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Queryiest
QueryiestEnlightened
Asked: July 25, 20232023-07-25T00:26:46-05:00 2023-07-25T00:26:46-05:00In: Programs

Perform CRUD operation in java using mvc pattern.

In Java, performing CRUD (Create, Read, Update, Delete) operations in an MVC (Model-View-Controller) architecture typically involves creating separate components for each operation. Below are the keywords and titles associated with each operation:

  1. Create (C):
    • Keyword: INSERT, CREATE
    • Title: Create a new record or entry in the database.
  2. Read (R):
    • Keyword: SELECT, READ
    • Title: Retrieve or fetch data from the database.
  3. Update (U):
    • Keyword: UPDATE
    • Title: Update or modify an existing record in the database.
  4. Delete (D):
    • Keyword: DELETE, REMOVE
    • Title: Delete or remove a record from the database.

MVC components involved in performing CRUD operations:

  1. Model:
    • Responsible for representing the data and business logic.
    • It includes the data access layer to interact with the database.
    • Keywords: Model, Data Access Layer, DAO (Data Access Object).
  2. View:
    • Represents the user interface.
    • Displays data from the model to the user and sends user input to the controller.
    • Keywords: View, User Interface.
  3. Controller:
    • Acts as an intermediary between the model and the view.
    • Receives user input from the view and processes it, making calls to the model to perform CRUD operations.
    • Keywords: Controller, Request Handling.

Here’s a brief outline of how you might structure the code for CRUD operations in Java with an MVC architecture:

1. Model (Data Access Layer):

public class YourModel {
// Data access methods for CRUD operations
public void create(Object data) {
// Implementation for creating a new record
}

public Object read(Object primaryKey) {
// Implementation for retrieving data based on primary key
return null;
}

public void update(Object data) {
// Implementation for updating an existing record
}

public void delete(Object primaryKey) {
// Implementation for deleting a record based on primary key
}
}

2. View (User Interface):

public class YourView {
// Display methods to show data and get user input
public void displayData(Object data) {
// Implementation to display data to the user
}

public Object getUserInput() {
// Implementation to get user input and return it
return null;
}
}

3. Controller (Request Handling):

public class YourController {
private YourModel model;
private YourView view;

public YourController(YourModel model, YourView view) {
this.model = model;
this.view = view;
}

public void createRecord() {
Object userInput = view.getUserInput();
model.create(userInput);
}

public void readRecord(Object primaryKey) {
Object data = model.read(primaryKey);
view.displayData(data);
}

public void updateRecord() {
Object userInput = view.getUserInput();
model.update(userInput);
}

public void deleteRecord(Object primaryKey) {
model.delete(primaryKey);
}
}

Note: This is a simplified outline to illustrate the basic structure of a Java MVC application for CRUD operations. In a real-world application, you would need to consider error handling, database connections, data validation, and other important aspects for a robust and secure system.

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