hibernate一对一单向外键关联

package com.oracle.hibernate;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
public class Wife {

    
    private int id;
    private int age;
    @Id
    @GeneratedValue
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    
    
}

package com.oracle.hibernate;

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

@Entity
public class Husband {

    private int id;
    private String name;
    private Wife  wife;    //wife的引用
    
    @Id    //主键id
    @GeneratedValue    //自动生成
    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;
    }
    
    @OneToOne    //一对一映射
    //JoinColumn指定映射到表里哪个字段，不指定会自动生成的外键名为wife_id
    @JoinColumn(name="wifeId")
    public Wife getWife() {
        return wife;
    }
    public void setWife(Wife wife) {
        this.wife = wife;
    }
}

<mapping class="com.oracle.hibernate.Wife"/>
<mapping class="com.oracle.hibernate.Husband"/> 

package com.oracle.hibernate;

import org.hibernate.HibernateException;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.tool.hbm2ddl.SchemaExport;
import org.junit.AfterClass;
import org.junit.BeforeClass;



public class Test {

    private static SessionFactory  sf = null;
    @BeforeClass
    public static void beforeClass(){
        
        try {
            sf = new AnnotationConfiguration().configure().buildSessionFactory();
        } catch (HibernateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    
    @org.junit.Test
    public void testSchemaExport(){
        new SchemaExport(new AnnotationConfiguration().configure()).create(false, true);
        
    }
    @AfterClass
    public static void afterClass(){
        sf.close();
    }

}

 create table Husband (
        id integer not null auto_increment,
        name varchar(255),
        wifeId integer,
        primary key (id)
    )
21:52:31,236 DEBUG SchemaExport:377 - 
    create table Wife (
        id integer not null auto_increment,
        age integer not null,
        primary key (id)
    )
21:52:31,582 DEBUG SchemaExport:377 - 
    alter table Husband 
        add index FKAEEA401B796894FC (wifeId), 
        add constraint FKAEEA401B796894FC 
        foreign key (wifeId) 
        references Wife (id)