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ATM client server

1 reply on 1 page. Most recent reply: Dec 17, 2005 8:10 AM by sama j

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sama j

Posts: 2
Nickname: lavender
Registered: Nov, 2005

ATM client server Posted: Nov 27, 2005 1:59 PM
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Hallo

I develop an ATM java code I have put everything that i have learned into it and it just seem not to work

the code is about client and server where the server replay to client requests based on a list of choices (check balance, withdrawal,deposit and transfer) the server is connected to a database accessed by protocol through threads

here is the code in case some one wanna help :P

-------------------client
package AtmClient;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;

public class ATMClient {
public static void main(String[] args) throws IOException {

Socket kkSocket = null;
PrintWriter out = null;
BufferedReader in = null;

try {
kkSocket = new Socket("Hostname", 1212);
// System.err.println("Enter the choice and the acount");
out = new PrintWriter(kkSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(kkSocket.getInputStream()));
} catch (UnknownHostException e) {
System.err.println("Don't know about host: Hostname");
System.exit(1);
} catch (IOException e) {
System.err.println("Couldn't get I/O for the connection to:Hostname");
System.exit(1);
}

BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
String fromServer;
String fromUser;

while ((fromServer = in.readLine()) != null) {
System.out.println(fromServer);
if (fromServer.equals("Bye."))
break;

fromUser = stdIn.readLine();
if (fromUser != null) {
//System.out.println("Client: " + fromUser);

out.println(fromUser);
}
}

out.close();
in.close();
stdIn.close();
kkSocket.close();

}
}


---------------------server


package AtmServer;

import java.io.IOException;
import java.net.ServerSocket;


public class ATMMulti {

public static void main(String[] args) throws IOException {

ServerSocket serverSocket = null;
boolean listening = true;

try {
serverSocket = new ServerSocket(1212);
} catch (IOException e) {
System.err.println("Could not listen on port: 1212.");
System.exit(-1);
}

while (listening)
new MultiServerThread(serverSocket.accept()).start();

serverSocket.close();
}

}



--------------------thread

package AtmServer;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;

import Protocol.Protocol;

public class MultiServerThread extends Thread {
private Socket socket = null;

public MultiServerThread(Socket socket) {
super("MultiServerThread");
this.socket = socket;
}

public void run() {

try {
PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
BufferedReader Ch = new BufferedReader(
new InputStreamReader(
socket.getInputStream()));

String inputLine, outputLine="",Choice;
out.println(outputLine);
while ((inputLine = Ch.readLine()) != null) {
Protocol kkp = new Protocol();
out.println("Please select a choice 1 Check Balance,2 Withdrawal,3 Deposit,4 Account Transfer,5 Exit ");


while ((Choice = Ch.readLine()) != null)
{
if (Choice.equals("1"))
{

out.println("Enter Your Card Number");
BufferedReader in = new BufferedReader(
new InputStreamReader(
socket.getInputStream()));
inputLine=in.readLine();
outputLine = kkp.processInput(Choice+inputLine,"");
if(outputLine.substring(0,1).equals("1"))
{
out.println("Your Current Balance Is"+ outputLine.substring(0,1));

}
else if(outputLine.substring(0,1).equals("3"))
{
out.println("Invalid ID card");
}
else if(outputLine.substring(0,1).equals("4"))
{
out.println("Unknown Error");
}
out.println("Please select a choice 1 Check Balance,2 Withdrawal,3 Deposit,4 Account Transfer,5 Exit ");
//in.close();
}
else if (Choice.equals("2"))
{
out.println("Enter Your Card Number");
BufferedReader in = new BufferedReader(
new InputStreamReader(
socket.getInputStream()));
inputLine=in.readLine();
out.println("Enter The Amount For Withdrawal");
BufferedReader Amt = new BufferedReader(
new InputStreamReader(
socket.getInputStream()));
String Amount=Amt.readLine();
outputLine = kkp.processInput(Choice+inputLine+Amount,"");
if(outputLine.substring(0,1).equa ls("1"))
{
out.println("Your Current Balance Is"+ outputLine.substring(1));
}
else if(outputLine.substring(0,1).equals("3"))
{
out.println("Your ID is Not Correct");
}
else if(outputLine.substring(0,1).equals("4"))
{
out.println("Unknown Error");
}
else if(outputLine.substring(0,1).equals("2"))
{
out.println("The Amount Exceeds The limit");
}
out.println("Please select a choice 1 Check Balance,2 Withdrawal,3 Deposit,4 Account Transfer,5 Exit ");
//in.close();
}
else if (Choice.equals("3"))
{
out.println("Enter Your Card Number");
BufferedReader in = new BufferedReader(
new InputStreamReader(
socket.getInputStream()));
inputLine=in.readLine();
out.println("Enter The Amount For Deposit");
BufferedReader Amt = new BufferedReader(
new InputStreamReader(
socket.getInputStream()));
String Amount=Amt.readLine();
outputLine = kkp.processInput(Choice+inputLine+Amount,"");

