12. 11. 07 네트워크

* 시험 : 이 통신의 순서 쓰기

1. 서버

import java.io.*;

import java.net.*;

public class Server

{

public static void main(String[] args)

{

try

{

int port = Integer.parseInt(args[0]);

ServerSocket ss = new ServerSocket(port);

while (true)

{

Socket s = ss.accept();

OutputStream os = s.getOutputStream();

DataOutputStream dos = new DataOutputStream(os);

for (int i = 1; i <= 10; i++)

{

dos.writeInt(i);

}

s.close();

}

} 

catch (Exception e)

{

System.out.println("Exception : " + e);

}

}

}

클라이언트

import java.*;

import java.net.*;

import java.io.*;

public class console

{

public static void main(String args[]) 

{

try

{

String server = args[0];

int port = Integer.parseInt(args[0]);

Socket c = new Socket(server, port);

InputStream is = c.getInputStream();

DataInputStream dis = new DataInputStream(is);

for (int i = 1; i <= 10; i++)

{

int j = dis.readInt();

System.out.println("서버로부터 받은 데이터 " + j + " 출력");

}

c.close();

} 

catch (Exception e)

{

e.printStackTrace();

}

}

}

2. UDP 서버

import java.*;

import java.net.*;

import java.io.*;

public class console

{

private final static int BUFSIZE = 30;

public static void main(String args[]) 

{

try

{

int port = Integer.parseInt(args[0]);

DatagramSocket ds = new DatagramSocket(port);

while (true)

{

byte buffer[] = new byte[BUFSIZE];

DatagramPacket dp = new DatagramPacket(buffer, buffer.length);

ds.receive(dp);

String str = new String(dp.getData());

System.out.println("수신된 데이터 : " + str);

}

} 

catch (Exception e)

{

e.printStackTrace();

}

}

}

UDP 클라이언트

import java.io.*;

import java.net.*;

public class Server

{

public static void main(String args[])

{

try

{

int port = Integer.parseInt(args[0]);

ServerSocket ss = new ServerSocket(port);

while (true)

{

Socket s = ss.accept();

OutputStream os = s.getOutputStream();

DataOutputStream dos = new DataOutputStream(os);

for (int i = 1; i <= 10; i++)

{

dos.writeInt(i);

}

s.close();

}

} 

catch (Exception e)

{

System.out.println("Exception : " + e);

}

}

}