jbdorderserver.java

Java程序设计技巧与开发实例附书源代码。

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

public class JBDOrderServer
{
   protected final static String CLIENT_ID = "JBDOrderClient";
   protected final static double CLIENT_VERSION = 1.0;
   protected final static String SERVER_ID = "JBDOrderServer";
   protected final static double SERVER_VERSION = 1.0;
   protected final static String HOST = "localhost";
   protected final static int PORT = 5670;

   private boolean terminated = false;
   private PrintWriter out;

   public JBDOrderServer()
   {
      try
      {
         out = new PrintWriter(new FileWriter("JBDOrder.dat", true));
      }
      catch (IOException ioe)
      {
         System.err.println("Error opening data output file(s)");
      }
      start();
   }

   public void start()
   {
      try
      {
         ServerSocket server = new ServerSocket(PORT);
         System.out.println(SERVER_ID + " " + SERVER_VERSION + " ready ...");
         while (!terminated)
         {
            Socket connection = server.accept();
            JBDOrderServerThread handler =
                new JBDOrderServerThread(this, connection);
         }
         System.out.println(SERVER_ID + " shutting down.");
         server.close();
      }
      catch (IOException ioe)
      {
         System.err.println("Error establishing server and streams");
      }
      finally
      {
         out.close();
      }
   }

   public synchronized void writeOrder(CatalogOrder order)
   {
      out.println(order.exportData());
      out.flush();
   }

   public static void main(String args[])
   {
      JBDOrderServer server = new JBDOrderServer();
   }

}