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我在实体中有一个 SortedSet。但是当我尝试获取它时,它并没有排序。我尝试使用hibernate或jpa,都不起作用。任何原因?(我的设置实体也实现了可比性)

    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());

        }

    }

我的道

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

我还打印了 sql(打开了 show_sql),但它根本没有显示 order by。请指教。谢谢!

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1 回答 1

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JMelnik 是对的,通过删除@Sort,它起作用了

于 2012-07-19T19:09:07.380 回答