Skip to main content

JAVA BEAN CLASS, What is MVC Design Pattern in Java



It is the serializable class of Java that is used to contain data in object patterns, using we can send data easily from one platform to another using a secure way.
it is used to provide MVC Design patterns to Java Program Code.
MVC means MODEL, VIEW, and Controller.
MODEL means Database Layer which is used to perform a database operation, JAVA Bean class will work in Database Layer.
View:-  It is used to design a web page using JSP, it is also called User Access Layer
Controller:- it will work as an intermediate between Model and Views. we will write program code or program logic also in Controller. Servlet Class will be used to Create a Controller.
The flow of MVC:-
In MVC Design Pattern First Controller will be called after that View and Model Layer Will be Loaded into An Application.
1)   Controller  ------->  2) View  ---------->  3) Model
Step for MVC:-
1) Create a JSP page  to design view
2)  Create Servlet  to design a controller
3)  Create JAVA Beans Class Define Property to create a model
Property is used to contain data of data members using getter and setter blocks.
JAVA BEAN CLASS is also Called POJO CLASS in Hibernate
POJO means  PLAIN OLD JAVA OBJECTS
1) Code of JSP Web Page or View:-
<%@ 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>Insert title here</title>
</head>
<body>
<h1>Staff Registration Form</h1>
<form action="../StaffSerNew" method="post">
<input type="text" name="txtsid" placeholder="Enter staff ID" />
<br><br>
<input type="text" name="txtpass" placeholder="Enter password" />
<br><br>
<input type="text" name="txtfname" placeholder="Enter fullname" />
<br><br>
<input type="text" name="txtrole" placeholder="Enter role" />
<br><br>
<input type="submit" name="btnsubmit" value="Click" />
</form>
<a href="stafflogin.jsp">Login Here</a>
</body>
</html>
2) Code of Controller Class or Servlet:-
package controller;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
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 model.Staff;;
/**
 * Servlet implementation class StaffSer
 */
@WebServlet(name = "StaffSerNew", urlPatterns = { "/StaffSerNew" })
public class StaffSer extends HttpServlet {
private static final long serialVersionUID = 1L;
   
    /**
     * @see HttpServlet#HttpServlet()
     */
    public StaffSer() {
        super();
        // TODO Auto-generated constructor stub
    }
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
response.getWriter().append("Served at: ").append(request.getContextPath());
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
try
{
Staff obj = new Staff();
obj.setStaffid(request.getParameter("txtsid"));
obj.setPassword(request.getParameter("txtpass"));
obj.setFullname(request.getParameter("txtfname"));
obj.setRole(request.getParameter("txtrole"));
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/crm","root","");
Statement st = conn.createStatement();
int res = st.executeUpdate("insert into staff(staffid,password,fullname,role) values('"+obj.getStaffid()+"','"+obj.getPassword()+"','"+obj.getFullname()+"','"+obj.getRole()+"')");
if(res!=0)
{
out.print("Data Submitted Successfully");
}
}
catch(Exception ex)
{
out.print(ex.getMessage());
}
}
}
3) Code of Model Class or Bean Class:-
package model;
public class Staff {
private String staffid;
private String password;
private String fullname;
private String role;
public String getStaffid() {
return staffid;
}
public void setStaffid(String staffid) {
this.staffid = staffid;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getFullname() {
return fullname;
}
public void setFullname(String fullname) {
this.fullname = fullname;
}
public String getRole() {
return role;
}
public void setRole(String role) {
this.role = role;
}
}

Labels:

Comments

Post a Comment

POST Answer of Questions and ASK to Doubt

Popular posts from this blog

Uncontrolled form input in React-JS

  Uncontrolled form input in React-JS? If we want to take input from users without any separate event handling then we can uncontrolled the data binding technique. The uncontrolled input is similar to the traditional HTML form inputs. The DOM itself handles the form data. Here, the HTML elements maintain their own state that will be updated when the input value changes. To write an uncontrolled component, you need to use a ref to get form values from the DOM. In other words, there is no need to write an event handler for every state update. You can use a ref to access the input field value of the form from the DOM. Example of Uncontrolled Form Input:- import React from "react" ; export class Info extends React . Component {     constructor ( props )     {         super ( props );         this . fun = this . fun . bind ( this ); //event method binding         this . input = React . createRef ();...
Post a Comment
Read more

JSP Page design using Internal CSS

  JSP is used to design the user interface of an application, CSS is used to provide set of properties. Jsp provide proper page template to create user interface of dynamic web application. We can write CSS using three different ways 1)  inline CSS:-   we will write CSS tag under HTML elements <div style="width:200px; height:100px; background-color:green;"></div> 2)  Internal CSS:-  we will write CSS under <style> block. <style type="text/css"> #abc { width:200px;  height:100px;  background-color:green; } </style> <div id="abc"></div> 3) External CSS:-  we will write CSS to create a separate file and link it into HTML Web pages. create a separate file and named it style.css #abc { width:200px;  height:100px;  background-color:green; } go into Jsp page and link style.css <link href="style.css"  type="text/css" rel="stylesheet"   /> <div id="abc"> </div> Exam...
Post a Comment
Read more

JDBC using JSP and Servlet

JDBC means Java Database Connectivity ,It is intermediates from Application to database. JDBC has different type of divers and provides to communicate from database server. JDBC contain four different type of approach to communicate with Database Type 1:- JDBC-ODBC Driver Type2:- JDBC Vendor specific Type3 :- JDBC Network Specific Type4:- JDBC Client-Server based Driver  or JAVA thin driver:- Mostly we prefer Type 4 type of Driver to communicate with database server. Step for JDBC:- 1  Create Database using MYSQL ,ORACLE ,MS-SQL or any other database 2   Create Table using database server 3   Create Form according to database table 4  Submit Form and get form data into servlet 5  write JDBC Code:-     5.1)   import package    import java.sql.*     5.2)  Add JDBC Driver according to database ide tools     5.3)  call driver in program         ...
4 comments
Read more