Hey Folks! Are you looking for any help with Java MVC example, Java MVC architecture, or Pattern Help?
Are you facing some difficulties in understanding Java MVC? Well, we are sharing an insight about Java MVC, its architecture and its patterns in this article.
This tutorial is all about Java MVC and Java MVC example code and if you get stuck somewhere and need assistance in Java Assignment then you can hire the expert programmers at CodingZap.
So, lets jump to our topic.
What is Java MVC?
Java MVC stands for Model View and Controller. Java MVC is an architecture that programmers follow while programming Java applications.
MVC (Model-View-Controller) framework is a design pattern that separates an application’s user interface (UI), data, and control logic into three distinct components, each with a specific role.
Here’s a brief overview of each component:
- Model: This component represents the data and business logic of the application. It is responsible for managing the application’s state and enforcing business rules.
- View: View is responsible for rendering the user interface of the application. It takes data from the Model and presents it to the user like UI in a format they can interact with.
- Controller: Controller acts as mediator between the Model and View. It receives input from the user via the View, processes it, and updates the Model accordingly. It also updates the View with the results of Model changes.
By separating these concerns, MVC makes it easier to modify and maintain individual components without affecting others. This can lead to more flexible, scalable, and maintainable applications.
Why use Java MVC?
The answer is-
- Make the code more organized and standard.
- Avoid complexity.
- Enable easy debugging.
The main purpose of MVC is to ease down and reduce the complexity when it comes to building a large application that contains n number of modules.
Let me explain to you MVC architecture in Java with a diagram.
So the above diagram shows 3 different main components of MVC architecture. It’s a way we organize our code into different packages for every module of an application.
MVC architecture includes View, VO, BO, Controller, and DAO layers. The controller maintains the interconnectivity with the View, VO, BO, and DAO layers.
Let’s say for example we want to design a Login Page using Java MVC architecture.
How to achieve an MVC pattern in Java?
Now, here is the Login Page Java MVC example.
Imagine the Login Page as a small module of a large web application. Let’s divide the module(Login Page) into various layers.
First of all, starting with the View.
What is a View in MVC pattern?
The view is a layer that contains the front page in which the end-users see and interact.
Hence, the front-end part of the application is the View.
An example of a View is HTML or JSP which contains the content and various elements of the webpage.
Coming to the Back-end.
By providing the login credentials i.e the User Name and Password a user sends a response to the back-end.
Next what happens is that the Controller receives the login details from the View.
It is the task of the Controller to decide what to do with those details. For example where to send it and for what task.
The process goes like this, the first thing the Controller does is that it sends the details to the VO(value object) layer for modeling up of data into data objects after receiving it from the view.
Note: Few programmers refer to VO as the POJO class.
Then comes the BO layer.
The controller sends the value objects to the business layers for any kind of data manipulation.
All the required business logic is present in the BO layer.
In this example, the details need to be checked whether it is a valid credential or not i.e. the Username and Password.
Now we have the View, Model Object ready, and Business Objects ready.
So the next task for the BO is in this case, to match the data or check if it is present in the database or not. Finally, DAO(data object access) comes into the picture.
It contains all the database connections, the database driver registration, and the required DB queries which are needed for retrieving data from the database.
Note: Few programmers refer to DAO as the DTO.
Accordingly, the data comes back to the Controller and it again interacts with the view to show the output to the end-user on the screen.
In conclusion, the Controller keeps the process flow between various layers (View, VO, BO, and DAO). If you are studying Java course then you must be looking for Final Year Java Project ideas.
