双向一对一关联

Annotation方法

 

Tables structure

'CREATE TABLE `address` (
  `addressID` int(11) NOT NULL,
  `addressName` varchar(45) NOT NULL,
  PRIMARY KEY (`addressID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8'

 

'CREATE TABLE `person` (
  `id` int(11) NOT NULL,
  `name` varchar(45) NOT NULL,
  `addressID` varchar(45) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8'

 

Person类

 

package hibernate.entities;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToOne;

@Entity
public class Person {
	private int id;
	private String name;
	private Address address;
	
	@Id
	@GeneratedValue
	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;
	}
	
	@OneToOne
	@JoinColumn(name="addressID")
	public Address getAddress() {
		return address;
	}
	public void setAddress(Address address) {
		this.address = address;
	}
}

 

 

Address类

 

package hibernate.entities;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToOne;

@Entity
public class Address {
	private int addressID;
	private String addressName;
	private Person person;
	
	@Id
	@GeneratedValue
	public int getAddressID() {
		return addressID;
	}
	public void setAddressID(int addressID) {
		this.addressID = addressID;
	}
	public String getAddressName() {
		return addressName;
	}
	public void setAddressName(String addressName) {
		this.addressName = addressName;
	}
	
	@OneToOne(mappedBy="address")
	public Person getPerson() {
		return person;
	}
	public void setPerson(Person person) {
		this.person = person;
	}
	
	
}

 

 

 

XML配置方法

 husband表

'CREATE TABLE `husband` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(45) NOT NULL,
  `wifeID` int(11) NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `id_UNIQUE` (`id`),
  KEY `FK_7hkddxc8rvd25jlebv327ewj8` (`wifeID`),
  CONSTRAINT `FK_7hkddxc8rvd25jlebv327ewj8` FOREIGN KEY (`wifeID`) REFERENCES `wife` (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8'

 

wife表

'CREATE TABLE `wife` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8'

 

 

Husband类

package hibernate.entities;

public class Husband {
	private int id;
	private String name;
	private Wife wife;
	
	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 Wife getWife() {
		return wife;
	}
	public void setWife(Wife wife) {
		this.wife = wife;
	}
	
	
}

 

Wife类

package hibernate.entities;

public class Wife {
	private int id;
	private String name;
	
	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;
	}
	
	
}

 

 

Husband.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="hibernate.entities">
    <class name="Husband" table="husband">
       <id name="id" column="id">
       	<generator class="native"></generator>
       </id>
       
       <property name="name"></property>
       
       <many-to-one name="wife" column="wifeID" unique="true"></many-to-one>
    </class>
</hibernate-mapping>

 

Wife.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="hibernate.entities">
    <class name="Wife" table="wife">
       <id name="id" column="id">
       	<generator class="native"></generator>
       </id>
       
       <property name="name" column="name"/>
       
       <one-to-one name="husband" property-ref="wife"></one-to-one>
       
    </class>
</hibernate-mapping>