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POClient-Server connection
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copied!<p>I have a java program that will connect the client to the server. This includes making a file directory once the client had triggered the server through sending a message. For example: Once the server is running already, the client will then connect and will send a msg i.e "Your message: Lady", the server will receive a message like "Request to create a Directory named: Lady", after this a directory will be created named Lady.</p> <p>But the problem is this connection is only for one-to-one. Like only one client can connect to the server...</p> <p>This is the sample code:</p> <pre><code>/* * To change this template, choose Tools | Templates * and open the template in the editor. */ package today._; import java.io.*; import java.net.*; import java.text.*; import java.util.*; public class myServer { protected static final int PORT_NUMBER = 55555; public static void main(String args[]) { try { ServerSocket servsock = new ServerSocket(PORT_NUMBER); System.out.println("Server running..."); while (true) { Socket sock = servsock.accept(); System.out.println("Connection from: " + sock.getInetAddress()); Scanner in = new Scanner(sock.getInputStream()); PrintWriter out = new PrintWriter(sock.getOutputStream()); String request = ""; while (in.hasNext()) { request = in.next(); System.out.println("Request to Create Directory named: " + request); if(request.toUpperCase().equals("TIME")) { try { File file = new File("C:\\" + request); if (!file.exists()) { if (file.mkdir()) { System.out.println("Directory is created!"); } else { System.out.println("Failed to create directory!"); } } } catch (Exception e) { System.out.println(e); } out.println(getTime()); out.flush(); } else { out.println("Invalid Request..."); out.flush(); } } } } catch (Exception e) { System.out.println(e.toString()); } } protected static String getTime() { DateFormat dateFormat = new SimpleDateFormat("HH:mm:ss"); Date date = new Date(); return (dateFormat.format(date)); } } </code></pre> <hr> <pre><code>package today._; import java.io.*; import java.net.*; import java.util.*; public class myClient { protected static final String HOST = "localhost"; protected static final int PORT = 55555; protected static Socket sock; public static void main(String args[]) { try { sock = new Socket(HOST,PORT); System.out.println("Connected to " + HOST + " on port " + PORT); Scanner response = new Scanner(sock.getInputStream()); PrintWriter request = new PrintWriter(sock.getOutputStream()); BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); String txt = ""; while(!txt.toUpperCase().equals("EXIT")) { System.out.print("Your message:"); txt = in.readLine(); request.println(txt); request.flush(); System.out.println(response.next()); } request.close(); response.close(); in.close(); sock.close(); } catch(IOException e) { System.out.println(e.toString()); } } } </code></pre>

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