jabberserver.java

一个基于tcp/ip的程序

import java.io.*;
import java.net.*;
public class JabberServer
{	//从1-1024范围之外选择一个端口号
	public static final int PORT=8080;
	public static void main(String[] args)throws IOException
	{
		int i;
		for(i=0;;i++){
		ServerSocket s=new ServerSocket(PORT);
		System.out.println("Started:"+s);
		try
		{
			//堵塞直到产生一个连接.
			Socket socket=s.accept();
			try
			{
				System.out.println("Connection accepted:"+socket);
				BufferedReader in=new BufferedReader(new InputStreamReader(socket.getInputStream()));
				//由PrintWriter自动刷新Output
				PrintWriter out=new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())),true);
				while(true)
				{
					String str=in.readLine();
					if(str.equals("END"))break;
					System.out.println("Echoing:"+str);
					//out.println(str);
					out.println("Server Echoing:ok");
				}
			}
		finally
		{
			System.out.println("closing...");
			socket.close();//关闭套接字
		}
	}
	finally
	{
		s.close();
	}	}
}
}