Advanced Java: Shopping Cart & Authentication Filter

Name : Lathiya Dhruvil Subject : Advanced Java Date:1 / 5 Enrollment no. : 200420107103 Subject code : 3160707 Practical - 7 1. Implement the shopping cart for users for the online shopping. Apply the concept of session. Program/Solution : shoppingCart.jsp : %@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"% !DOCTYPE html html head meta charset="ISO-8859-1" titleShopping Cart /title /head body h1Shopping Cart /h1 h2Select Product From list /h2 form action="CheckoutServlet" method="post" table thead tr thProductID /th thTitle /th thPrice /th thQuantity /th /tr /thead tbody % int[] productId = {0,1,2,3}; String[] title = {"Oppo", "Vivo", "Realme", "Samsung"}; int[] price = {15000, 20000, 12000, 40000}; for(int i=0;i =3;i++){ out.print(" tr td"+ productId[i] +" /td td"+ title[i] +" /td td"+ price[i] +" /td td input type='number' name='Product" + productId[i] +"' /td /tr"); } % /tbody /table input type="submit" value="Add To Cart" /form /body /html CheckoutServlet.java : import java.io.IOException; 1 Name : Lathiya Dhruvil Subject : Advanced Java Date:1 / 5 Enrollment no. : 200420107103 Subject code : 3160707 import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; @WebServlet("/CheckoutServlet") public class CheckoutServlet extends HttpServlet { private static final long serialVersionUID = 1L; public CheckoutServlet() { super(); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.getWriter().append("Served at: ").append(request.getContextPath()); HttpSession session = request.getSession(); int[] productId = {1,2,3,4}; String[] title = {"Oppo", "Vivo", "Realme", "Samsung"}; int[] price = {15000, 20000, 12000, 40000}; int[] quantity = new int[4]; int total =0; for(int i=0;i =3;i++){ quantity[i] = Integer.valueOf(request.getParameter("Product"+i)); total = total + (quantity[i] + price[i]); } session.setAttribute("quantity",quantity); session.setAttribute("price", price); session.setAttribute("title", title); session.setAttribute("productId", productId); session.setAttribute("Total", total); response.sendRedirect("checkout.jsp"); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } } checkout.jsp : %@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"% !DOCTYPE html html head meta charset="ISO-8859-1" titleWelcome /title /head body h2Welcome to Checkout Page /h2 hr h3Product Summary /h3 hr table 2 Name : Lathiya Dhruvil Subject : Advanced Java Date:1 / 5 Enrollment no. : 200420107103 Subject code : 3160707 tr thItem Name /th th Price /th thQuantity /th /tr % int quantity[] = (int[])session.getAttribute("quantity"); String title[] = (String[])session.getAttribute("title"); int price[] = (int[])session.getAttribute("price"); for(int i=0;i =3;i++){ out.write(" tr"); out.write(" td"+title[i]+ " /td"); out.write(" td" + price[i] + " /td"); out.write(" td"+ quantity[i] + " /td"); out.write(" /tr"); } % /table hr h2Total Amount %= session.getAttribute("Total") % /h2 /body /html Output : 3 Name : Lathiya Dhruvil Subject : Advanced Java Date:1 / 5 Enrollment no. : 200420107103 Subject code : 3160707 2. Implement Authentication filter using filter API. Program/Solution : Login Page (Login. html) : !DOCTYPE html html head meta charset="ISO-8859-1" titleLogin Form /title /head body h2Login Page /h2 form action="welcome.jsp" method="post" labelUser Name : /label input type="text" name="username" br labelPassword : /label input type="password" name="pass" br input type="submit" value=" Login" /form /body /html Filter (Login Filter. java) : import java.io.*; import java.sql.*; import javax.servlet.*; import javax.servlet.annotation.WebFilter; @WebFilter("/welcome.jsp") public class LoginFilter implements Filter { public LoginFilter() { // TODO Auto-generated constructor stub } public void destroy() { // TODO Auto-generated method stub } public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { PrintWriter out = response.getWriter(); String uname = request.getParameter("username").toLowerCase(); String pass = request.getParameter("pass").toLowerCase(); try { Class.forName("com.mysql.jdbc.Driver"); Connection con = DriverManager.getConnection("jdbc:mysql://localhost/student_data","root",""); Statement st = con.createStatement(); 4 Name : Lathiya Dhruvil Subject : Advanced Java Date:1 / 5 Enrollment no. : 200420107103 Subject code : 3160707 String query = "select * from studentTable where firstname='"+uname+"' and password='"+pass+"'"; ResultSet rs = st.executeQuery(query); if(rs.next()) { String data = rs.getString("firstname"); System.out.println(data); request.setAttribute("user", data); chain.doFilter(request, response); } else { RequestDispatcher dis = request.getRequestDispatcher("tryAgain.html"); dis.forward(request, response); } } catch(Exception e) { out.println("Connectivity Error"); e.printStackTrace(); } } public void init(FilterConfig fConfig) throws ServletException { // TODO Auto-generated method stub } } Welcome Page (welcome.jsp) : %@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"% !DOCTYPE html html head meta charset="ISO-8859-1" titleWelcome /title /head body h2Welcome, %= request.getAttribute("user") % /h2 /body /html try again Page (tryAgain.html) : !DOCTYPE html html head meta charset="ISO-8859-1" titleInvalid Login /title /head body h1User Id or password Incorrect /h1 h3Try Again /h3 a href="login. html" Login Page /a /body /html 5 Name : Lathiya Dhruvil Subject : Advanced Java Date:1 / 5 Enrollment no. : 200420107103 Subject code : 3160707 Output : 6