Hibernate 4未排序

Question

我在一个实体中有一个SortedSet。但是当我尝试获取它时，它并不排序。我尝试使用hibernate或jpa，但都不起作用。有什么原因吗？(我的set实体也实现了可比)

    private SortedSet<News> news = new TreeSet<News>();

    public void setNews(SortedSet<News> news) {
    this.news = news;
}

    @OneToMany(fetch = FetchType.EAGER,  cascade = {CascadeType.PERSIST, CascadeType.MERGE })
    @JoinTable(name = "NEWSGROUP_NEWS", joinColumns = @JoinColumn(name = "NEWSGROUP_ID"), inverseJoinColumns = @JoinColumn(name = "NEWS_ID"))
    @OrderBy("title")
    @Sort(type=SortType.COMPARATOR, comparator=NewsComparator.class)
    public SortedSet<News> getNews() {
        return this.news;
    }

public static class NewsComparator implements Comparator<News>
    {

        @Override
        public int compare(News news1, News news2) {
            return news1.getTitle().compareTo(news2.getTitle());

        }

    }

我的刀

NewsGroup newsGroup = (NewsGroup)this.hibernateSessionFactory.getCurrentSession().get(NewsGroup.class, id);

我还打印了sql (启用了show_sql )，但它根本不显示order by。请给我建议。谢谢!

Answer 1

JMelnik是对的，通过删除@Sort，它起作用了