一对一外键双向关联
--oracle数据库
//idcard表里面有个pid ，因为有了人才会有身份证。有个先后顺序吧。
1，建表脚本
-- 删除表
DROP TABLE person ;
DROP TABLE idcard ;
-- 创建表
CREATE TABLE person
(
?pid VARCHAR(32) PRIMARY KEY NOT NULL,
?name VARCHAR(20)
) ;
CREATE TABLE idcard
(
?id VARCHAR(32) PRIMARY KEY NOT NULL ,
?name VARCHAR(20) NOT NULL ,
?age INT ,
?pid VARCHAR(32)
) ;
commit ;
?
2、#############################??? pojo类
//<1>IdCard 类
?
package org.onetoone4.com;
public class IdCard {
?private String id ;
?private String name ;
?private int age;
?private Person person ;
?
?public String getId() {
??return id;
?}
?public void setId(String 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 Person getPerson() {
??return person;
?}
?public void setPerson(Person person) {
??this.person = person;
?}
}
//<2>Person 类
?
package org.onetoone4.com;
public class Person {
?private String pid;
?private String name;
?
?private IdCard idcard;
?public String getPid() {
??return pid;
?}
?public void setPid(String pid) {
??this.pid = pid;
?}
?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;
?}
}
3、pojo对应的hibernate配置文件
<1>IdCard.hbm.xml
?
<hibernate-mapping>
?<class name="org.onetoone4.com.Person" table="person">
??<id name="pid" type="java.lang.String">
???<column name="pid" length="32" />
???<generator type="java.lang.String">
???<column name="name" length="20" not-null="true" />
??</property>
??<one-to-one name="idcard"
???property-ref="person">
??</one-to-one>
?</class>
</hibernate-mapping>
?
4、测试类 PersonGroupOperate
?
public class PersonGroupOperate {
?private Session session;
?public PersonGroupOperate() {
??this.session = new Configuration().configure().buildSessionFactory()
????.openSession();
?}
?public void insert(IdCard ic) {
??this.session.save(ic);
??this.session.beginTransaction().commit();
?}
?
?public void insert(Person per) {
??this.session.save(per);
??this.session.beginTransaction().commit();
?}
?
?/**
? * @param args
? */
?public static void main(String[] args) {
??PersonGroupOperate pgo = new PersonGroupOperate();
??
??
??Person per = new Person();
??per.setName("LXH");
?
??IdCard ic = new IdCard();
??ic.setName("MLDN.GUEST");
??ic.setAge(25);
??
??
??ic.setPerson(per);
??per.setIdcard(ic);
??
??pgo.insert(per);
??pgo.insert(ic) ;
??
?}
}