if(outputLine.substring(0,1).equ als("1"))
{
out.println("Your Current Balance Is"+ outputLine.substring(1));
}
else if(outputLine.substring(0,1).equals("3"))
{
out.println("Your ID is Not Correct");
}
else if(outputLine.substring(0,1).equals("4"))
{
out.println("Unknown Error");
}
else if(outputLine.substring(0,1).equals("2"))
{
out.println("The Amount Exceeds The limit");
}
out.println("Please select a choice 1 Check Balance,2 Withdrawal,3 Deposit,4 Account Transfer,5 Exit ");
//in.close();
}
else if (Choice.equals("4"))
{
out.println("Enter Your Card Number");
BufferedReader in = new BufferedReader(
new InputStreamReader(
socket.getInputStream()));
inputLine=in.readLine();
out.println("Enter The Amount For ");
BufferedReader Amt = new BufferedReader(
new InputStreamReader(
socket.getInputStream()));
String Amount=Amt.readLine();
out.println("Enter The Account No to which to be transferred");
BufferedReader Acc2 = new BufferedReader(
new InputStreamReader(
socket.getInputStream()));
String SecondAccount=Acc2.readLine();
outputLine = kkp.processInput(Choice+inputLine+Amount,SecondAccount);
if(outputLine.substrin g(0,1).equals("1"))
{
out.println("Your Current Balance Is"+ outputLine.substring(1));
}
else if(outputLine.substring(0,1).equals("3"))
{
out.println("Your ID is Not Correct");
}
else if(outputLine.substring(0,1).equals("4"))
{
out.println("Unknown Error");
}
else if(outputLine.substring(0,1).equals("2"))
{
out.println("The Amount Exceeds The limit");
}
out.println("Please select a choice 1 Check Balance,2 Withdrawal,3 Deposit,4 Account Transfer,5 Exit ");
//in.close();

}

else if (Choice.equals("0"))
break;

}
}
out.close();

socket.close();

} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}




-------------------protocol


package Protocol;


import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class Protocol {

public String processInput(String theInput,String SecondAccount) {
String theOutput = "4";
Connection con = null ;

try
{
/* MySQL */

String databaseURL = "jdbc:mysql://localhost/ATM1" ;
String driverName = "com.mysql.jdbc.Driver" ;
String user = "" ;
String password = "" ;

String ID = null;


Class.forName ( driverName ).newInstance();

con = DriverManager.getConnection ( databaseURL , user , password );
ID=theInput;
String selection="";
selection=ID.substring(0,1);
Statement statement ;
statement = con.createStatement();
if (selection.equals("1"))
{
String Card=ID.substring(1);
String selectQuery = "SELECT * FROM customer where Card = '" + Card + "'" ;
ResultSet resultSet = statement.executeQuery ( selectQuery );
if ( resultSet != null ) // Succes
{
while ( resultSet.next() )
{
String Balance = ( String ) resultSet.getObject ( "Balance" ) ;
return theOutput = "1 " +Balance ;
}
}
if(!resultSet.first())
{ resultSet.close();
return theOutput ="3";
}


