Hibernate对多个表进行关联查询实例

　　下面列举一个完整的例子来说明Hibernate对多个表进行关联查询：

　　String sTest = "from tBookInfo book, BookSelection sel where book.id = sel.bookId";

　　Collection result = new ArrayList();

　　Transaction tx = null;

　　try {

　　Session session = HibernateUtil.currentSession();

　　tx = session.beginTransaction();

　　Query query = session.createQuery(sql);

　　result = query.list();

　　tx.commit();

　　} catch (Exception e) {

　　throw e;

　　} finally {

　　HibernateUtil.closeSession();

　　}

　　ArrayList sList = (ArrayList) result;

　　Iterator iterator1 = sList.iterator();

　　while (iterator1.hasNext()) {

　　Object[] o = (Object[]) iterator1.next();

　　tBookInfo bookInfo = (tBookInfo) o[0];

　　BookSelection bookSelect = (BookSelection) o[1];

　　System.out.println("BookInfo-Title: " + bookInfo.getTitle());

　　System.out.println("BookSelection-BookSelectionId: " + bookSelect.getId());

　　}