How do I implement a Data Access Object (DAO)?

Can you explain what a Data Access Object is?

A Data Access Object (DAO) is a design pattern that provides an abstract interface to a database. It allows for separation of concerns, making it easier to manage data access.

How do I implement a DAO in my project?

To implement a DAO, you typically create an interface that defines the methods for data operations, then create a concrete class that implements this interface, handling the actual database interactions.

What are the benefits of using a DAO?

Using a DAO helps in maintaining cleaner code, promotes reusability, and makes it easier to switch between different data sources without affecting the rest of your application.

Can you give me a simple code example?

Sure! Here's a basic example in Java:

public interface UserDao {
    void addUser(User user);
    User getUser(int id);
}

public class UserDaoImpl implements UserDao {
    // Database connection and implementation details here
}