<?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="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>

        <property name="hibernate.connection.password">root</property>

        <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/test</property>

        <property name="hibernate.connection.username">root</property>

        <property name="hibernate.show_sql">true</property>

        <property name="hibernate.format_sql">true</property>

        <property name="hibernate.hbm2ddl.auto">update</property>

        <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>

        <property name="current_session_context_class">thread</property>

        <!--

        <mapping resource="com/chinasofti/entity/User.hbm.xml"/>

        <mapping resource="com/chinasofti/entity/Role.hbm.xml"/>

         -->

        <mapping class="com.chinasofti.entity.Person"/>

        <mapping class="com.chinasofti.entity.Card"/>

    </session-factory>

</hibernate-configuration>

package com.chinasofti.entity;

import javax.persistence.CascadeType;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.GenerationType;

import javax.persistence.Id;

import javax.persistence.JoinColumn;

import javax.persistence.OneToOne;

import javax.persistence.Table;

@Entity

@Table(name="T_Person")

public class Person {

    @Id

    @GeneratedValue(strategy=GenerationType.IDENTITY)

    private Integer pid;

    private String pname;

    @OneToOne(cascade=CascadeType.ALL,mappedBy="person")

    @JoinColumn(name="pid")

    private Card card;

    public Integer getPid() {

        return pid;

    }

    public void setPid(Integer pid) {

        this.pid = pid;

    }

    public String getPname() {

        return pname;

    }

    public void setPname(String pname) {

        this.pname = pname;

    }

    public Card getCard() {

        return card;

    }

    public void setCard(Card card) {

        this.card = card;

    }

    @Override

    public String toString() {

        return "Person [pid=" + pid + ", pname=" + pname + ", card=" + card

                + "]";

    }

}

package com.chinasofti.entity;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.GenerationType;

import javax.persistence.Id;

import javax.persistence.JoinColumn;

import javax.persistence.OneToOne;

import javax.persistence.Table;

@Entity

@Table(name="T_Card")

public class Card {

    @Id

    @GeneratedValue(strategy=GenerationType.IDENTITY)

    private Integer cid;

    private String cnum;

    @OneToOne

    @JoinColumn(name="pid")

    private Person person;

    public Integer getCid() {

        return cid;

    }

    public void setCid(Integer cid) {

        this.cid = cid;

    }

    public String getCnum() {

        return cnum;

    }

    public void setCnum(String cnum) {

        this.cnum = cnum;

    }

    public Person getPerson() {

        return person;

    }

    public void setPerson(Person person) {

        this.person = person;

    }

    @Override

    public String toString() {

        return "Card [cid=" + cid + ", cnum=" + cnum + ", person=" + person

                + "]";

    }

}

package com.chinasofti.entity;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.Configuration;

public class HibernateUtil {

    static Configuration CONFIGURATION = null;

    static SessionFactory SESSION_FACTORY = null;

    static Session SESSION = null;

    static{

        CONFIGURATION = new Configuration();

        CONFIGURATION.configure();

        SESSION_FACTORY = CONFIGURATION.buildSessionFactory();

        SESSION    = SESSION_FACTORY.openSession();

    }

    public static SessionFactory getSessionFactory(){

        return SESSION_FACTORY;

    }

    public static Session openSession(){

        return SESSION;

    }

}

package com.chinasofti.entity;

import org.hibernate.Session;

import org.hibernate.Transaction;

import org.junit.Test;

public class TestOneOne {

    @Test

    public void test1to1(){

        Session session = HibernateUtil.openSession();

        Transaction transaction = session.beginTransaction();

        Person person = session.get(Person.class, 1);

        session.delete(person);

        transaction.commit();

        session.close();

    }

}