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Java Registration Form using Servlet MySQL MVC

This post explains Registration application in Java using Servlet, JSP, and MySQL database server. This Java registration form follows Model View Controller (MVC) architecture. Let us understand what is MVC and how this should be used while developing any application.

For Login application in java, refer to the post Login application in Java using MVC

The Model View Controller (MVC) architecture can be best explained with the help of the following diagram.

Model View Controller Architecture

We are making use of Eclipse Integrated development environment(IDE) for this Java Registration Application. To follow the basic coding standards, I have created my folder structure as shown in the following diagram.

The eclipse directory structure for the Java Registration application 

Suggested Read:

Any Registration or Login application always begins with views. It can be a page in HTML, JSP, PHP, VB or any other language. Our Java Registration application begins with Register.jsp and from Register.jsp we will call RegisterServlet.java class.

 

Register.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
 pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Register</title>
<script> 
function validate()
{ 
  var fullname = document.form.fullname.value;
  var email = document.form.email.value;
  var username = document.form.username.value; 
  var password = document.form.password.value;
  var conpassword= document.form.conpassword.value;
  
  if (fullname==null || fullname=="")
  { 
  alert("Full Name can't be blank"); 
  return false; 
  }
  else if (email==null || email=="")
  { 
  alert("Email can't be blank"); 
  return false; 
  }
  else if (username==null || username=="")
  { 
  alert("Username can't be blank"); 
  return false; 
  }
  else if(password.length<6)
  { 
  alert("Password must be at least 6 characters long."); 
  return false; 
  } 
  else if (password!=conpassword)
  { 
  alert("Confirm Password should match with the Password"); 
  return false; 
  } 
 } 
</script> 
</head>
<body>
<center><h2>Java Registration application using MVC and MySQL </h2></center>
 <form name="form" action="RegisterServlet" method="post" onsubmit="return validate()">
  <table align="center">
   <tr>
   <td>Full Name</td>
   <td><input type="text" name="fullname" /></td>
   </tr>
   <tr>
   <td>Email</td>
   <td><input type="text" name="email" /></td>
   </tr>
   <tr>
   <td>Username</td>
   <td><input type="text" name="username" /></td>
   </tr>
   <tr>
   <td>Password</td>
   <td><input type="password" name="password" /></td>
   </tr>
   <tr>
   <td>Confirm Password</td>
   <td><input type="password" name="conpassword" /></td>
   </tr>
   <tr>
   <td><%=(request.getAttribute("errMessage") == null) ? ""
   : request.getAttribute("errMessage")%></td>
   </tr>
   <tr>
   <td></td>
   <td><input type="submit" value="Register"></input><input
   type="reset" value="Reset"></input></td>
   </tr>
  </table>
 </form>
</body>
</html>
Registration Form

RegisterServlet.java

package com.mvc.controller;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.mvc.bean.RegisterBean;
import com.mvc.dao.RegisterDao;

public class RegisterServlet extends HttpServlet {
 
  public RegisterServlet() {
  }

  protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  //Copying all the input parameters in to local variables
   String fullName = request.getParameter("fullname");
   String email = request.getParameter("email");
   String userName = request.getParameter("username");
   String password = request.getParameter("password");
   
   RegisterBean registerBean = new RegisterBean();
  //Using Java Beans - An easiest way to play with group of related data
   registerBean.setFullName(fullName);
   registerBean.setEmail(email);
   registerBean.setUserName(userName);
   registerBean.setPassword(password); 
   
   RegisterDao registerDao = new RegisterDao();
   
  //The core Logic of the Registration application is present here. We are going to insert user data in to the database.
   String userRegistered = registerDao.registerUser(registerBean);
   
   if(userRegistered.equals("SUCCESS"))   //On success, you can display a message to user on Home page
   {
   request.getRequestDispatcher("/Home.jsp").forward(request, response);
   }
   else   //On Failure, display a meaningful message to the User.
   {
   request.setAttribute("errMessage", userRegistered);
   request.getRequestDispatcher("/Register.jsp").forward(request, response);
   }
  }
}

To summarize RegisterServlet.java flow :
1. Assign all the inputs(user details) to local variables.
2. Call RegisterBean.java to set all the user details using java setters.
3. Next, go to RegisterDao.java where you are just going to insert user details into the database.
4. Once it is successful, you are displaying a successful message.

RegisterDao.java

Data Access Object – It focuses on business logic with database connections and operations.
Here the RegisterDao.java code makes a connection with the Database layer and inserts user details into the database.

package com.mvc.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import com.mvc.bean.RegisterBean;
import com.mvc.util.DBConnection;

public class RegisterDao { 
  public String registerUser(RegisterBean registerBean)
  {
   String fullName = registerBean.getFullName();
   String email = registerBean.getEmail();
   String userName = registerBean.getUserName();
   String password = registerBean.getPassword();
   
   Connection con = null;
   PreparedStatement preparedStatement = null;   
   try
   {
    con = DBConnection.createConnection();
    String query = "insert into users(SlNo,fullName,Email,userName,password) values (NULL,?,?,?,?)"; //Insert user details into the table 'USERS'
    preparedStatement = con.prepareStatement(query); //Making use of prepared statements here to insert bunch of data
    preparedStatement.setString(1, fullName);
    preparedStatement.setString(2, email);
    preparedStatement.setString(3, userName);
    preparedStatement.setString(4, password);
    
    int i= preparedStatement.executeUpdate();
    
    if (i!=0)  //Just to ensure data has been inserted into the database
    return "SUCCESS"; 
   }
   catch(SQLException e)
   {
   e.printStackTrace();
   }   
   return "Oops.. Something went wrong there..!";  // On failure, send a message from here.
  }
}

