hibernate1对1外键关联（单向）
package com.bjsxt.hibernate;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.JoinColumn;import javax.persistence.OneToOne;@Entitypublic class Husband {private int id;private String name;private Wife wife;@Id@GeneratedValuepublic int getId() {return id;}public String getName() {return name;}@OneToOne@JoinColumn(name="wifeId")public Wife getWife() {return wife;}public void setId(int id) {this.id = id;}public void setName(String name) {this.name = name;}public void setWife(Wife wife) {this.wife = wife;}}

wife.java

package com.bjsxt.hibernate;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;@Entitypublic class Wife {private int id;private String name;@Id@GeneratedValuepublic 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;}}

hibernate.cfg.xml

<?xml version='1.0' encoding='utf-8'?><!DOCTYPE hibernate-configuration PUBLIC        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"><hibernate-configuration>    <session-factory>                 <property name="connection.driver_class">com.mysql.jdbc.Driver</property>        <property name="connection.url">jdbc:mysql://localhost/hibernate</property>        <property name="connection.username">root</property>        <property name="connection.password">bjsxt</property>        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>       <!--        <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>        <property name="connection.url">jdbc:oracle:thin:@localhost:1521:SXT</property>        <property name="connection.username">scott</property>        <property name="connection.password">tiger</property>      <property name="dialect">org.hibernate.dialect.OracleDialect</property>       -->        <!-- JDBC connection pool (use the built-in) -->        <property name="connection.pool_size">1</property>                <!-- Enable Hibernate's automatic session context management -->        <property name="current_session_context_class">thread</property>        <!-- Disable the second-level cache  -->        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>        <!-- Echo all executed SQL to stdout -->        <property name="show_sql">true</property>        <property name="format_sql">true</property>        <!-- Drop and re-create the database schema on startup        <property name="hbm2ddl.auto">update</property> -->        <!--   -->        <mapping resource="com/bjsxt/hibernate/Student.hbm.xml"/>        <mapping resource="com/bjsxt/hibernate/StuIdCard.hbm.xml"/><mapping name="code">package com.bjsxt.hibernate;public class StuIdCard {private int id;private String num;private Student student;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getNum() {return num;}public void setNum(String num) {this.num = num;}public Student getStudent() {return student;}public void setStudent(Student student) {this.student = student;}}

package com.bjsxt.hibernate;public class Student {private int id;private String name;private int age;private String sex;private boolean good;public boolean isGood() {return good;}public void setGood(boolean good) {this.good = good;}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 int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}}

<?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><hibernate-mapping><class name="com.bjsxt.hibernate.Student" dynamic-update="true"><id name="id"><generator /><property name="sex" /><property name="good" type="yes_no"></property>    </class></hibernate-mapping>

<?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><hibernate-mapping><class name="com.bjsxt.hibernate.StuIdCard"><id name="id"><generator column="studentId" unique="true"></many-to-one>    </class></hibernate-mapping>

public class TestHibernate extends TestCase {private static SessionFactory sessionFactory;/* (non-Javadoc) * @see junit.framework.TestCase#setUp() */protected void setUp() throws Exception {sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();}/* (non-Javadoc) * @see junit.framework.TestCase#tearDown() */protected void tearDown() throws Exception {sessionFactory.close();}public void testSchemaExport() {new SchemaExport(new AnnotationConfiguration().configure()).create(false, true);}}[img] drop table if exists StuIdCard
23:54:47,765 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:377 -
drop table if exists Student
23:54:47,765 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:377 -
create table StuIdCard (
id integer not null,
num varchar(255),
primary key (id)
)
23:54:47,859 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:377 -
create table Student (
id integer not null auto_increment,
name varchar(255),
age integer,
sex varchar(255),
good char(1),
primary key (id)
)
23:54:47,968 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:377 -
alter table StuIdCard
add index FKD3A449FFEC65FB66 (id),
add constraint FKD3A449FFEC65FB66
foreign key (id)
references Student (id)
23:54:48,156 INFO org.hibernate.tool.hbm2ddl.SchemaExport:268 - schema export complete[/img]