Create Handler.java

The standalone Java program

Author: Rezanoor

Handler.java

@@ -0,0 +1,92 @@
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.sql.*;
+
+/**
+ *
+ * @author Reza Nourbakhsh
+ */
+public class Contact {
+
+ public void ServerProcess()
+ {
+            try
+                {
+                    String STUNAME="";
+                    String ADDRESS="";
+                    String POSTCODE="";
+                    String EMAIL="";
+
+
+                    DatagramSocket serverSocket = new DatagramSocket(9875);
+                    byte[] receiveData = new byte[1024];
+                    byte[] sendData = new byte[1024];
+                    while(true)
+                    {
+                        DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
+                        serverSocket.receive(receivePacket);
+                        String sentence = new String( receivePacket.getData());
+                        System.out.println("RECEIVED:" + sentence);
+                        InetAddress IPAddress = receivePacket.getAddress();
+                        int port = receivePacket.getPort();
+                        //Code to retreive data from database
+						boolean FindFlag = false;
+                        try
+                        {
+                            String filename = "STUCONTACT.mdb";
+                            String database = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=";
+                            database+= filename.trim() ;
+
+                            Connection con = DriverManager.getConnection(database,"","");
+
+                            Statement stmt = con.createStatement();
+
+                            ResultSet rs = stmt.executeQuery("SELECT STUNAME,ADDRESS,POSTCODE,EMAIL FROM Contacts where STUID='"+sentence.trim()+"'");
+
+                            while (rs.next()) {
+
+                                STUNAME = rs.getString("STUNAME");
+                                ADDRESS = rs.getString("ADDRESS");
+                                POSTCODE = rs.getString("POSTCODE");
+                                EMAIL = rs.getString("EMAIL");
+							    FindFlag = true;
+                            }
+
+                        }
+                        catch(Exception e)
+                        {
+                            System.out.println("Error Ocurrs");
+                        }
+                        if(FindFlag == true)
+                        {
+                    	    sentence =  STUNAME + ADDRESS + POSTCODE + EMAIL ;
+					    }
+					    else
+					    {
+							sentence =  "There is no student with this code";
+						}
+                        String capitalizedSentence = sentence;
+
+                        //************************************************
+                        sendData = capitalizedSentence.getBytes();
+                        DatagramPacket sendPacket =
+                        new DatagramPacket(sendData, sendData.length, IPAddress, port);
+                        serverSocket.send(sendPacket);
+                        //************************************************
+                    }
+                }
+                catch(Exception e)
+                {
+
+                }
+
+            }
+
+}