how to make loginDAO and loginServlet?
userDAO =================== /* * To change this template, choose Tools | Templates * and open the template in the editor. */ package com.tcs.ignite.app.dao; import com.tcs.ignite.app.beans.User; import com.tcs.ignite.app.utils.ConnectionManager; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; /** * * @author 495944 */ public class UserDAO { public void logUserIn(User user) { try { Connection con = new ConnectionManager().createConnection(); String queryString = "select Username,password from register where Email='" + user.getEmail() + "'"; PreparedStatement ps = con.prepareStatement(queryString); ResultSet rs = ps.executeQuery(); if (rs.next()) { user.setRegistered(true); String password = rs.getString("password"); if (password.equals(user.getPassword())) { user.setName(rs.getString("Username")); } } else { user.setRegistered(false); } } catch (ClassNotFoundException ex) { ex.printStackTrace(); } catch (SQLException ex) { ex.printStackTrace(); } } public boolean forgetpassword(User user){ try { Connection con = new ConnectionManager().createConnection(); String queryString ="update test.register set password=("+"'"+user.getNewpassword()+"'"+") where Email=("+"'"+user.getEmail()+"'"+")"; System.out.println(queryString); PreparedStatement ps = con.prepareStatement(queryString); int rs = ps.executeUpdate(); if(rs==1){ return true; }else{ return false; } } catch (ClassNotFoundException ex) { ex.printStackTrace(); return false; } catch (SQLException ex) { ex.printStackTrace(); return false; } } }
Login servlet ======================= /* * To change this template, choose Tools | Templates * and open the template in the editor. */ package com.tcs.ignite.app.servlets; import com.tcs.ignite.app.beans.User; import com.tcs.ignite.app.dao.UserDAO; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * * @author 495944 */ @WebServlet(name = "Login1", urlPatterns = {"/Login1"}) public class Login1 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 { /* * TODO output your page here. You may use following sample code. */ out.println("<html>"); out.println("<head>"); out.println("<title>Servlet Login</title>"); out.println("</head>"); out.println("<body>"); out.println("<h1>Servlet Login at " + request.getContextPath() + "</h1>"); 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 { request.getSession().invalidate(); response.sendRedirect("home.jsp"); } /** * 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 { User user = new User(); user.setEmail(request.getParameter("inputEmail").trim()); user.setPassword(request.getParameter("inputPassword1").trim()); new UserDAO().logUserIn(user); if(user.isRegistered()){ if(user.getName()!=null){ request.getSession().setAttribute("user", user); request.getRequestDispatcher("home.jsp").forward(request, response); } else{ request.setAttribute("msg", "Wrong Password"); request.getRequestDispatcher("home.jsp").forward(request, response); // response.sendRedirect("index.jsp"); } }else{ request.setAttribute("msg", "User does not exist."); request.getRequestDispatcher("home.jsp").forward(request, response); // response.sendRedirect("index.jsp"); } } /** * Returns a short description of the servlet. * * @return a String containing servlet description */ @Override public String getServletInfo() { return "Short description"; }// </editor-fold> }
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