hibernate3学习笔记(十九)｜关系映射：一对一

A.唯一外键关联

DDL：

1.CREATE TABLE user (2.    id INT(11) NOT NULL auto_increment PRIMARY KEY,3.    name VARCHAR(100) NOT NULL default '''',4.    room_id INT(11)5.);6.7.CREATE TABLE room (8.    id INT(11) NOT NULL auto_increment PRIMARY KEY,9.    address VARCHAR(100) NOT NULL default ''''10.);

User.java

1.package com.hb3.pack_02.model;2.3.public class User {4.
5.    private Integer id;6.    private String name;7.    private Room room;8.9.    public User() {10.    }11.
12.    public Integer getId() {13.        return id;14.    }15.    public void setId(Integer id) {16.        this.id = id;17.    }18.    public String getName() {19.        return name;20.    }21.    public void setName(String name) {22.        this.name = name;23.    }24.    public Room getRoom() {25.        return room;26.    }27.    public void setRoom(Room room) {28.        this.room = room;29.    }30.}

hibernate3学习笔记(十九)｜关系映射：一对一(2)

Room.java

1.package com.hb3.pack_02.model;2.3.public class Room {4.
5.    private Integer id;6.    private String address;7.    private User user;8.9.    public Room() {10.    }11.12.    public Integer getId() {13.        return id;14.    }15.    public void setId(Integer id) {16.        this.id = id;17.    }18.    public String getAddress() {19.        return address;20.    }21.    public void setAddress(String address) {22.        this.address = address;23.    }24.    public User getUser() {25.        return user;26.    }27.    public void setUser(User user) {28.        this.user = user;29.    }30.}

User.hbm.xml

1.<?xml version="1.0" encoding="UTF-8"?>2.
3.<!DOCTYPE hibernate-mapping PUBLIC4.    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"5.    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
6.
7.<hibernate-mapping>8.
9.    <class name="com.hb3.pack_02.model.User" table="user">10.        <id name="id" column="id" type="java.lang.Integer">11.            <generator class="native"/>12.        </id>13.14.        <property name="name" column="name" type="java.lang.String"/>15.16.        <many-to-one name="room"17.                     column="room_id"18.                     class="com.hb3.pack_02.model.Room"
19.                     cascade="all"
20.                     outer-join="true"
21.                     unique="true"/>22.    </class>23.
24.</hibernate-mapping>

hibernate3学习笔记(十九)｜关系映射：一对一(3)

Room.hbm.xml

1.<?xml version="1.0" encoding="UTF-8"?>2.
3.<!DOCTYPE hibernate-mapping PUBLIC4.    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"5.    "http://hibernate.sourceforge.n

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