hibernate 一对一双向联系关系_外键

hibernate 一对一双向关联_外键

这种情况是多对一的特例，即外键不准重复。

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1.单向一对一

Person类：

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

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Person配置文件：

<?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.domain.Person" table="t_person"><id name="id"><generator unique="true"/></class></hibernate-mapping>

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IdCard类：

package com.bjpowernode.hibernate.domain;public class IdCard {private int id;private String name;public String getName() {return name;}public void setName(String name) {this.name = name;}public int getId() {return id;}public void setId(int id) {this.id = id;}/*public Set getStudents() {return students;}public void setStudents(Set students) {this.students = students;}*/}

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IdCard配置文件：

<?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.domain.IdCard" table="t_idcard"><id name="id"><generator name="code">package com.bjpowernode.hibernate.domain;public class IdCard {private int id;private String name;private Person person;public String getName() {return name;}public void setName(String name) {this.name = name;}public int getId() {return id;}public void setId(int id) {this.id = id;}/*public Set getStudents() {return students;}public void setStudents(Set students) {this.students = students;}*/public Person getPerson() {return person;}public void setPerson(Person person) {this.person = person;}}

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IdCard配置文件：

<?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.domain.IdCard" table="t_idcard"><id name="id"><generator property-ref="idCard"/></class></hibernate-mapping>

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至此，双向一对一，外键策略完成。

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