netclient.java

来自「client server using socket programing 」· Java 代码 · 共 46 行

// NetClient matching the NetEcho program -- lars appel 22.feb.99 / 25.apr.99

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

class NetClient
{
  // opens tcp connection to NetEcho server, requests a number of lines and
  // displays the response received. Optional args are N and target host.
  
  static final int PORT = 3030;
  
  public static void main( String args[] )
    throws Exception
  {
    String req = (args.length >= 1) ? args[0] : "3";
    String dst = (args.length >= 2) ? args[1] : "127.0.0.1";

    Socket sock = new Socket( dst , PORT );

    PrintWriter w =
      new PrintWriter (sock.getOutputStream(), true);  // autoFlush

    BufferedReader r =
      new BufferedReader (new InputStreamReader (sock.getInputStream()) );

    w.println (req);

    while (true)
    {
      String s = r.readLine();

      if (s != null)
        System.out.println (s);
      else
        break;
    }

    r.close();
    w.close();

    sock.close();
  }
}