习题-Java网络编程

目录

1.TCP-对象

2.UDP​​​​​​​​​​​​​​

---

1.TCP-对象

利用TCP传输对象信息，需要对对象进行实例化

User类：

package dh09.demo02;

import java.io.Serializable;

public class User implements Serializable {
	private String name;
	private String pwd;
	
	public User() {
	
	}
	public User(String name, String pwd) {

		this.name = name;
		this.pwd = pwd;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getPwd() {
		return pwd;
	}

	public void setPwd(String pwd) {
		this.pwd = pwd;
	}
	
	
}

服务器端：

package dh09.demo02;

import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

//服务器
public class Demo01 {

	public static void main(String[] args) {
		try {
			ServerSocket serverSocket = new ServerSocket(8090);
			Socket socket = serverSocket.accept();
			InputStream iStream = socket.getInputStream();
			
			ObjectInputStream ois = new ObjectInputStream(iStream);
			User user = (User) ois.readObject();
			System.out.println("客户端说："+user.getName()+"-"+user.getPwd());
			//通过输出流给客户端一个响应
			OutputStream os = socket.getOutputStream();
			String reply = "欢迎登陆";
			os.write(reply.getBytes());
			
			os.close();
			ois.close();
			iStream.close();
			socket.close();
			serverSocket.close();
			
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}

客户端：

package dh09.demo02;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.net.Socket;

//客户端
public class Test01 {

	public static void main(String[] args) {
		try {
			Socket socket = new Socket("localhost", 8090);
			OutputStream oStream = socket.getOutputStream();
			ObjectOutputStream oos = new ObjectOutputStream(oStream);
			User user = new User("admin","123456");
			oos.writeObject(user);
			
			socket.shutdownOutput();
			InputStream iStream = socket.getInputStream();
			BufferedReader br = new BufferedReader(new InputStreamReader(iStream));
			String reply;
			while ((reply = br.readLine())!=null) {
				System.out.println("服务器响应说："+reply);
			}
			br.close();
			iStream.close();
			oos.close();
			oStream.close();
			socket.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
		

	}

}

2.UDP

package dh09.UDPDemo;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;

public class ReceiveMessageDemo {

	public static void main(String[] args) {
		//接收数据
		
		
		
		//1.创建DatagramSocket对象
		try {
			DatagramSocket dSocket = new DatagramSocket(10086);
			
			//2.接收数据包
			byte[] b = new byte[1024];
			
			DatagramPacket dPacket = new DatagramPacket(b,b.length);
			
			
			dSocket.receive(dPacket);
			
			//3.解析数据包
			byte[] data = dPacket.getData();
			int len = dPacket.getLength();
			InetAddress address = dPacket.getAddress();
			int port = dPacket.getPort();
			
			System.out.println("接收到数据："+new String(data,0,len));
			System.out.println("该数据是从："+address+"，这台电脑中的："+port+"这个端口号发出的");
			
			
			//4.释放资源
			dSocket.close();
			
		} catch (SocketException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		
	}

}

发送端：

package dh09.UDPDemo;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.net.UnknownHostException;

public class SendMessageDemo {

	public static void main(String[] args) {
		
		try {
			//1.创建DatagramSocket对象
			DatagramSocket dSocket = new DatagramSocket();
			//2.打包数据
			String string = "你好";
			byte[] b = string.getBytes();
			InetAddress address = InetAddress.getByName("127.0.0.1");
			int port = 10086;
			
			DatagramPacket dPacket = new DatagramPacket(b, b.length,address,port);
			//3.发送数据
			dSocket.send(dPacket);
			
			//4.释放资源
			dSocket.close();
			
		} catch (SocketException e) {
			e.printStackTrace();
		} catch (UnknownHostException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	
	}

}