Socket编程

                   Socket编程
服务器端：

import java.net.ServerSocket;
import java.net.Socket;
import java.io.*;
public class HelloServer{
	
	
	public static void main(String args[])throws Exception{
		
		ServerSocket serverSocket=new ServerSocket(8888);
		System.out.println("正在等待客户端的连接....");
		Socket socket=null;
		BufferedReader input=null;
		PrintStream pt=null;
	  String str;
		boolean flag=true;
		socket=serverSocket.accept();
		while(flag){
			   
			   input=new BufferedReader(new InputStreamReader(socket.getInputStream()));
			   pt=new PrintStream(socket.getOutputStream());
			   str=input.readLine();
			   if(str.equals("exit")||str==null){
			  	
			  	flag=false;
			  	input.close();
			  	pt.close();
			  	
			  }else{
			    pt.println("Ecno:"+str);
			  	
			  	
			  }
			
			
		}
		socket.close();
		serverSocket.close();
		
	 }
	
	
	}

客户端：

import java.net.*;
import java.io.*; 
public class HelloClient{
	
	
	public static void main(String args[])throws Exception{
		Socket socket=new Socket("localhost",8888);
		BufferedReader input=null;
		BufferedReader keyBord=null;
		PrintStream out=null;
		
		boolean flag=true;
		while(flag){
			 input=new BufferedReader(new InputStreamReader(socket.getInputStream()));
			 keyBord=new BufferedReader(new InputStreamReader(System.in));
	     out=new PrintStream(socket.getOutputStream()); 		
			 String str;
			 
			 str=keyBord.readLine();
			 if(str.equals("bye")||str.equals("exit")){
			 	 flag=false;	
			 }else{
			 	out.println(str);
			 	System.out.println(input.readLine());
			 	}
		 }
		 out.close();
		 socket.close();
		
		
		}
	
	
	
	
	}