hibernate一对一主键关联
一对一主键关联指的是两个表通过主键形成的一对一映射。
数据表要求：A表的主键也是B表的主键同时B表的主键也是A表的外键
sql：
create table people(
id int primary key auto_increment,
name varchar(100) not null,
sex varchar(100) not null,
age int
)
create table idcard(
id int primary key,
idcard_code varchar(50) not null,
FOREIGN KEY(id) REFERENCES people(id)
)
单向主键关联映射：
package com.demo.hibernate.beans;
public class IDcard {
private int id;
private String idcard_code;
private People people;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getIdcard_code() {
return idcard_code;
}
public void setIdcard_code(String idcardCode) {
idcard_code = idcardCode;
}
public People getPeople() {
return people;
}
public void setPeople(People people) {
this.people = people;
}
public IDcard(int id, String idcardCode, People people) {
super();
this.id = id;
idcard_code = idcardCode;
this.people = people;
}
public IDcard(){}
}
package com.demo.hibernate.beans;
public class People {
private int id;
private String name;
private String sex;
private int age;
//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 String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
/*public IDcard getIdcard() {
return idcard;
}
public void setIdcard(IDcard idcard) {
this.idcard = idcard;
}*/
public People(int id, String name, String sex, int age) {
super();
this.id = id;
this.name = name;
this.sex = sex;
this.age = age;
}
public People(){}
}
<?xml version="1.0" encoding="UTF-8"?>
<!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.demo.hibernate.beans.User" table="USER">
<id name="id" type="int">
<column name="id"></column><!-- 注意column要放在前面 -->
<generator class="foreign">
<param name="property">people</param>
</generator>
</id> <property name="idcard_code" type="string" column="IDCARD_CODE"/> <one-to-one name="prople" class="com.demo.hibernate.beans.People" property-ref="IDcard" cascade="all"></one-to-one><!--这里要选定好级联操作cascade属性不然可能不会级联持久化类的另一个表--> </class>
</hibernate-mapping>
test：
import com.demo.hibernate.beans.IDcard;
import com.demo.hibernate.beans.People;
import com.demo.hibernate.dao.IDcardDAO;
import com.demo.hibernate.dao.PeopleDAO; public class IDcardService {
public static void main(String[] args){
PeopleDAO pdao=new PeopleDAO();
IDcardDAO iddao=new IDcardDAO();
IDcard idcard=new IDcard();
idcard.setIdcard_code("362421199610126814");
People people=new People();
people.setName("guo");
people.setAge(21);
people.setSex("男");
idcard.setPeople(people);
iddao.addIDcard(idcard);
} }
结果：
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" alt="" />
双向多对一：
前面单向的配置不变，在原来的People基础上加上对应的IDcard对象以及修改People.hbm.xml
People.java---->把前面的注释去掉
People.hbm.xml---->
<?xml version="1.0" encoding="UTF-8"?>
<!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.demo.hibernate.beans.People" table="PEOPLE">
<id name="id" type="int">
<column name="id"></column><!-- 注意column要放在前面 -->
<generator class="native"></generator>
</id> <property name="name" type="string" column="NAME"/> <property name="sex" type="string" column="SEX"/> <property name="age" type="int" column="AGE"/> <one-to-one name="idcard" class="com.demo.hibernate.beans.IDcard" property-ref="people" cascade="all"></one-to-one> </class>
</hibernate-mapping>
Test:
public static void main(String[] args){
PeopleDAO dao=new PeopleDAO();
People people=new People();
people.setName("guon");
people.setAge(28);
people.setSex("女");
IDcard card=new IDcard();
card.setIdcard_code("362421199610116734");
people.setIdcard(card);
card.setPeople(people);
dao.addPeople(people);
}
注意双向与单向的test页面有区别的，在于People和IDcard对象里面都含有对方的对象，必须全部添加进入，否则会报错误，错误是关于主键的类型与策略不符合。
结果：
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" alt="" />
一对一外键关联：
单向（特殊的many-to-one，在many-to-one上加上unique=“true”）：
create table person(
id int primary key auto_increment,
name varchar(100),
age int,
addressid int unique
)
create table address(
id int primary key auto_increment,
detail varchar(100)
) alter table person
add constraint fk_per_add foreign key (addressid) references address (id);
SQL
package com.entity;
public class Person {
private int id;
private String name;
private int age;
private Address address;
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 int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public Address getAddress() {
return address;
}
public void setAddress(Address address) {
this.address = address;
}
public Person(){}
}
Person.java
<?xml version="1.0" encoding="utf-8"?>
<!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.entity.Person" table="PERSON">
<id name="id" type="int">
<column name="id"></column>
<generator class="identity"></generator>
</id>
<property name="name" type="string">
<column name="NAME"></column>
</property>
<property name="age" type="int">
<column name="AGE"></column>
</property>
<many-to-one name="address" class="com.entity.Address" unique="true" cascade="all">
<column name="addressid"></column>
</many-to-one>
</class> </hibernate-mapping>
注意在多对一里面也要加上cascade="all"这种条件，当然可能值不是all
关于address的话就是普通的持久化类和映射文件
双向（前面与单向相同，附表采用one-to-one配置）：
<?xml version="1.0" encoding="utf-8"?>
<!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.entity.Address" table="ADDRESS">
<id name="id" type="int">
<column name="id"></column>
<generator class="identity"></generator>
</id> <property name="detail" type="string">
<column name="detail"></column>
</property> <one-to-one name="person" class="com.entity.Person" cascade="all" property-ref="address"> </one-to-one>
</class> </hibernate-mapping>
Address.hbm.xml
package com.entity;
public class Address {
private int id;
private String detail;
private Person person;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getDetail() {
return detail;
}
public void setDetail(String detail) {
this.detail = detail;
}
public Address(){}
public void setPerson(Person person) {
this.person = person;
}
public Person getPerson() {
return person;
}
}
package com.server; import com.dao.AddressDAO;
import com.entity.Address;
import com.entity.Person; public class Test {
public static void main(String[] args){
AddressDAO addressdao=new AddressDAO(); Address address=new Address();
address.setDetail("江西生物科技职业学院！");
Person p=new Person();
p.setName("guozhen");
p.setAge(21);
p.setAddress(address);
address.setPerson(p);
addressdao.addAddress(address);
} }
Test
注意：在one-to-one中写上property-ref=“” 属性为另一持久化了类的相关联的属性名