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 class="uuid.hex"></generator>
  </id>
  <property name="name" type="java.lang.String">
   <column name="name" length="20" not-null="true" />
  </property>
  <one-to-one name="idcard"
   class="org.onetoone4.com.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) ;
  
 }

}