out.println("this.len is :"+this.len);
System.out.println("dt.wYear is :" + dt.wYear);
System.out.println("dt.wMonth is :" + dt.wMonth);
System.out.println("dt.wDay is :" + dt.wDay);
System.out.println("dt.wHour is :" + dt.wHour);
System.out.println("dt.wMinute is :" + dt.wMinute);
System.out.println("dt.wSecond is :" + dt.wSecond);
System.out.println("dt.wMilliseconds is :" + dt.wMilliseconds);
for(int i=0;i<6;i++) {
System.out.println("dataval[i].num_sensor is :" + dataval[i].num_sensor);
System.out.println("dataval[i].num_time is :" + dataval[i].num_time);
System.out.println("dataval[i].num_dest is :" + dataval[i].num_dest);
System.out.println("dataval[i].val is :" + dataval[i].val);
System.out.println("............................................");
}
}
@Override
public String toString() {
//return "Member [name=" + name + ", age=" + age + ", birthday=" + birthday + ", soruce=" + soruce + "]";
return "11 Member ";
}
}DATAVAL.java类中内容如下：
package com.lenovo.random;
import java.io.Serializable;
public class DATAVAL implements Serializable{
int num_sensor;// 传感器序号
int num_time; // 时间序号
int num_dest; // 目的端序号
double val; // 数值
}DATATIME.java中内容如下：
package com.lenovo.random;
import java.io.Serializable;
public class DATATIME implements Serializable{
int wYear;
int wMonth;
int wDay;
int wHour;
int wMinute;
int wSecond;
int wMilliseconds;
}BeanUtils.java类中内容如下：
package com.lenovo.random;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
public class BeanUtils {
private BeanUtils(){}
/**
* 对象转字节数组
* @param obj
* @return
*/
public static byte[] ObjectToBytes(Object obj){
byte[] bytes = null;
ByteArrayOutputStream bo = null;
ObjectOutputStream oo = null;
try {
bo = new ByteArrayOutputStream();
oo = new ObjectOutputStream(bo);
oo.writeObject(obj);
bytes = bo.toByteArray();
} catch (IOException e) {
e.printStackTrace();
}finally {
try {
if(bo!=null){
bo.close();
}
if(oo!=null){
oo.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return bytes;
}
/**
* 字节数组转对象
* @param bytes
* @return
*/
public static Object BytesToObject(byte[] bytes){
Object obj = null;
ByteArrayInputStream bi = null;
ObjectInputStream oi = null;
try {
bi =new ByteArrayInputStream(bytes);
oi =new ObjectInputStream(bi);
obj = oi.readObject();
} catch (Exception e) {
e.printStackTrace();
}finally {
try {
if(bi!=null){
bi.close();
}
if(oi!=null){
oi.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return obj;
}
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