Slip4_first.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<form action="Slip4_Second.jsp" method="post">
<h1>Shopping Mall</h1>
Rice :
<select name="rice">
<option value="2">2 Kg</option>
<option value="5">5 Kg</option>
<option value="10">10 Kg</option>
<option value="15">15 Kg</option>
</select>
Wheat :
<select name="wheat">
<option value="2">2 Kg</option>
<option value="5">5 Kg</option>
<option value="10">10 Kg</option>
<option value="15">15 Kg</option>
</select>
<input type="submit" value="Submit">
</form>
</body>
</html>
Slip4_Second.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<%
String rice = request.getParameter("rice");
int r = Integer.parseInt(rice);
String wheat = request.getParameter("wheat");
int w = Integer.parseInt(wheat);
int tr = r * 40;
int wt = w * 60;
int pt = tr + wt;
session.setAttribute("first_Total", pt);
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page
</head>
<body>
<h1>Shopping Mall
<form action="Slip4_Third.jsp" method="post">
Maggi :
<select name="maggi">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
</select>
Good Day :
<select name="good">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
</select>
<input type="submit" value="Submit">
</form>
</body>
</html>
Slip4_Third.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<%
String m = request.getParameter("maggi");
String g = request.getParameter("good");
int mp = Integer.parseInt(m);
int gp = Integer.parseInt(g);
int mpt = mp * 10;
int gpt = gp * 10;
int secont_total = mpt + gpt;
int first_Total = (Integer)request.getSession().getAttribute("first_Total");
int grand_Total = first_Total + secont_total;
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page
</head>
<body>
<h1>Shopping Mall
<h1>First Page Total <%=first_Total%>
<h1>Second Page Total <%=secont_total%>
<h1>Total Bill<%=grand_Total%>
</body>
</html>