OrderServletpublic class OrderServlet extends HttpServlet | OrderServlet implements order processing for Acme Widgets.
This dummy version just generates a thank-you notice. |
| Methods Summary |
|---|
| public void | doPost(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)doPost() processes one POST request.
Assuming weve been installed correctly, this can only
come from the order page, so we blindly respond,
without much validation of the order :-)
resp.setContentType("text/html");
PrintWriter out = resp.getWriter();
String cardType = req.getParameter("cardType");
String cardNumber = req.getParameter("cardNumber");
String expMonth = req.getParameter("expMonth");
String expYear = req.getParameter("expYear");
// Simple validation.
if (cardType == null || cardNumber == null ||
cardNumber.length() == 0 ||
expMonth == null || expYear == null) {
make_reply(false, out, "Acme Widgets: Thanks for trying...",
"Error!",
"<P>We need a credit card type <B>and</B> a " +
"valid credit card number, as well as the expiration "+
"month and year. Please click your " +
"browsers <I>Back</I> button and try again.\n" +
"<P>Again, thank you for your order.");
return;
}
// Code here to phone the bank and validate the card.
// Now make a nice thankyou to the user
make_reply(true, out, "Acme Widgets: Thank you for your order",
"Thank you for your credit card order",
"We will bill it to your " + cardType + " credit card" +
" which expires " + expMonth + "/" + expYear +
"<P>Wile E. Coyote will process your order " +
"as soon as he returns from his latest trip " +
"to the bottom of the Grand Canyon.</P>");
return;
| | public java.lang.String | getServletInfo()Some Servlet engines use this to report on the servlet
return "Acme Widgets Credit Card Validation";
| | void | make_reply(boolean cardIsApproved, java.io.PrintWriter os, java.lang.String title, java.lang.String h1, java.lang.String txt)Common code to generate a reply
// There would be code here to log the approve/deny status
// Now make up the reply to the user.
os.print("<HTML><HEAD>");
os.print("<TITLE>");
os.print(title);
os.print("</TITLE>");
os.print("<BODY><H1>");
os.print(h1);
os.print("</H1>");
os.print(txt);
os.print("</BODY></HTML>");
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