server.java

3种用Java写的算法 其中包括了DES凯撒 编译软件用的是Intell J IDEA

/**
 * Created by IntelliJ IDEA.
 * User: ${040421220 郑天南}
 * Date: 2007-4-12
 * Time: 14:53:34
 */

import java.net.ServerSocket;
import java.net.Socket;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;

public class Server
{
    public static void main(String[] args)
    {
        try
        {
            int i=1;
            ServerSocket server=new ServerSocket(6629);
            for(;;)
            {
                Socket incoming=server.accept();
                Thread t=new ThreadedEchoHandler(incoming,i);
                t.start();
                i++;
            }
        }
        catch(IOException ex)
        {
            ex.printStackTrace();
        }
    }
}

class ThreadedEchoHandler extends Thread
{
     public ThreadedEchoHandler(Socket i,int c)
    {
        client=i;
        counter=c;
    }

    public void run()
    {
        try
        {
            BufferedReader in=new BufferedReader(new InputStreamReader(client.getInputStream()));
            boolean more=true;
            int i=0;
            while(more)
            {
                String text=in.readLine();
                if(text!=null)  //important!!!
                {

                   System.out.println(text);
                   
                }
                else
                {
                    more=false;
                }
            }

            //回发消息
            PrintWriter textsend=new PrintWriter(client.getOutputStream());
            textsend.println("You are the :"+counter+" Client");
            textsend.flush();

            client.close();
        }
        catch(Exception ex)
        {
            ex.printStackTrace();
        }
    }

    private Socket client;
    private int counter;
    private String[] names=new String[100];
}