Hibernate学习-9-一对一映射

package com.cx.one2one;

/**
 * Created by cxspace on 16-8-3.
 */
public class User {

    private int userId;

    private String userName;

    //用户与身份证信息,一对一映射

    private IdCard idCard;

    public IdCard getIdCard() {
        return idCard;
    }

    public void setIdCard(IdCard idCard) {
        this.idCard = idCard;
    }

    public int getUserId() {
        return userId;
    }

    public void setUserId(int userId) {
        this.userId = userId;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }
}

package com.cx.one2one;

/**
 * Created by cxspace on 16-8-3.
 */
public class IdCard {

    private String cardNum; //身份证号作为主键

    private String place;

    private User user;

    public String getCardNum() {

        return cardNum;
    }

    public void setCardNum(String cardNum) {
        this.cardNum = cardNum;
    }

    public String getPlace() {
        return place;
    }

    public void setPlace(String place) {
        this.place = place;
    }

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }
}

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="com.cx.one2one">
     <class name="User" table="t_user">
         <id name="userId">
             <generator class="native"></generator>
         </id>

         <property name="userName" length="20"></property>

         <!--一对一映射-->

         <one-to-one name="idCard" class="IdCard"></one-to-one>
     </class>


</hibernate-mapping>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="com.cx.one2one">
    <class name="IdCard" table="t_IdCard">
        <id name="cardNum">
            <generator class="assigned"></generator>
        </id>

        <property name="place" length="20"></property>

        <!--
          一对一映射，有外键方

          unique=“true”  给外键字段添加唯一约束

        -->

        <many-to-one name="user" unique="true" column="user_id" class="User" cascade="save-update"></many-to-one>

    </class>
</hibernate-mapping>

package com.cx.one2one;

/**
 * Created by cxspace on 16-8-3.
 */

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;


public class Test {

    private static SessionFactory sf;
    static {
        sf = new Configuration()
                .configure()
                .addClass(IdCard.class)
                .addClass(User.class)   // 测试时候使用
                .buildSessionFactory();
    }

    @org.junit.Test
    public void save(){

        Session session = sf.openSession();
        session.beginTransaction();

        User user = new User();
        user.setUserName("jack");

        IdCard idCard = new IdCard();
        idCard.setCardNum("3324778###");
        idCard.setPlace("广州×××");

        idCard.setUser(user);

        session.save(idCard);

        session.getTransaction().commit();
        session.close();


        /*
        *   Hibernate:
                insert
                into
                    t_user
                    (userName)
                values
                    (?)
            Hibernate:
                insert
                into
                    t_IdCard
                    (place, user_id, cardNum)
                values
                    (?, ?, ?)
        *
        * */
    }
}

package com.cx.one2one2;



/**
 * Created by cxspace on 16-8-3.
 */
public class User {

    private int userId;
    private String userName;
    private IdCard idCard;

    public IdCard getIdCard() {
        return idCard;
    }

    public void setIdCard(IdCard idCard) {
        this.idCard = idCard;
    }

    public int getUserId() {
        return userId;
    }

    public void setUserId(int userId) {
        this.userId = userId;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }
}

package com.cx.one2one2;


/**
 * Created by cxspace on 16-8-3.
 */
public class IdCard {

    private int  user_id;

    private String cardNum;

    private String place;

    private User user;

    public String getCardNum() {
        return cardNum;
    }

    public void setCardNum(String cardNum) {
        this.cardNum = cardNum;
    }

    public String getPlace() {
        return place;
    }

    public void setPlace(String place) {
        this.place = place;
    }

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    public int getUser_id() {
        return user_id;
    }

    public void setUser_id(int user_id) {
        this.user_id = user_id;
    }
}

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="com.cx.one2one2">
     <class name="User" table="t_user">
         <id name="userId">
             <generator class="native"></generator>
         </id>

         <property name="userName" length="20"></property>

         <!--
         一对一映射
         没有外键的一方
         -->

         <one-to-one name="idCard" class="IdCard"></one-to-one>
     </class>


</hibernate-mapping>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="com.cx.one2one2">
    <class name="IdCard" table="t_IdCard">
        <id name="user_id">
     <!--

      id节点指定是主键映射，即user_id 是主键

      主键的生成方式未foreign 即把别的表的主键作为当前表的主键

      属性说明

       property指定引用的对象

     -->
            <generator class="foreign">

                <param name="property">user</param>

            </generator>

        </id>

        <property name="cardNum" length="20"></property>
        <property name="place" length="20"></property>

        <!--

           一对一映射,有外键的一方

          constrained="true" 指定在主键上添加外键约束
        -->

        <one-to-one name="user" class="User" constrained="true" cascade="save-update"></one-to-one>

    </class>
</hibernate-mapping>

package com.cx.one2one2;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
/**
 * Created by cxspace on 16-8-3.
 */
public class Test {

    private static SessionFactory sf;
    static {
        sf = new Configuration()
                .configure()
                .addClass(IdCard.class)
                .addClass(User.class)   // 测试时候使用
                .buildSessionFactory();
    }


    @org.junit.Test
    public void save(){


        Session session = sf.openSession();
        session.beginTransaction();

        // 用户
        User user = new User();
        user.setUserName("mike");
        // 身份证
        IdCard idCard = new IdCard();
        idCard.setCardNum("441202XXX");
        idCard.setPlace("南昌XXX");
        // 关系
        idCard.setUser(user);

        // ----保存----
        session.save(idCard);

        session.getTransaction().commit();
        session.close();

    }


    /*
    *
    *   Hibernate:
            insert
            into
                t_user
                (userName)
            values
                (?)
        Hibernate:
            insert
            intt_projecto
                t_IdCard
                (cardNum, place, user_id)
            values
                (?, ?, ?)
    *
    * */
}