자바 소켓 통신 서버단

서버 단

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1. 서버에 JAVA 설치

   yum install java

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2. JAva 설치 확인

    # javac

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3. java 파일 작성

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.text.SimpleDateFormat;
import java.util.Date;
public class TCP_socket_svr 
{
	static byte[]  rbuff 		= new byte[1024]; 
    static int     rbuff_cnt 	= 0;
    
    public static void main(String[] args) 
	{
        
        ServerSocket serverSocket = null;
         
        try
		{
            serverSocket = new ServerSocket(50001);
            System.out.println(getTime());
        } 
		catch (IOException e) 
		{
            e.printStackTrace();
        }
        
        while (true)
		{
            try
			{
                System.out.println(getTime() + " Wait For Client..");
				
                Socket socket = serverSocket.accept();
                System.out.println("Request time : " + getTime() + "/ From : " + socket.getInetAddress());
    			
				InputStream in = socket.getInputStream();
				
				// Read From Client
				rbuff_cnt = in.read(rbuff);
				fn_Display(rbuff, rbuff_cnt);
				
				System.out.println("End..");
				
				in.close();
                socket.close();
            }
			catch (IOException e)
			{
                e.printStackTrace();
            }
        }
    }
    static private void fn_Display(byte buf[], int cnt)
    {
        int i;
        System.out.println("============= Read Start ===============");
        System.out.println("---> Count:" + cnt);
        
        for(i=0; i<cnt; i++)
        {
        	System.out.println(String.format("%02X ", buf[i]));
        	System.out.println("I:" + i);
        }
        
        System.out.println("============= Read End ===============");
    }
    
    
    static String getTime() 
	{
        SimpleDateFormat f = new SimpleDateFormat("[hh:mm:ss]");
        return f.format(new Date());
    }
}


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4. 컴파일

# javac 파일명.java

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5. 실행

# java 파일명