In this tutorial how to create MVC\u00a0structure in Advance Java (J2EE) is shown.<\/p>\n
Code:<\/p>\n
index.jsp<\/p>\n
<%@page contentType=”text\/html” pageEncoding=”UTF-8″%>
\n<!DOCTYPE html>
\n<html>
\n<head>
\n<meta http-equiv=”Content-Type” content=”text\/html; charset=UTF-8″>
\n<title>Login Page<\/title>
\n<\/head>
\n<body>
\n<form action=”ControllerServlet” method=”POST”>
\nUsername: <input type=”text” name=”name”><br>
\nPassword: <input type=”password” name=”pwd”><br>
\n<input type=”submit” name=”Login”>
\n<\/form>
\n<\/body>
\n<\/html><\/p>\n
<\/p>\n
ControllerServlet.java<\/p>\n
package mvcdemo;<\/p>\n
import java.io.IOException;
\nimport java.io.PrintWriter;
\nimport javax.servlet.ServletException;
\nimport javax.servlet.http.HttpServlet;
\nimport javax.servlet.http.HttpServletRequest;
\nimport javax.servlet.http.HttpServletResponse;
\nimport javax.servlet.*;<\/p>\n
public class ControllerServlet extends HttpServlet {
\nprotected void doPost(HttpServletRequest req, HttpServletResponse res)
\nthrows ServletException, IOException {
\nres.setContentType(“text\/html;charset=UTF-8”);
\ntry (PrintWriter out = res.getWriter()) {
\nString name=req.getParameter(“name”);
\nString pwd=req.getParameter(“pwd”);<\/p>\n
LoginBean bean=new LoginBean();
\nbean.setName(name);
\nbean.setPassword(pwd);
\nreq.setAttribute(“bean”, bean);<\/p>\n
boolean status=bean.validate();<\/p>\n
if(status)
\n{
\nRequestDispatcher rd=req.getRequestDispatcher(“success.jsp”);
\nrd.forward(req,res);
\n}
\nelse
\n{
\nRequestDispatcher rd=req.getRequestDispatcher(“fail.jsp”);
\nrd.forward(req,res);
\n}
\n}
\n}<\/p>\n
}<\/p>\n
<\/p>\n
LoginBean.java<\/p>\n
package mvcdemo;<\/p>\n
public class LoginBean {<\/p>\n
private String name,pwd;<\/p>\n
public String getName(){
\nreturn name;}<\/p>\n
public String getPassword(){
\nreturn pwd;}<\/p>\n
public void setName(String name){
\nthis.name=name;}<\/p>\n
public void setPassword(String pwd){
\nthis.pwd=pwd;}<\/p>\n
public boolean validate()
\n{
\nLoginDB user=new LoginDB();
\nboolean success=user.ValidateUser(this);
\nreturn success;
\n}
\n}<\/p>\n
<\/p>\n
LoginDB.java<\/p>\n
package mvcdemo;
\nimport java.sql.*;<\/p>\n
public class LoginDB {<\/p>\n
static Connection conn=null;
\nstatic ResultSet rs=null;<\/p>\n
public boolean ValidateUser(LoginBean bean)
\n{
\nStatement stmt=null;<\/p>\n
String name=bean.getName();
\nString pwd=bean.getPassword();<\/p>\n
String qry=”select * from user where Username='”+name+”‘ AND Password='”+pwd+”‘;”;<\/p>\n
try{<\/p>\n
Class.forName(“net.ucanaccess.jdbc.UcanaccessDriver”);
\nString url=”jdbc:ucanaccess:\/\/D:\/Employee.accdb”;<\/p>\n
conn=DriverManager.getConnection(url);<\/p>\n
if(conn==null)
\n{
\nreturn false;
\n}<\/p>\n
stmt=conn.createStatement();
\nrs=stmt.executeQuery(qry);
\nboolean more=rs.next();<\/p>\n
if(!more)
\n{
\nreturn false;
\n}
\nelse
\n{
\nreturn true;
\n}
\n}
\ncatch(Exception e){}
\nreturn false;
\n}<\/p>\n
}<\/p>\n
<\/p>\n
success.jsp<\/p>\n
<%@page contentType=”text\/html” pageEncoding=”UTF-8″%>
\n<%@page import=”mvcdemo.LoginBean” %>
\n<!DOCTYPE html>
\n<html>
\n<head>
\n<meta http-equiv=”Content-Type” content=”text\/html; charset=UTF-8″>
\n<title>Success Page<\/title>
\n<\/head>
\n<body>
\n<p> You are successfully logged in!<\/p><br>
\n<%
\nLoginBean bean=(LoginBean)request.getAttribute(“bean”);
\nout.println(“Welcome, “+bean.getName());
\n%>
\n<\/body>
\n<\/html><\/p>\n
<\/p>\n
fail.jsp<\/p>\n
<%@page contentType=”text\/html” pageEncoding=”UTF-8″%>
\n<!DOCTYPE html>
\n<html>
\n<head>
\n<meta http-equiv=”Content-Type” content=”text\/html; charset=UTF-8″>
\n<title>Fail Page<\/title>
\n<\/head>
\n<body>
\n<p>Sorry! Username or Password Incorrect<\/p>
\n<%@include file=”index.jsp”%>
\n<\/body>
\n<\/html><\/p>\n
<\/p>\n