The directory structure of the web application would be like this:
index.jsp
login.java
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
@WebServlet(name="login", urlPatterns={"/login"})
public class login extends HttpServlet {
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
try {
String name= request.getParameter("text1");
String pass= request.getParameter("text2");
if(name.equalsIgnoreCase(pass))
{
response.addCookie(new Cookie("name",name));
out.println("<h1>Welcome "+name+"</h1><br>");
String s="Click here to move to next page";
out.println("<a href='http://localhost:8080/withTheHelpOfCookies/newjsp.jsp'>"+s+"</a>");
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet login</title>");
out.println("</head>");
out.println("<body>");
out.println("<form name=\"form2\" method=\"post\" action=\"addItems\">");
out.println("Laptop <input type=\"checkbox\" name=\"check1\" value=\"Laptop\"/><br>");
out.println("Mobile <input type=\"checkbox\" name=\"check2\" value=\"Mobile \"/><br>");
out.println("Tablet <input type=\"checkbox\" name=\"check3\" value=\"Tablet \"/><br>");
out.println("Playstation <input type=\"checkbox\" name=\"check4\" value=\"Playstation\"/><br>");
out.println("<input type=\"submit\" name=\"submit1\" /><br>");
out.println("</form>");
out.println("</body>");
out.println("</html>");
}
} finally {
out.close();
}
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/**
* Handles the HTTP <code>GET</code> method.
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Handles the HTTP <code>POST</code> method.
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Returns a short description of the servlet.
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}
addItem.java
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
*
* @author Sunshine
*/
@WebServlet(name = "addItems", urlPatterns = {"/addItems"})
public class addItems extends HttpServlet {
/**
* Processes requests for both HTTP
* <code>GET</code> and
* <code>POST</code> methods.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
try {
String s1= request.getParameter("check1");
String s2= request.getParameter("check2");
String s3= request.getParameter("check3");
String s4= request.getParameter("check4");
Cookie c[]= request.getCookies();
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet additems</title>");
out.println("</head>");
out.println("<body>");
out.println("Show my Cart");
out.println("<form name=\"form2\" method=\"post\" action=\"cart\">"
+ "<input type=\"submit\" name=\"Show Cart\"></form>");
out.println("</body>");
out.println("</html>");
response.addCookie(new Cookie("one",s1));
response.addCookie(new Cookie("two",s2));
response.addCookie(new Cookie("three",s3));
response.addCookie(new Cookie("four",s4));
} finally {
out.close();
}
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/**
* Handles the HTTP
* <code>GET</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Handles the HTTP
* <code>POST</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Returns a short description of the servlet.
*
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}
Cart.java
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet(name="cart", urlPatterns={"/cart"})
public class cart extends HttpServlet {
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
try {
Cookie c[]=request.getCookies();
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet cart</title>");
out.println("</head>");
out.println("<body>");
out.println("<p> Current user is : "+c[1].getValue().toString()+"</p>");
out.println("<hr align=center size=5 width=100%>");
out.println("<h2> </h2>");
for(int i=2,j=1; i<6; i++,j++)
{ out.println(c[i].getValue());
out.println("");
}
out.println("</body>");
out.println("</html>");
} finally {
out.close();
}
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/**
* Handles the HTTP <code>GET</code> method.
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Handles the HTTP <code>POST</code> method.
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Returns a short description of the servlet.
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}
