java2--TCP最簡單的應用【例】

TCP

//tcp協議鏈接
//2012.8.9
import java.net.*;
import java.io.*;
public class ServerDemo {
	public static void main(String args[])throws Exception{
		ServerSocket server = null;     		//服務端
		Socket clint = null;					//客戶端
		server = new ServerSocket(8888);
		while(true){
			System.out.println("服務器等待連接，端口8888");
			clint = server.accept();
			new Thread(new EchoThread(clint)).start();
		}
		//server.close();
	}
}
class EchoThread implements Runnable{
	private Socket clint = null;
	public EchoThread(Socket clint){
		this.clint = clint;	
	}
	public void run(){
		BufferedReader in = null;
		PrintStream out = null;
		try{
			in = new BufferedReader(new InputStreamReader(clint.getInputStream()));
			out = new PrintStream(clint.getOutputStream());
			boolean flag = true;
			while(flag){
				String arg = in.readLine();
				if("bye".equals(arg)){
					flag = false;	
				}else{
					out.println("ECHO:" + arg);
				}
			}
			clint.close();
		}catch(Exception e){}
	}	
}