ServerSocket and Socket, serversocketsocket

ServerSocket and Socket, serversocketsocket
Preface

A Server and Client communication demo is provided with ServerSocket and Socket, and several common classes under java.net and java. io packages are used in this demo.

 

Server

Import java.net. *; import java. io. *; public class HttpServer {public static void main (String [] args) {new HttpServer (). start () ;}private ServerSocket serversocket = null; public HttpServer () {try {serversocket = new ServerSocket (5000); // listen to the socket request System on the client port 5000. out. println ("server startup");} catch (IOException e) {e. printStackTrace () ;}} public void start () {Socket socket = null; while (true) {try {socket = serve Rsocket. accept (); // accept the client request socket System. out. println ("address:" + socket. getInetAddress () + ":" + socket. getLocalPort (); OutputStream OS = socket. getOutputStream (); BufferedWriter bw = new BufferedWriter (new OutputStreamWriter (OS); // send a message bw to the client. write ("test server communication \ n"); bw. flush ();} catch (IOException e) {e. printStackTrace (); System. out. println ("disconnected");} finally {try {if (socket! = Null) {socket. close () ;}} catch (IOException e ){}}}}}

Client

import java.net.*;import java.io.*;public class Client{        public static void main(String[] args){        Socket socket=null;        try{            socket =new Socket("127.0.0.1",5000);                                    InputStream is =socket.getInputStream();            InputStreamReader isr=new InputStreamReader(is);            BufferedReader br =new BufferedReader (isr);            String mess=br.readLine();                        System.out.println("mess:"+mess);        }catch(IOException e){            e.printStackTrace();        }finally{            try{                if(socket !=null){                    socket.close();                }            }catch(IOException e){                            }        }            }    }

Summary

Several common classes in the java.net package:

ServerSocket,

Socket,

OutputStream, InputStream,

InputStreamReader, OutputStreamWriter,

BufferedReader, BufferedWriter,

InetAddress,