【java】网络编程实例 UDP协议编写客户端和服务器端间的对象的数据传输

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.net.DatagramPacket;
import java.net.DatagramSocket;

public class ReceiveDemo {
    public static void main(String[] args) throws IOException, ClassNotFoundException {
        //1.创建接收端Socket对象
        DatagramSocket send=new DatagramSocket(6666);
        //2.创建数据包接收对象
        byte[] buf=new byte[1024];
        DatagramPacket datagramPacket=new DatagramPacket(buf,buf.length);
        send.receive(datagramPacket);
        //3.解析数据包，并把数据写入对象
        byte[] data=datagramPacket.getData();
        ByteArrayInputStream bis=new ByteArrayInputStream(data);
        ObjectInputStream ois=new ObjectInputStream(bis);
        Student stu1=(Student)ois.readObject();
        System.out.println(stu1.getName()+":"+stu1.getAge());
        //4.释放资源
        ois.close();
        bis.close();
        send.close();
    }
}

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.net.*;

public class SendDemo {
    public static void main(String[] args) throws IOException {
        //1.创建发送端Socket对象
        DatagramSocket receive=new DatagramSocket(6666);
        //2.创建要发送的对象
        Student stu1=new Student("张三",18);
        //3.创建输出流写入对象
        //ByteArrayOutputStream 对byte类型数据进行写入的类 相当于一个中间缓冲层，将类写入到文件等其他outputStream。
        //此类实现一个字节输出流、其中数据被写入到字节数组中，缓冲区在数据写入时会自动增长，关闭该流无效，关闭此流后调用方法不会有异常
        ByteArrayOutputStream bos=new ByteArrayOutputStream();
        ObjectOutputStream oos=new ObjectOutputStream(bos);
        oos.writeObject(stu1);
        byte[] buf=bos.toByteArray();
        //System.out.println(InetAddress.getLocalHost().getHostAddress()); 获取本机真实IP
        //4.创建数据包并发送资源
        DatagramPacket datagramPacket=new DatagramPacket(buf,buf.length,new InetSocketAddress("172.20.2.154",6666));
        receive.send(datagramPacket);
        //5.释放资源
        bos.close();
        oos.close();
        receive.close();
    }
}