if ( con != null )
{
con.close();
statement.close();
}


}
else if (selection.equals("2"))
{
String Card=ID.substring(1,17);
float Bal=0;
float Amount= Float.parseFloat((ID.substring(17)));
String selectQuery = "SELECT * FROM customer where Card = '" + Card + "'" ;
ResultSet resultSet = statement.executeQuery ( selectQuery );
if ( resultSet.next() )
{
Bal= Float.parseFloat((String) resultSet.getObject ( "Balance" )) ;
if((Bal-Amount)>=0)
{
String updateQuery = "update customer set Balance=Balance-" + Amount +" where Card ='"+ Card +"'" ;
int temp= statement.executeUpdate(updateQuery);
if (temp==1)
{
return theOutput = "1" + (Bal-Amount) ;
}
else
{
return theOutput = "4"+Bal ;
}
}

else
{
return theOutput = "2"+Bal ;
}
}

else if (!resultSet.next())
{ resultSet.close();
return theOutput ="3";
}

statement.close();

if ( con != null )
{
con.close();

}

if(!resultSet.first())
{ resultSet.close();
return theOutput ="3";
}


if ( con != null )
{
con.close();
statement.close();
}
}
else if (selection.equals("3"))
{
String Card=ID.substring(1,17);
float Bal=0;
float Amount= Float.parseFloat((ID.substring(17)));
String selectQuery = "SELECT * FROM customer where Card = '" + Card + "'" ;
ResultSet resultSet = statement.executeQuery ( selectQuery );
if ( resultSet != null ) // Succes
{
if ( resultSet.next() )
{
Bal= Float.parseFloat((String) resultSet.getObject ( "Balance" )) ;
String updateQuery = "update customer set Balance=Balance+" + Amount +" where Card ='"+ Card +"'" ;
int temp= statement.executeUpdate(updateQuery);
if (temp==1)
{
return theOutput = "1" + (Bal+Amount) ;
}
else
{
return theOutput = "4"+Bal ;
}

}


}
if(!resultSet.first())
{ resultSet.close();
return theOutput ="3";
}

statement.close();

if ( con != null )
{
con.close();

}

if(!resultSet.first())
{ resultSet.close();
return theOutput ="3";
}


if ( con != null )
{
con.close();
statement.close();
}
}
else if (selection.equals("4"))
{
String Card=ID.substring(1,17);
float Bal=0;
float Amount= Float.parseFloat((ID.substring(17)));
String selectQuery = "SELECT * FROM customer where Card = '" + Card + "'" ;
ResultSet resultSet = statement.executeQuery ( selectQuery );
//String selectQuery1 = "SELECT * FROM customer where AcountID = '" + SecondAccount + "'" ;
//ResultSet resultSet1 = statement.executeQuery ( selectQuery1);
if ( resultSet != null ) // Succes
{
if ( resultSet.next() )
{
Bal= Float.parseFloat((String) resultSet.getObject ( "Balance" )) ;
if((Bal-Amount)>=0)
{
String updateQuery = "update customer set Balance=Balance+" + Amount +" where AcountID ='"+ SecondAccount +"'" ;

int temp= statement.executeUpdate(updateQuery);
updateQuery = "update customer set Balance=Balance-" + Amount +" where Card ='"+ Card +"'" ;

temp= statement.executeUpdate(updateQuery);
if (temp==1)
{
return theOutput = "1" + (Bal-Amount) ;
}
else
{
return theOutput = "4"+Bal ;
}
}
else
{
return theOutput = "2"+Bal ;
}

}


}
if(!resultSet.first())
{ resultSet.close();
return theOutput ="3";
}

statement.close();

if ( con != null )
{
con.close();

}

if(!resultSet.first())
{ resultSet.close();
return theOutput ="3";
}


if ( con != null )
{
con.close();
statement.close();
}
}

}

catch ( Exception e )
{
System.err.println ( "Exception: " + e.getMessage() );
}


return theOutput;
}
}


sama j

Posts: 2
Nickname: lavender
Registered: Nov, 2005

Re: ATM client server Posted: Dec 17, 2005 8:10 AM
Reply to this message Reply
No one !!!!!!!!!!

Flat View: This topic has 1 reply on 1 page
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