socket ( java ) 簡易用戶端、服務端通訊

原創作品，允許轉載，轉載時請務必以超連結形式標明文章 原始出處 、作者資訊和本聲明。否則將追究法律責任。http://blog.csdn.net/love254443233/article/details/7881886

實現:

用戶端：用兩個socket（兩個連接埠），一個用於接收服務端發送過來的訊息，一個用於向服務端發送訊息。

服務端：用兩個socket，一個用於接收用戶端發送過來的訊息，一個用於接收訊息手自動向用戶端發送訊息。

註：可單獨運行SocketServer與SocketClient；

1、SocketServer類：

package org.jivesoftware.openfire.plugin.test;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.ServerSocket;import java.net.Socket;import java.net.UnknownHostException;public class SocketServer implements Runnable {public int hostPort = 5000;public int remotePort = 5001;public boolean sendMessage=false;public String remoteAddress="localhost";public static void main(String args[]){SocketServer socketServer=new SocketServer();socketServer.run();}public void run() {Socket socket=null;ServerSocket server=null;InputStream is=null;OutputStream os=null;try { server = new ServerSocket(hostPort); socket = server.accept();System.out.println(socket);is = socket.getInputStream();byte[] bytes;while (true) {bytes = new byte[2048];int n = is.read(bytes);System.out.print(new String(bytes, 0, n));if(sendMessage)sendMessage();}} catch (Exception e) {e.printStackTrace();}try {if (socket != null)socket.close();if(is!=null)is.close();if(os!=null)os.close();if(server!=null)server.close();} catch (IOException e) {e.printStackTrace();}}public void sendMessage() {Socket socket = null;OutputStream outputStream = null;int i = 0;String string = "這裡是伺服器。。。";try {socket = new Socket(remoteAddress, remotePort);outputStream = socket.getOutputStream();outputStream.write((string + (i++)+"\n").getBytes());outputStream.flush();} catch (UnknownHostException e1) {try {if (socket != null)socket.close();if (outputStream != null)outputStream.close();} catch (IOException e) {e.printStackTrace();}System.out.println("伺服器連接埠沒開。。");e1.printStackTrace();} catch (IOException e1) {e1.printStackTrace();}}}

2、SocketClient類：

package org.jivesoftware.openfire.plugin.test;import java.io.IOException;import java.io.OutputStream;import java.net.Socket;import java.net.UnknownHostException;import java.util.Date;public class SocketClient implements Runnable {public static void main(String args[]) {SocketClient socketClient = new SocketClient();socketClient.run();}public int remotePort = 5000;public String remoteAddress = "localhost";public SocketClient() {}public void run() {Socket socket = null;OutputStream outputStream = null;try {socket = new Socket(remoteAddress, remotePort);outputStream = socket.getOutputStream();outputStream.write(("connect to the server at time " + new Date().toString()+"\n").getBytes());outputStream.flush();System.out.println(socket);byte[] buffer;int size = 0;while (true) {System.out.println("input:");buffer = new byte[2048];size = System.in.read(buffer);if (size > 0) {outputStream.write(new String(buffer, 0, size).getBytes());outputStream.flush();}}} catch (UnknownHostException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}try {if (socket != null)socket.close();if (outputStream != null)outputStream.close();} catch (IOException e) {e.printStackTrace();}}}

3、TCPServer類：

package org.jivesoftware.openfire.plugin.test;import socket.SocketServer;public class TCPServer {private static SocketServer socketServer;public static void main(String[] args){socketServer = new SocketServer();socketServer.hostPort=5000;socketServer.remotePort=5001;socketServer.sendMessage=true;Thread serverThread = new Thread(socketServer);/*socketClient = new SocketClient();socketClient.remotePort=5001;//socketClient.setStr("TCPServer:");Thread clienThread = new Thread(socketClient);clienThread.start();*/serverThread.start();System.out.println("伺服器啟動完成:");}}

4、TCPClent類:

package org.jivesoftware.openfire.plugin.test;import socket.SocketClient;import socket.SocketServer;public class TCPClent {private static SocketServer socketServer;private static SocketClient socketClient;public static void main(String[] args) {socketServer = new SocketServer();socketServer.hostPort=5001;socketServer.remotePort=5000;socketServer.sendMessage=true;Thread serverThread = new Thread(socketServer);socketClient = new SocketClient();socketClient.remotePort=5000;Thread clienThread = new Thread(socketClient);clienThread.start();serverThread.start();System.out.println("伺服器啟動完成:");}}

本文方法存在一些問題，其改進版，見：http://blog.csdn.net/love254443233/article/details/7897269（多線程、多用戶端）