hibernate 一对一 one to one的两种配置方式

hibernate中one-to-one两种配置方式

标签： hibernateHibernateone-to-one

2013-02-19 17:44 11445人阅读 评论(1) 收藏 举报

 分类：

hibernate（2） 

版权声明：本文为博主原创文章，未经博主允许不得转载。

1. public class Person {
2. private int id;
3. private String name;
4. private IdCard idCard;
5. public Person() {
6. }
7. public Person(int id, String name, IdCard idCard) {
8. this.id = id;
9. this.name = name;
10. this.idCard = idCard;
11. }
12. public int getId() {
13. return id;
14. }
15. public void setId(int id) {
16. this.id = id;
17. }
18. public String getName() {
19. return name;
20. }
21. public void setName(String name) {
22. this.name = name;
23. }
24. public IdCard getIdCard() {
25. return idCard;
26. }
27. public void setIdCard(IdCard idCard) {
28. this.idCard = idCard;
29. }
30. }

1. public class IdCard {
2. private int id;
3. private Date usefullLife;
4. private Person person;
5. public IdCard() {
6. }
7. public IdCard(int id, Date usefullLife, Person person) {
8. this.id = id;
9. this.usefullLife = usefullLife;
10. this.person = person;
11. }
12. public int getId() {
13. return id;
14. }
15. public void setId(int id) {
16. this.id = id;
17. }
18. public Date getUsefullLife() {
19. return usefullLife;
20. }
21. public void setUsefullLife(Date usefullLife) {
22. this.usefullLife = usefullLife;
23. }
24. public Person getPerson() {
25. return person;
26. }
27. public void setPerson(Person person) {
28. this.person = person;
29. }
30. }

one-to-one方式一：

IdCard.hbm.xml

1. <?xml version="1.0" encoding="utf-8"?>
2. <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
3. "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
4. <!--
5. Mapping file autogenerated by MyEclipse Persistence Tools
6. -->
7. <hibernate-mapping>
8. <class name="com.huawei.domain.IdCard" table="id_card">
9. <id name="id" type="java.lang.Integer">
10. <column name="id" />
11. <generator class="foreign" >
12. <param name="property">person</param>
13. </generator>
14. </id>
15. <property name="usefullLife" type="java.util.Date">
16. <column name="usefull_life"/>
17. </property>
18. <one-to-one name="person" constrained="true"></one-to-one>
19. </class>
20. </hibernate-mapping>

Person.hbm.xml

1. <?xml version="1.0" encoding="utf-8"?>
2. <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
3. "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
4. <!--
5. Mapping file autogenerated by MyEclipse Persistence Tools
6. -->
7. <hibernate-mapping>
8. <class name="com.huawei.domain.Person">
9. <id name="id" type="java.lang.Integer">
10. <column name="id" />
11. <generator class="native" />
12. </id>
13. <property name="name" type="java.lang.String">
14. <column name="name" length="5" not-null="false" />
15. </property>
16. <one-to-one name="idCard"></one-to-one>
17. </class>
18. </hibernate-mapping>

one-to-one方式二：

IdCard.hbm.xml

1. <?xml version="1.0" encoding="utf-8"?>
2. <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
3. "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
4. <!--
5. Mapping file autogenerated by MyEclipse Persistence Tools
6. -->
7. <hibernate-mapping>
8. <class name="com.huawei.domain.IdCard" table="id_card">
9. <id name="id" type="java.lang.Integer">
10. <!--
11. <column name="id" />
12. <generator class="foreign" >
13. <param name="property">person</param>
14. </generator>
15. -->
16. <column name="id" />
17. <generator class="native" />
18. </id>
19. <property name="usefullLife" type="java.util.Date">
20. <column name="usefull_life"/>
21. </property>
22. <!--         <one-to-one name="person" constrained="true"></one-to-one> -->
23. <many-to-one name="person" column="person_id" unique="true"></many-to-one>
24. </class>
25. </hibernate-mapping>

Person.hbm.xml

1. <?xml version="1.0" encoding="utf-8"?>
2. <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
3. "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
4. <!--
5. Mapping file autogenerated by MyEclipse Persistence Tools
6. -->
7. <hibernate-mapping>
8. <class name="com.huawei.domain.Person">
9. <id name="id" type="java.lang.Integer">
10. <column name="id" />
11. <generator class="native" />
12. </id>
13. <property name="name" type="java.lang.String">
14. <column name="name" length="5" not-null="false" />
15. </property>
16. <one-to-one name="idCard" property-ref="person"></one-to-one>
17. </class>
18. </hibernate-mapping>

测试：

1. Session s = null;
2. try{
3. s = HibernateSessionFactory.getSession();
4. //          Person person = (Person)s.get(Person.class, id);
5. //          System.out.println(person.getIdCard().getUsefullLife());
6. IdCard idCard = (IdCard)s.get(IdCard.class, id);
7. System.out.println(idCard.getPerson().getName());
8. } catch (HibernateException e) {
9. e.printStackTrace();
10. }