網路程式設計..hw11-java的client端連到 java的server端－新手媽媽成長紀錄

//Ftp Client

import java.io.*;
import java.net.*;

public class Client13_4 {
int i;
static String iaddr;
static int port;
static String infilename;

public Client13_4() {
     try{
         Socket socket=new Socket(InetAddress.getByName(iaddr),port);
         DataOutputStream outstream = new DataOutputStream(socket.getOutputStream());

         FileInputStream fis = new FileInputStream(infilename);
         while((i=fis.read()) !=-1)
              outstream.writeInt(i);
         outstream.writeInt(i);

         System.out.println("Data sent to internet successfully!");
         socket.close();
      }

      catch(IOException e){
         System.out.println(e.getMessage());
      }
}

public static void main(String args[]) {
      if (args.length < 3){
         System.out.println("USAGE: java Client13_4 [iaddr] [port] [infilename]");
         System.exit(1);
      }

      iaddr = args[0];
      port=Integer.parseInt(args[1]);
      infilename = args[2];
      Client13_4 ClientStart=new Client13_4();
}
}

==============================================================

//FTP server

import java.net.*;
import java.io.*;

public class Server13_4 {
int messagein;
static int port;
static String outfilename;

public Server13_4() {
     try{
         ServerSocket SS = new ServerSocket(port);
         System.out.println("Server is created and waiting Client to connect...");

         Socket socket = SS.accept();
         System.out.println("Client IP = " +
                             socket.getInetAddress().getHostAddress());

DataInputStream instream = new DataInputStream(socket.getInputStream());
FileOutputStream fos = new FileOutputStream(outfilename);

         while(messagein != -1){
              messagein = instream.readInt();
              fos.write(messagein);
          }
         System.out.println("Data written to File successfully!");
      }
      catch(IOException e){
          System.out.println(e.getMessage());
      }
}

public static void main(String args[]){
         if(args.length < 2){
            System.out.println("Usage: java Server13_4 [port] [outfilename]");
            System.exit(1);
         }
         port=Integer.parseInt(args[0]);
         outfilename = args[1];
         Server13_4 ServerStart=new Server13_4();
}
}