Hibernate实现one-to-one级联保存[转载]
库表:
CARD_TEST(CARDID[NUMBER(18)],CARDNUM[VARCHAR2(20)])
USER_TEST(USERID[NUMBER(18)],USERNAME[VARCHAR2(20)])
TestMain.java
package com.gpdi.test;
import org.hibernate.Session;
import org.hibernate.Transaction;
public class TestMain {
/**
?* 存储一个用户
?* @param user
?*/
public void save(User user){
?user.setUsername("TEST");
?Card card=new Card();
?//Card card1=new Card();
?card.setCardnum("HGJUYT");
?//card1.setCardnum("fghy55");
?user.setCard(card);
?//user.setCard(card1);
?Session session=HibernateSessionFactory.currentSession();
??? card.setUser(user);
??? //card1.setUser(user);
?Transaction tr=session.beginTransaction();
?session.save(user);
?//session.save(card);
?tr.commit();
?session.close();?
}
?public static void main(String[] args) throws Exception {
??TestMain test=new TestMain();
???? test.save(new User());
?}
}
Card.java
?
package com.gpdi.test;
/**
?* Card generated by MyEclipse - Hibernate Tools
?*/
public class Card? implements java.io.Serializable {
??? // Fields???
???? private Integer cardid;
???? private String cardnum;
???? private User user;
??? // Constructors
??? public User getUser() {
??return user;
?}
?public void setUser(User user) {
??this.user = user;
?}
?/** default constructor */
??? public Card() {
??? }
??? /** full constructor */
??? public Card(String cardnum) {
??????? this.cardnum = cardnum;
??? }
??? // Property accessors
??? public Integer getCardid() {
??????? return this.cardid;
??? }
???
??? public void setCardid(Integer cardid) {
??????? this.cardid = cardid;
??? }
??? public String getCardnum() {
??????? return this.cardnum;
??? }
???
??? public void setCardnum(String cardnum) {
??????? this.cardnum = cardnum;
??? }
}
?
User.java
package com.gpdi.test;
import java.util.HashSet;
import java.util.Set;
/**
?* User generated by MyEclipse - Hibernate Tools
?*/
public class User? implements java.io.Serializable {
??? // Fields???
???? private Integer userid;
???? private String username;
???? private Card card;
???? //private Set card = new HashSet();
??? // Constructors
??? public Card getCard() {
??return card;
?}
?public void setCard(Card card) {
??this.card = card;
?}
?/** default constructor */
??? public User() {
??? }
??? /** full constructor */
??? public User(String username) {
??????? this.username = username;
??? }
??? // Property accessors
??? public Integer getUserid() {
??????? return this.userid;
??? }
???
??? public void setUserid(Integer userid) {
??????? this.userid = userid;
??? }
??? public String getUsername() {
??????? return this.username;
??? }
???
??? public void setUsername(String username) {
??????? this.username = username;
??? }
}
HibernateSessionFactory.java
?
package com.gpdi.test;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
/**
?* Configures and provides access to Hibernate sessions, tied to the
?* current thread of execution.? Follows the Thread Local Session
?* pattern, see {@link http://hibernate.org/42.html}.
?*/
public class HibernateSessionFactory {
??? /**
???? * Location of hibernate.cfg.xml file.
???? * NOTICE: Location should be on the classpath as Hibernate uses
???? * #resourceAsStream style lookup for its configuration file. That
???? * is place the config file in a Java package - the default location
???? * is the default Java package.<br><br>
???? * Examples: <br>
???? * <code>CONFIG_FILE_LOCATION = "/hibernate.conf.xml".
???? * CONFIG_FILE_LOCATION = "/com/foo/bar/myhiberstuff.conf.xml".</code>
???? */
??? private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
??? /** Holds a single instance of Session */
?private static final ThreadLocal threadLocal = new ThreadLocal();
??? /** The single instance of hibernate configuration */
??? private static final Configuration cfg = new Configuration();
??? /** The single instance of hibernate SessionFactory */
??? private static org.hibernate.SessionFactory sessionFactory;
??? /**
???? * Returns the ThreadLocal Session instance.? Lazy initialize
???? * the <code>SessionFactory</code> if needed.
???? *
???? *? @return Session
???? *? @throws HibernateException
???? */
??? public static Session currentSession() throws HibernateException {
??????? Session session = (Session) threadLocal.get();
??if (session == null || !session.isOpen()) {
???if (sessionFactory == null) {
????try {
?????cfg.configure(CONFIG_FILE_LOCATION);
?????sessionFactory = cfg.buildSessionFactory();
????} catch (Exception e) {
?????System.err
???????.println("%%%% Error Creating SessionFactory %%%%");
?????e.printStackTrace();
????}
???}
???session = (sessionFactory != null) ? sessionFactory.openSession()
?????: null;
???threadLocal.set(session);
??}
??????? return session;
??? }
??? /**
???? *? Close the single hibernate session instance.
???? *
???? *? @throws HibernateException
???? */
??? public static void closeSession() throws HibernateException {
??????? Session session = (Session) threadLocal.get();
??????? threadLocal.set(null);
??????? if (session != null) {
??????????? session.close();
??????? }
??? }
??? /**
???? * Default constructor.
???? */
??? private HibernateSessionFactory() {
??? }
}
Card.hbm.xml
<?xml version="1.0"?>
<!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 - Hibernate Tools
-->
<hibernate-mapping>
??? <class name="com.gpdi.test.Card" table="CARD_TEST">
?
??????? <id name="cardid" type="integer">
??????????? <column name="CARDID" />
??????????? <generator >
??????????? <param name="property">user</param>
??????????? </generator>
??????? </id>
??????? <property name="cardnum" type="string">
??????????? <column name="CARDNUM" length="45" not-null="true" />
??????? </property>
??????? <!--
??????? foreign-key="userid"指定外键关联的字段,必须,不可缺少 ,cascade="save-update"指定怎么操作级联,非必须
??????? -->
?????? <one-to-one name="user" foreign-key="userid" cascade="save-update"></one-to-one>
??? </class>
</hibernate-mapping>
User.hbm.xml
<?xml version="1.0"?>
<!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 - Hibernate Tools
-->
<hibernate-mapping>
??? <class name="com.gpdi.test.User" table="USER_TEST">
??????? <id name="userid" type="integer">
??????????? <column name="USERID" />
??????????? <generator type="string">
??????????? <column name="username" length="45" not-null="true" />
??????? </property>
??????? <one-to-one name="card" foreign-key="cardid" cascade="save-update"></one-to-one>
??????? <!--
?????? <set name="card" inverse="true" cascade="all">
??????? <key column="cardid" />
??????? <one-to-many />
??????? </set>
???????? <many-to-one? name="card" unique="true" lazy="false">
??????? ?<column name="cardid"? length="18"? />
??????? </many-to-one>
??????? -->
?
??? </class>
</hibernate-mapping>
