hibernate映射之主键单向一对一
数据模型
userinfo表
login表
对象模型
UserInfo private int uid; private String uname; private boolean usex;
Login private int lid; private String lname; private String lpassword; private UserInfo userinfo;
配置对应关系
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="com.skyedu.bean"> <class name="UserInfo" table="userinfo"> <id name="uid" column="uid" > <generator class="native"></generator> </id> <property name="uname" column="uname" length="32"></property> <property name="usex" column="usex" ></property> </class> </hibernate-mapping>
附录说明:
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="com.skyedu.bean"> <class name="Login" table="login"> <id name="lid" column="lid" > <generator class="foreign"> <param name="property">userinfo</param> </generator> </id> <property name="lname" column="lname" length="30"></property> <property name="lpassword" column="lpassword" length="30" ></property> <one-to-one name="userinfo" class="UserInfo" constrained="true" cascade="save-update" ></one-to-one> </class> </hibernate-mapping>
测试代码:
@Test public void save(){ Session session= HibernateUtil.getSession(); Transaction transaction = session.beginTransaction(); try{ UserInfo userinfo = new UserInfo(); userinfo.setUname("魏丹"); userinfo.setUsex(true); Login login = new Login(); login.setLname("weidan"); login.setLpassword("weidan"); login.setUserinfo(userinfo); session.save(login); transaction.commit(); }catch(Exception e){ transaction.rollback(); }finally{ session.close(); } } @Test public void find(){ Session session= HibernateUtil.getSession(); Login login = (Login) session.get(Login.class,3); System.out.println("loginName:"+login.getLname()); System.out.println("userName:"+login.getUserinfo().getUname()); } // public static void main(String[] args) { // HibernateUtil.createTable(); // }