java socket编程案例

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.*;


public class Client {
	
	public static void main(String args[]) throws UnknownHostException, IOException{
		
		try{
		//向本机的10000端口发出客户请求
		Socket socket=new Socket("127.0.0.1",10000);
		
		//由系统标准输入设备构造BufferedReader对象
		BufferedReader sin = new BufferedReader(new InputStreamReader(System.in));
		
		//由Socket对象得到输出流，并构造PrintWriter对象
		PrintWriter os=new PrintWriter(socket.getOutputStream());
		
		//由Socket对象得到输入流，并构造相应的BufferedReader对象
		BufferedReader is=new BufferedReader(new InputStreamReader(socket.getInputStream()));
		
		String readline;
		
		readline=sin.readLine();
		
		while(!readline.equals("bye")){
			//将从系统标准输入读入的字符串输出到Server
			os.println(readline);
			
			//刷新输出流，使Server马上收到该字符串
			os.flush();
			
			//在系统标准输出上打印读入的字符串
			System.out.println("Client:"+readline);
			
			//从Server读入一字符串，并打印到标准输出上
			System.out.println("Server:"+is.readLine());
			
			 //从系统标准输入读入一字符串
			readline=sin.readLine(); //从系统标准输入读入一字符串
			
		}
		os.close(); //关闭Socket输出流

		is.close(); //关闭Socket输入流

		socket.close(); //关闭Socket
		
		}catch (Exception e) {
			System.out.println("出错");
		}
		
	}
	
	

}

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;


public class ClientServer {
	public static void main(String args[]){
	//
		ServerSocket server=null;
	try {
		server = new ServerSocket(10000);
		//创建一个ServerSocket在端口10000监听客户请求
		
	} catch (Exception e) {
		// TODO Auto-generated catch block
		System.out.println("can not listen"+e);
	}
	
	Socket socket=null;
	
	try {
		socket = server.accept();
		
	} catch (IOException e) {
		// TODO Auto-generated catch block
		System.out.println("erro"+e);
	}
	String line;
	try {
		//由Socket对象得到输入流，并构造相应的BufferedReader对象
		BufferedReader is=new BufferedReader(new InputStreamReader(socket.getInputStream()));
		
		//由Socket对象得到输出流，并构造PrintWriter对象
		PrintWriter os=new PrintWriter(socket.getOutputStream());
		
		//由系统标准输入设备构造BufferedReader对象
		BufferedReader sin=new BufferedReader(new InputStreamReader(System.in));
		
		//在标准输出上打印从客户端读入的字符串
		System.out.println("Client:"+is.readLine());
		
		//从标准输入读入一字符串
		line=sin.readLine();
		
		while(!line.equals("bye")){
			//向客户端输出该字符串
			os.println(line);
			
			//刷新输出流，使Client马上收到该字符串
			os.flush();
			
			//在系统标准输出上打印读入的字符串
			System.out.println("Server:"+line);
			
			//从Client读入一字符串，并打印到标准输出上
			System.out.println("Client:"+is.readLine());
			
			//从系统标准输入读入一字符串
			line=sin.readLine();
			
			
		}
		
		os.close();
		is.close();
		socket.close();
		server.close();
		
		
	} catch (IOException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
	
	}
				
}