1.一对一单向主键关联(人对身份证) 对象,hbm

package com.bjpowernode.hibernate;public class IdCard {private int id;private String cardNo;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getCardNo() {return cardNo;}public void setCardNo(String cardNo) {this.cardNo = cardNo;}}

<?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><hibernate-mapping><class name="com.bjpowernode.hibernate.IdCard" table="t_idCard"><id name="id"><generator class="native"/></id><property name="cardNo"/></class></hibernate-mapping>

package com.bjpowernode.hibernate;public class Person {private int id;private String name;private IdCard idCard;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;}public IdCard getIdCard() {return idCard;}public void setIdCard(IdCard idCard) {this.idCard = idCard;}}

<?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><hibernate-mapping><class name="com.bjpowernode.hibernate.Person" table="t_person"><id name="id"><!-- 采用foreign生成策略，forgeign会取得关联对象的标识 --><generator class="foreign"><!-- property只关联对象 --><param name="property">idCard</param></generator></id><property name="name"/><!-- one-to-one指示hibernate如何加载其关联对象，默认根据主键加载也就是拿到关系字段值，根据对端的主键来加载关联对象constrained="true表示，当前主键(person的主键)还是一个外键参照了对端的主键（IdCard的主键），也就是会生成外键约束语句 --><one-to-one name="idCard" constrained="true"/></class></hibernate-mapping>