hibernate3学习笔记(十九)｜关系映射:一对一[Java编程]

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.}

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