Question

public class SaveDataDTO {

    public static void main(String[] args) {

        // Film Objects
        FilmDTO fdto1 = SpringGetBean.getFilmDTOBean();
        fdto1.setfName("Avengers");

        FilmDTO fdto2 = SpringGetBean.getFilmDTOBean();
        fdto2.setfName("Exodus Gods And Kings");

        FilmDTO fdto3 = SpringGetBean.getFilmDTOBean();
        fdto3.setfName("Fast And The Furious 7");

        // Genre Objects
        GenreDTO gdto1 = SpringGetBean.getGenreDTOBan();
        gdto1.setgName("Action");

        GenreDTO gdto2 = SpringGetBean.getGenreDTOBan();
        gdto2.setgName("Science Fiction");

        GenreDTO gdto3 = SpringGetBean.getGenreDTOBan();
        gdto3.setgName("Fiction");

        // Adding The Films To List
        List<FilmDTO> flaef = new ArrayList<FilmDTO>();
        flaef.add(fdto2);

        List<FilmDTO> flae = new ArrayList<FilmDTO>();
        flae.add(fdto1);

        List<FilmDTO> flf = new ArrayList<FilmDTO>();
        flf.add(fdto3);

        // Adding The Genre To List
        List<GenreDTO> glasf = new ArrayList<GenreDTO>();
        glasf.add(gdto1);
        glasf.add(gdto2);
        glasf.add(gdto3);

        List<GenreDTO> glas = new ArrayList<GenreDTO>();
        glas.add(gdto1);
        glas.add(gdto2);

        List<GenreDTO> glf = new ArrayList<GenreDTO>();
        glf.add(gdto3);

        // Association Of Objects In Both Directions
        fdto1.setGenres(glas);
        fdto2.setGenres(glasf);
        fdto3.setGenres(glf);

        gdto1.setFilms(flae);
        gdto2.setFilms(flae);
        gdto3.setFilms(flf);

        // Hibernate Methods
        Session session = MyHibernateSession.getSession();
        Transaction tx = session.beginTransaction();

        try {
            session.save(fdto1);
            session.save(fdto2);
            session.save(fdto3);
            tx.commit();
        } catch (HibernateException e) {
            e.printStackTrace();
        } finally {
            session.close();
        }

    }

}

这工作正常，但如何动态地制作物品，实际上每件事都在这里编码，我也希望根据用户选择映射事物。所以如果任何人都可以帮助我在这个代码

Answer 1

我为你重构了代码：）

public static void main(String[] args) {

    FilmDTO fdto1 = SpringGetBean.getFilmDTOBean();
    fdto1 .setGenres(addGenre("Action", "Science Fiction"));

    FilmDTO fdto2 = SpringGetBean.getFilmDTOBean();
    fdto2.setGenres(addGenre("Action", "Science Fiction", "Fiction"));

    FilmDTO fdto3 = SpringGetBean.getFilmDTOBean();
    fdto3.setGenres(addGenre("Fiction"));

    GenreDTO gdto1 = SpringGetBean.getGenreDTOBan();
    gdto1.setFilms(addFilm("Avengers"));

    GenreDTO gdto2 = SpringGetBean.getGenreDTOBan();
    gdto2.setFilms(addFilm("Exodus Gods And Kings"));

    GenreDTO gdto3 = SpringGetBean.getGenreDTOBan();
    gdto3.setFilms(addFilm("Fast And The Furious 7"));

    // Hibernate Methods
    Session session = MyHibernateSession.getSession();
    Transaction tx = session.beginTransaction();

    try {
        session.save(fdto1);
        session.save(fdto2);
        session.save(fdto3);
        tx.commit();
    } catch (HibernateException e) {
        e.printStackTrace();
    } finally {
        session.close();
    }
}

private static List<GenreDTO> addGenre(String... genre) {
    List<GenreDTO> list = new ArrayList<GenreDTO>();
    for (String gn : genre) {
        GenreDTO g = SpringGetBean.getGenreDTOBan();
        g.setgName(gn);
        list.add(g);
    }
    return list;
}

private static List<FilmDTO> addFilm(String film) {
    List<FilmDTO> filmList = new ArrayList<FilmDTO>();
    FilmDTO f = SpringGetBean.getFilmDTOBean();
    f.setfName(film);
    return filmList;

}

当然我们可以进一步重构这一点，但这看起来更接近你的逻辑。现在用户只需指定电影名称或其类型，您可以将它们传递到您的代码中以使其动态

<强>更新

你可以进一步制作这样的动态电影对象，在这里你只需要传递电影名称列表

 List<String> films = Arrays.asList("Avengers", "Exodus Gods And Kings", "Fast And The Furious 7");

    // Hibernate Methods
    Session session = MyHibernateSession.getSession();
    Transaction tx = session.beginTransaction();

    try {
        for (String film : films) {
              GenreDTO g = SpringGetBean.getGenreDTOBan();
              g.setFilms(addFilm(film));
              session.save(g);
        }
    } catch (HibernateException e) {
        e.printStackTrace();
    } finally {
        session.close();
    }

如何使对象创建动态，根据用户选择意味着

1 个答案: