ServerSocket and Socket

Preface

Use ServerSocket and Socket to make a demo for Server and Client communication, and learn to use several commonly used classes under the java.net and java.io packages in this demo process.

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 for socket request System.out.println on client port 5000 ("server startup") } catch (IOException e) {e.printStackTrace ();}} public void start () {Socket socket=null; while (true) {try {socket=serversocket.accept (); / / accept 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 to the client bw.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 commonly used classes in the java.net package:

ServerSocket 、

Socket 、

OutputStream 、 InputStream 、

InputStreamReader 、 OutputStreamWriter 、

BufferedReader 、 BufferedWriter 、

InetAddress 、