hibernate ppt

/** * */ package example.test; import java.util.Date; import java.util.HashSet; import org.hibernate.Hibernate; import org.hibernate.HibernateException; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.hibernate.cfg.Configuration; import example.customer.Customer; import example.jihemapping.Book; /** * @author phj * @time 10:53:37 AM * @date Jun 2, 2008 * @verison 1.0 * */ public class TestSet { private static SessionFactory factory ; static { Configuration cfg = new Configuration(); cfg.configure(); factory = cfg.buildSessionFactory(); } public void testSave() { Session session = factory.openSession() ; Book book =new Book() ; book.setBookName("j2ee") ; // book.setTopics(new HashSet()) ; book.addTopic("java") ; book.addTopic("O/R Mapping") ; Transaction tx = null ; try { tx = session.beginTransaction() ; System.out.println(book); session.save(book) ; System.out.println(book.toString()) ; // System.out.println(customer.getId()) ; // System.out.println(customer.getName()) ; // System.out.println(customer.getBirthday()) ; tx.commit() ; }catch(HibernateException ex) { ex.printStackTrace() ; if(tx!=null) { tx.rollback() ; } }finally { session.close() ; } } public void testLoad() { Session session = factory.openSession() ; Transaction tx = null ; try { tx = session.beginTransaction() ; // Book book = (Book)session.load(Book.class, new Long(3)); Book book = (Book)session.get(Book.class, new Long(8)); // System.out.println(book) ; // book.setName("zhangsan") ; // book.setBookName("j2ee") ; // book.addTopic("java") ; // book.addTopic("O/R Mapping") ; //强制加载关联的集合数据 // Hibernate.initialize(book.getTopics()) ; // System.out.println(book.getTopics()) ; // book.getTopics().clear(); // book.getTopics().remove("O/R Mapping") ; tx.commit() ; session.close() ; System.out.println(book.getTopics()) ; }catch(HibernateException ex) { ex.printStackTrace() ; if(tx!=null) { tx.rollback() ; } } } public void testUpdate() { Session session = factory.openSession() ; Session session1 = factory.openSession() ; Transaction tx = null ; Transaction tx1 = null ; try { tx = session.beginTransaction() ; Book book = (Book)session.load(Book.class, new Long(7)); // Book book = (Book)session.get(Book.class, new Long(7)); System.out.println(book.getTopics()) ; // session.clear() ; session.close() ; // System.out.println(book.getTopics()) ; Book book1 =new Book() ; tx1 = session1.beginTransaction() ; book1.setId(new Long(7)) ; book1.setBookName("java") ; book1.addTopic("java") ; book1.addTopic("j2se") ; // session1.clear() ; session1.update(book1); // session1.clear() ; System.out.println(book1.getBookName()) ; tx1.commit() ; session1.close() ; }catch(HibernateException ex) { ex.printStackTrace() ; if(tx!=null) { tx.rollback() ; } } } /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub TestSet testSet = new TestSet() ; // testSet.testSave() ; testSet.testLoad() ; // testSet.testUpdate() ; } }