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Hibernate双向一对一映射关系配置代码实例

2023-07-13 03:02:04 164

1、外键映射

1.1、实体类

packagecom.yl.bean;

importjava.io.Serializable;

/**
*公民实体类
*/
publicclassPersonimplementsSerializable{
privateIntegerid;
privateStringname;
privatePersonCardcard;

publicPerson(){
}

publicPerson(Integerid,Stringname,PersonCardcard){
this.id=id;
this.name=name;
this.card=card;
}

publicIntegergetId(){
returnid;
}

publicvoidsetId(Integerid){
this.id=id;
}

publicStringgetName(){
returnname;
}

publicvoidsetName(Stringname){
this.name=name;
}

publicPersonCardgetCard(){
returncard;
}

publicvoidsetCard(PersonCardcard){
this.card=card;
}

@Override
publicStringtoString(){
return"Person{"+
"id="+id+
",name='"+name+'\''+
",card="+card+
'}';
}
}

packagecom.yl.bean;

importjava.io.Serializable;

/**
*身份证实体类
*/
publicclassPersonCardimplementsSerializable{
privateIntegerid;
privateStringcardNo;
privatePersonperson;

publicPersonCard(){
}

publicPersonCard(Integerid,StringcardNo,Personperson){
this.id=id;
this.cardNo=cardNo;
this.person=person;
}

publicIntegergetId(){
returnid;
}

publicvoidsetId(Integerid){
this.id=id;
}

publicStringgetCardNo(){
returncardNo;
}

publicvoidsetCardNo(StringcardNo){
this.cardNo=cardNo;
}

publicPersongetPerson(){
returnperson;
}

publicvoidsetPerson(Personperson){
this.person=person;
}

@Override
publicStringtoString(){
return"PersonCard{"+
"id="+id+
",cardNo='"+cardNo+'\''+
",person="+person+
'}';
}
}

1.2、全局配置文件(hibernate.cfg.xml)





com.mysql.cj.jdbc.Driver
jdbc:mysql://localhost:3306/hibernate?characterEncoding=utf8&serverTimezone=GMT%2B8
root
123456

true

update

1.3、公民映射配置文件(Person.hbm.xml)

1.4、身份证映射配置文件（PersonCard.hbm.xml）

1.5、测试类

@Test
publicvoidtest01(){
Personperson=newPerson();
person.setName("yl001");

PersonCardpersonCard=newPersonCard();
personCard.setCardNo("001");

person.setCard(personCard);
personCard.setPerson(person);

Sessionsession=HibernateUtils.getSession();
Transactiontransaction=session.beginTransaction();
session.save(person);
session.save(personCard);
transaction.commit();

session.close();
}

2、主键映射

表的字段既是主键，又是外键(eg:身份证号码既是主键又是外键)

2.1、映射配置文件实现

主要修改PersonCard.hbm.xml文件

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。

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Hibernate双向一对一映射关系配置代码实例

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