Java

Member 12540619 wrote:

Do you have websites or links to suggest for me?

Member 12061600 wrote:

is it say more difficult

public interface UserLister {
    List<User> getUsers();
}

public class UserListerDB implements UserLister {
    public List<User> getUsers() {
        // DB access code here
    }
}

public class SomeView {
    private UserLister userLister;

    public void render() {
        List<User> users = userLister.getUsers();
        view.render(users);
    }
}

<bean id="userLister" class="UserListerDB" />

<bean class="SomeView">
    <property name="userLister" ref="userLister" />
</bean>