第九讲关联映射之基于外键单向一对一

1、第九讲 关联映射之基于外键单向一对一人与身份证的关系（一对一）User.javapublic class User private int id;private String name;private int age;private IdCard idCard;public User() public User(String name, int age) super(); = name;this.age = age;/省略get/setIdCard.javapublic class IdCard private String id;private String address;public I

2、dCard() public IdCard(String address) super();this.address = address;/省略get/set2、在数据库表的关系t_usert_idcardidnameagecardIdidaddress1张三23321023123123123321023123123123北京2李四22654352345243523654352345243523天津映射文件User.hbm.xmlIdCard.hbm.xml测试public class HibernateTest Testpublic void testCreateDB()Configurat

3、ion cfg = new Configuration().configure();SchemaExport se = new SchemaExport(cfg);/第一个参数 是否打印脚本，第二个参数是否导入数据库se.create(true, true);Test public void testInit()Session session = null;trysession = HibernateUtil.getSession();session.beginTransaction();IdCard idCard = new IdCard();idCard.setId(32102312312

4、3123);idCard.setAddress(北京);IdCard idCard1 = new IdCard();idCard1.setId(654352345243523);idCard1.setAddress(天津);User u1 = new User(张三,23);u1.setIdCard(idCard);User u2 = new User(李四,22);u2.setIdCard(idCard1);session.save(idCard);session.save(idCard1);session.save(u1);session.save(u2);session.getTrans

5、action().commit();catch(Exception e)e.printStackTrace();session.getTransaction().rollback();finallyif(session!=null)session.close();Testpublic void testGet()Session session = null;trysession = HibernateUtil.getSession();session.beginTransaction();User user = (User)session.get(User.class, 1);System.out.println(姓名：+user.getName()+ 身份证：+user.getIdCard().getId();session.getTransaction().commit();catch(Exception e)e.printStac