Credif card Transactions in java

Hi

I need to do one application on credit card transactions.

We have already have shopping cart applicatin.

After adding all(selected ) items i need to pay the amount using credit card.In that i need to check the following validations.

1.Credit Card Authentication:This is to ensure is there any card fraud given by the cardholder's details and to verify that card details are correct.

2.- Payment Authorization :Payment authorisation is used to ensure that the cardholder has sufficient funds available against their line of credit. The full amount of the order is sent to the card Issuing Bank to verify the details against the cardholder's card account. The authorisation does not debit funds from the cardholders account, but reserves the total amount, ready for the capture transaction to debit the card and transfer the funds to your account.

For the reference purpose can any one pls let me the know the useful sites for the source code .

Thanks in advance

mallika

[1029 byte] By [malli_mcachia] at [2007-10-3 4:35:13]