代码1

import java.io.*;
import java.net.*;
public class multiClient{
	public static void main(String args[]){
		System.out.println("Client:");
		try{
			Socket socketClient=new Socket("127.0.0.1",4700);
			//向本机的4700端口发送客户请求
			BufferedReader sin
					=new BufferedReader(new InputStreamReader(System.in));
			//由系统标准设备（键盘）构造BufferedReader对象
			PrintWriter os=new PrintWriter(socketClient.getOutputStream());
			//由Socket对象得到输出流，构造printwrite对象
			BufferedReader is=new BufferedReader
					(new InputStreamReader(socketClient.getInputStream()));
			//由Socket对象得到输入流，构造BufferedReader对象
			String readline;
			readline=sin.readLine();
			//从系统标准输入读入一段字符串
			while(!readline.equals("bye")){//直到读到bye结束
				os.println(readline);
				//输出到Server
				os.flush();
				//刷新输出流，使Server马上收到字符串
				System.out.println("Client:"+readline);
				//在本Client输出改字符串
				System.out.println("Server:"+is.readLine());
				//输出Server发来的字符串
				readline=sin.readLine();
				//继续读键盘输入的字符串
				
			}
			os.close();//关闭输入输出流
			is.close();
			socketClient.close();
						
		}catch(Exception e){
			System.out.println("Error "+e); 
			
		}
	}
}