Ordering Pizza in VS .NET

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Ordering Pizza
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Now we have the customer, we need to order the pizza We'll use the Model 2 architecture in this part of the application, with the servlet OrderMaintenanceS processing client requests and forwarding that data to the JSP page OrderForm j sp for presentation The communication of the data between the two is performed using a JavaBean The JSP specification provides an alternative XML syntax Even though this syntax is designed for use by XML tools, Mr Senior Developer decides to experiment using it The actual page presented to the user consists of five parts, which: Q Q Q Q Include the main site menu and a message box with the date and any messages relating to this customer View basic order status information Display the special offers Enable the user to select a pizza, to add to the order
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Q Show the current pizzas ordered
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The first part of the OrderForm j spJSP page looks like:
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<html> <head> <title>0rder</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-l"> </head> <body bgcolor="#FFFFFF"> <jsp:include page="menuhtml" <jsp:include page="Messagejsp" /> <jsp:scriptlet> Customer customer </jsp: sc ri ptl et > flush="true" /> flush="true"
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(Customer)sessiongetAttribute("customer");
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Using the j sp: include action, this portion of the page presents the main menu and a message that we'll discuss later The second part of the page is an information and action section It allows the user to view basic information on the order and act upon it by updating, deleting, or delivering it
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<h3>Place an order for customer <j sp:expression>customerc_first_name</j sp:expression> <j sp:expression>customerc_last_name</jsp:expression> <jsp:useBean id="order" class="jswc03OrderMaster" scope="session"> </j sp:useBean> (Order #: <jsp:getProperty name="order" property="or_number"/>): </h3> <form method="post" action="OrderMaintenanceS" name="forml"> <input type="hidden" name="od_number" value="<jsp:getProperty name="order" property="or_number"/>"> <p> <table width="100%" border="l" cellspacing="0" cellpadding="0"> <tr> <td>Date: <jsp:getProperty name="order" property="or_order_date"/> </td> <td>Status: <jsp:getProperty name="order" property="or_status"/> </td> <td> <input type="submit" name="command" value="Delete Order"> </td> </tr> <tr> <td>Delivery: Address: <input type="radio" name="Delivery" value="Address" <j sp:scriptlet> if (ordergetOr_delivery()equals("Address")) outprint( "checked"); </jsp:scriptlet> > Outlet: <input type="radio" name="Delivery" value="Outlet" <j sp:scriptlet>
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if (ordergetOr_delivery{)equals("Outlet")} outprintt "checked"); </jsp:scriptlet>>
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</td>
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<td>Remarks: etextarea name ="Remarks" rows="2"> <]sp:getProperty mune=" order property="oi-_remarkg'/> </textarea> </td> <td> <input type="submit" name="command" value="Update Order > </td> </tr* <tr> <td>0utlet: <input type="text" name="Dr_o_outlet_code" size="S' value="<jsp:getProperty name="order" property="or_o_cmtlet_codeV>" > </t<l>
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<td>Price: S<jsp:getProperty nanve="order" property="orj>rice"/x/td> <td><input type="submit" name="command" value="Deliver"> <input type="submit" name="command" value="View Fax" ><:/td> </tr> </table> <:/form>
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This section uses the jsp:useBean tag to obtain the attributes of the order from the OrderMaster bean It then is uses the j sp: getProperty action to access the attributes The result of these two first sections can be seen on the following screenshot:
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The JSP page continues by presenting the special offer of the day
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<h3>Specials:</h3> <jsp:include page="Specialsjsp" flush="true" />
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The code for Specials j sp is the following:
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int discount = 15; String pizzaName = ""; String pizzaSize = "" ; String pizzaDough = ""; boolean found = false; %> <% try { ClassforName("weblogicjdbcpoolDriver"); } catch(Exception e) { outprintln(e); } try { Connection conn = DriverManagergetConnection("jdbc:weblogic-pool:p2gPool"); String select = "select * from offer where of_from <= and of_to >= "; PreparedStatement pstmt = connprepareStatement(select); javasqlTimestamp now = new JavasqlTimestamp(SystemcurrentTimeMillis()); pstmtsetTimestamp(1, now); pstmtsetTimestamp(2, now); ResultSet resultSet = pstmtexecuteQuery(); if (resultSetnext()) { found = true; discount = resultSetgetlnt("of_discount"); pizzaName = resultSetgetstringf"of_p_name"); pizzaSize = resultSetgetString("of_p_size"); pizzaDough = resultSetgetString("of_od_dough"); } else found = false; resultSetclose() ;
pstmtclose() ;
import="Javautil*,Javasql*"%>
connclose(); } catch(Exception e) { Systemerrprintln(e); }
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<% if (found) {%> <form method="post" action="OrderMaintenanceS" name=""> <table width="100%" align="center"> <tr align ="cente r"> <td> <b>Special of the day:</b> Discount of <%=discount%>% on <%=pizzaName%> <%=pizzaSize%> <%=pizzaDough%>!!! <input type="hidden" name="Pizza" value="<%=pizzaName%>"> <input type="hidden" name="Size" value="<%=pizzaSize%>"> <input type="hidden" name="Dough" value="<%=pizzaDough%>"> <input type="hidden" name="Quantity" value="l"> <input type="submit" name="command" value="Add"> </td> </tr> </table> </form> <% } else {%> <center>No Specials Today</center> <%}%>
This JSP page will establish a connection to the database and query for the special offer that corresponds to the current day It then closes the connection and displays the information, giving the user the opportunity to add it to the order Returning to OrderForm j sp, the fourth section builds an input line from which a selection can be made and added to the order This is done with the following code:
<form method="post" action="OrderMaintenanceS" name="form2"> <input type="hidden" name="od_number" value="<j sp:getProperty name="order" property="or_number"/>"> <h3>Pizzas:</h3> <p> <b>Pizza</b>: <select name="Pizza"> <jsp:scriptlet> String pizzaName; int n = 0; Vector pizzaNames = (Vector)applicationgetAttribute("pizzaNames"); for (Enumeration pizzas = pizzaNameselements() ; pizzashasMoreElements() ;) { pizzaName = (String)pizzasnextElement(); outprint("<option value=\"" + pizzaName + " \ " " ) ; if (n == 0) outprint(" selected ");n++; outprint( " > " + pizzaName + "</option>"); </js p:s c ri ptl et> </select> Size: <select name="Size"> <option value="Small">Small</option> <option value="Medium" selected>Medium</option> <option value="Large">Large</option> </select> Dough: <select name="Dough">