net17_4.java

很有用的课件

/**
 * Filename:Net17_4
 * Description:
 * Copyright:    Copyright (c) 2002
 * Company:
 * @author:Liyunshan
 * @version 1.0
 */

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

public class Net17_4
{
	public static void main(String args[]) throws IOException
	{
	  	ServerSocket serverSocket = new ServerSocket(3434);
	  	Socket server = null;
	  	try
	  	{
			server = serverSocket.accept();
			try
			{
				BufferedReader input = new BufferedReader(new
					InputStreamReader(System.in));
				BufferedReader in = new BufferedReader(new
					InputStreamReader(server.getInputStream()));
				PrintWriter out = new PrintWriter(new
					OutputStreamWriter(server.getOutputStream()));
				String serverString = null;
				String clientString = null;
				System.out.println("Hello! Enter bye to exit.");
				System.out.print("Server : ");
				serverString = input.readLine();
				boolean done = false;
				while (!done)
				{
					if (serverString != null)
					{
						out.println(serverString);
						out.flush();
					}
					clientString = in.readLine();
					if (clientString != null)
						System.out.println("Client : " + clientString);
					System.out.print("Server : ");
					serverString = input.readLine();
					if (serverString.equals("bye")) done = true;
				}
				in.close();
				out.close();
			}
			finally { server.close(); }
		}
		finally { serverSocket.close(); }
	}
}