REST_DAO_Layer

Creating DAO Layer
Create a UserDao Interface under springmvc_example.dao package and write the following code in it
package springmvc_example.dao;
import java.util.List;
import springmvc_example.model.User;
public interface UserDao {
public List getListUser();
public void saveOrUpdate(User user);
public void deleteUser(int id);
public User findUserById(int id);
}
Create a UserDaoImpl class implements UserDao Interface under springmvc_example.dao package and write the following code in it
package springmvc_example.dao;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import springmvc_example.model.User;
@Repository
public class UserDaoImpl implements UserDao {
@Autowired
private SessionFactory sessionFactory;
protected Session getSession(){
return sessionFactory.getCurrentSession();
}
@SuppressWarnings("unchecked")
public List getListUser() {
Criteria criteria = getSession().createCriteria(User.class);
return (List) criteria.list();
}
public void saveOrUpdate(User user) {
getSession().saveOrUpdate(user);
}
public void deleteUser(int id) {
User user = (User) getSession().get(User.class, id);
getSession().delete(user);
}
public User findUserById(int id) {
return (User) getSession().get(User.class, id);
}
}