hibernate中one-to-one两种配置方式

public class Person {private int id;private String name;private IdCard idCard;public Person() {}public Person(int id, String name, IdCard idCard) {this.id = id;this.name = name;this.idCard = idCard;}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public IdCard getIdCard() {return idCard;}public void setIdCard(IdCard idCard) {this.idCard = idCard;}}

public class IdCard {private int id;private Date usefullLife;private Person person;public IdCard() {}public IdCard(int id, Date usefullLife, Person person) {this.id = id;this.usefullLife = usefullLife;this.person = person;}public int getId() {return id;}public void setId(int id) {this.id = id;}public Date getUsefullLife() {return usefullLife;}public void setUsefullLife(Date usefullLife) {this.usefullLife = usefullLife;}public Person getPerson() {return person;}public void setPerson(Person person) {this.person = person;}}

one-to-one方式一：

IdCard.hbm.xml

<?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"><!--Mapping file autogenerated by MyEclipse Persistence Tools--><hibernate-mapping><class name="com.huawei.domain.IdCard" table="id_card"><id name="id" type="java.lang.Integer"><column name="id" /><generator class="foreign" ><param name="property">person</param></generator></id><property name="usefullLife" type="java.util.Date"><column name="usefull_life"/></property><one-to-one name="person" constrained="true"></one-to-one></class></hibernate-mapping>

Person.hbm.xml

<?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"><!--Mapping file autogenerated by MyEclipse Persistence Tools--><hibernate-mapping><class name="com.huawei.domain.Person"><id name="id" type="java.lang.Integer"><column name="id" /><generator class="native" /></id><property name="name" type="java.lang.String"><column name="name" length="5" not-null="false" /></property><one-to-one name="idCard"></one-to-one></class></hibernate-mapping>

one-to-one方式二：

IdCard.hbm.xml

<?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"><!--Mapping file autogenerated by MyEclipse Persistence Tools--><hibernate-mapping><class name="com.huawei.domain.IdCard" table="id_card"><id name="id" type="java.lang.Integer"><!-- <column name="id" /><generator class="foreign" ><param name="property">person</param></generator> --> <column name="id" /> <generator class="native" /></id><property name="usefullLife" type="java.util.Date"><column name="usefull_life"/></property><!-- <one-to-one name="person" constrained="true"></one-to-one> --><many-to-one name="person" column="person_id" unique="true"></many-to-one></class></hibernate-mapping>

Person.hbm.xml

<?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"><!--Mapping file autogenerated by MyEclipse Persistence Tools--><hibernate-mapping><class name="com.huawei.domain.Person"><id name="id" type="java.lang.Integer"><column name="id" /><generator class="native" /></id><property name="name" type="java.lang.String"><column name="name" length="5" not-null="false" /></property><one-to-one name="idCard" property-ref="person"></one-to-one></class></hibernate-mapping>

测试：

Session s = null;try{s = HibernateSessionFactory.getSession();//Person person = (Person)s.get(Person.class, id);//System.out.println(person.getIdCard().getUsefullLife());IdCard idCard = (IdCard)s.get(IdCard.class, id);System.out.println(idCard.getPerson().getName());} catch (HibernateException e) {e.printStackTrace();}