MySQL script to create users table
The structure of users table

RegisterBean.java
JavaBeans are classes that encapsulate many objects into a single object (the bean). A JavaBean property is a named feature that can be accessed by the user of the object. Here the RegisterBean encapsulates registration properties fullName, email, userName, password. To set or access individual properties, set and get functions have been implemented.

package com.mvc.bean;

public class RegisterBean {

 private String fullName;
 private String email;
 private String userName;
 private String password;
 
 public String getUserName() {
 return userName;
 }
 public void setUserName(String userName) {
 this.userName = userName;
 }
 public String getPassword() {
 return password;
 }
 public void setPassword(String password) {
 this.password = password;
 }
 public void setFullName(String fullName) {
 this.fullName = fullName;
 }
 public String getFullName() {
 return fullName;
 }
 public void setEmail(String email) {
 this.email = email;
 }
 public String getEmail() {
 return email;
 }
}
DBConnection.java
We are making use of MySQL database server in this application. The URL format and driver name going to be different for different database servers.
package com.mvc.util;
 
import java.sql.Connection;
import java.sql.DriverManager;
 
public class DBConnection {
 public static Connection createConnection()
 {
     Connection con = null;
     String url = "jdbc:mysql://localhost:3306/customers"; //MySQL URL followed by the database name
     String username = "root"; //MySQL username
     String password = "root123"; //MySQL password
     System.out.println("In DBConnection.java class ");
      
     try
     {
         try
         {
            Class.forName("com.mysql.jdbc.Driver"); //loading MySQL drivers. This differs for database servers 
         } 
         catch (ClassNotFoundException e)
         {
            e.printStackTrace();
         }       
         con = DriverManager.getConnection(url, username, password); //attempting to connect to MySQL database
         System.out.println("Printing connection object "+con);
     } 
     catch (Exception e) 
     {
        e.printStackTrace();
     }   
     return con; 
 }
}

web.xml
The web.xml is known as deployment descriptor. It declares which Servlets exist and which URLs they handle. You need to mention fully qualified path for Servlet here.

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
 <display-name>RegistrationMVC</display-name>
 <welcome-file-list>
 <welcome-file>Register.jsp</welcome-file>
 </welcome-file-list>
 <servlet>
 <description></description>
 <display-name>RegisterServlet</display-name>
 <servlet-name>RegisterServlet</servlet-name>
 <servlet-class>com.mvc.controller.RegisterServlet</servlet-class>
 </servlet>
 <servlet-mapping>
 <servlet-name>RegisterServlet</servlet-name>
 <url-pattern>/RegisterServlet</url-pattern>
 </servlet-mapping>
</web-app>

Home.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
 pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Home Page</title>
</head>
<body>
 <center><h2>Home Page</h2></center>
 <b>User Registration Successful</b>
 <br></br>
 <b>Please <a href="https://krazytech.com/programs/a-login-application-in-java-using-model-view-controllermvc-design-pattern">log-in</a> to continue.</b>
  
</body>
</html>
Home Page

The code base can be downloaded from here.

Ravi Bandakkanavar

A Techie, Blogger, Web Designer, Programmer by passion who aspires to learn new Technologies every day. A founder of Krazytech. It's been 10+ years since I am publishing articles and enjoying every bit of it. I want to share the knowledge and build a great community with people like you.

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View Comments

  • Hi sir,

    Could you please tell me how to retrieve values from database.my requirement is after registering i have to fetch that data from database and i have show that details in edit page.where admin can edit details and update the profile.please help me out
    Thanks in advance sir.

  • Sir,
    could you please post code for uploading multiple files using jsp and servlet .iam following MVC pattern.my problem is i have one upload resume field in register page and one more extra documents field for uploading multiple files like passport etc..please help me out i'm struggling fro 2 days.

    • Hi Vikas,

      To upload multiple files using MVC would be difficult.
      I think you have to use different input/submit buttons to upload multiple documents. You should upload each one individually.

      • sir,
        my requirement is like resume upload in registration form.Admin can upload multiple documents in that field..could u send me any link related to that kind of requirement using jsp and servlet.

  • sir,
    could you please explain the servlet flow through pictorial way.iam a beginner could you please help me out.

    • Hi Vikas,

      I am here to help you.
      If you go through first image, it explains most of the RegisterServlet flow and also if you refer to my comments within servlet code you will understand the flow.

      Just to summarize the flow :
      1. Assign all the inputs(user details) to local variables
      2. Call Bean.java to set all the user details using java setters.
      3. Next, go to DAO.java where you are just going to insert user details into the database.
      4. Once it is successful, you are displaying successful message.

      Even Java Login page is also similar to this. You can learn it in the following post.
      http://krazytech.com/programs/a-login-application-in-java-using-model-view-controllermvc-design-pattern

      Let me know if you have further doubts.

  • i try to execute this code but i get "http 500 status error java.lang.NullPointerException " what i can do to solve this problem ... i hope to help me .. and thanks a lot

      • hi...even i'm getting problem in importing the files. i mean i'm getting errors in syntax.actually i'm doing my mini project for clg purpose on onlne music db.i'm getting problem in new registration so can you please help me with this??

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