hibernate one-to-one外键关联

                                                                                        (丈夫和夫妻的一对一关系)

package org.hibernate.demo.entity;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToOne;

import sun.nio.cs.Surrogate.Generator;
@Entity
public class Husband implements Serializable
{
private Integer id;
private String name;
private Wife wife;
@Id
@GeneratedValue
public Integer getId()
{
  return id;
}

public void setId(Integer id)
{
  this.id = id;
}

public String getName()
{
  return name;
}

public void setName(String name)
{
  this.name = name;
}

//此处注解是一对一关系
@OneToOne
@JoinColumn(name="wife")
public Wife getWife()
{
  return wife;
}

public void setWife(Wife wife)
{
  this.wife = wife;
}

public Husband()
{
  // TODO Auto-generated constructor stub
}

}

------------------------------------------------------------------------------------------------------------------------------------------

package org.hibernate.demo.entity;

import java.io.Serializable;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
@Entity
public class Wife implements Serializable
{
private Integer id;
private String name;
@Id
@GeneratedValue
public Integer getId()
{
  return id;
}

public void setId(Integer id)
{
  this.id = id;
}

public String getName()
{
  return name;
}

public void setName(String name)
{
  this.name = name;
}

public Wife()
{
  // TODO Auto-generated constructor stub
}

}

--------------------上面是注解方式的one-to-one----------------------------

---------------------下面是xml方式-------------------------------

<?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 package="org.hibernate.demo.entity">
<class name="Wife">
<id name="id">
  <generator class="identity"></generator>
</id>
<property name="name"/>
</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 package="org.hibernate.demo.entity">
<class name="Husband">
  <id name="id">
   <generator class="identity" />
  </id>
  <property name="name" />
  <!-- 在xml中配置一对一的关系的时候，用的是many-to-one，unique=“true”就保证了一对一的关系 -->
  <many-to-one name="wife" column="wife" unique="true"></many-to-one>
</class>
</hibernate-mapping>