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:
- Create (C):
- Keyword:
INSERT,CREATE - Title: Create a new record or entry in the database.
- Keyword:
- Read (R):
- Keyword:
SELECT,READ - Title: Retrieve or fetch data from the database.
- Keyword:
- Update (U):
- Keyword:
UPDATE - Title: Update or modify an existing record in the database.
- Keyword:
- Delete (D):
- Keyword:
DELETE,REMOVE - Title: Delete or remove a record from the database.
- Keyword:
MVC components involved in performing CRUD operations:
- 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).
- View:
- Represents the user interface.
- Displays data from the model to the user and sends user input to the controller.
- Keywords:
View,User Interface.
- 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.