java socket的用法

Socket是两个程序进行数据交换的端点，以下用server和client简单介绍socket的用法。

MyClient.java

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.Socket;public class MyClient {public static void main(String[] args){PrintWriter out = null;BufferedReader in,sin;try{//"127.0.0.1" is local IP,8000 is communication portSocket socket=new Socket("127.0.0.1",8000);//socket output streamout=new PrintWriter(socket.getOutputStream());//socket input streamin=new BufferedReader(new InputStreamReader(socket.getInputStream()));//input stream from the keyboardsin=new BufferedReader(new InputStreamReader(System.in));String s;do{s=sin.readLine();//write to the socket output streamout.println(s);out.flush();//if the communication is not over,print the server's response if(!s.equals("bye")){System.out.println("@Server response: "+in.readLine());}//else the communication is over,print notification,shut down streamelse{System.out.println("The connection is closing.....");}}while(!s.equals("bye"));out.close();in.close();socket.close();}catch(Exception e){System.out.println("Error:"+e);}}} 

MyServer.java

 

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 MyServer {public static void main(String[] args) {// TODO Auto-generated method stubtry {//establish Server socket and wait for the connection request//建立Server Socket并等待连接请求ServerSocket server = new ServerSocket(8000);Socket socket = server.accept();BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));PrintWriter out = new PrintWriter(socket.getOutputStream());BufferedReader sin = new BufferedReader(new InputStreamReader(System.in));/*先读取Client发送来的数据，然后从标准输入流读取数据并发送给Client，当从Client那里接受到bye时关闭连接*/String s;while (!(s = in.readLine()).equals("bye")) {System.out.println("#Received from Client: " + s);out.println(sin.readLine());out.flush();}System.out.println("The connection is closing......");in.close();out.close();socket.close();server.close();} catch (IOException e) {System.out.println("Error:" + e);}}}