Data access object (DAO) in Java

Question

Can anyone help me what is DAO(Data Access Object) in Java? How can I use it?

Answer 1

Basically, Data Access Object is an object or interface which helps you to provide access to an underlying database or storage. Given below is an example of DAO:

public class Employee {

    private int id;

    private String name;

    public int getId() {

        return id;

    }

    public void setId(int id) {

        this.id = id;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

}

interface EmployeeDAO {

    List<Employee> findAll();

    List<Employee> findById();

    List<Employee> findByName();

    boolean insertEmployee(Employee employee);

    boolean updateEmployee(Employee employee);

    boolean deleteEmployee(Employee employee);

}

I hope this will help.

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