Java基础－－用泛型设计DAO

举个很简单的例子：

public interface BaseDao<T> {
    public void create (T t);
    public void delete (T t);
    public void update (T t);
}

public interface UserDao extends BaseDao<User> {
    public void other (User user);
}


public interface RoleDao extends BaseDao<Role> {
    public void other (Role role);
}