一对一单向外键关联

(1)xml方法
Student.java

public class Student {
	private int id;
	private String name;
	private int age;
	private StuCard stuCard;
	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 StuCard getStuCard() {
		return stuCard;
	}

	public void setStuCard(StuCard stuCard) {
		this.stuCard = stuCard;
	}

}

StuCard.java

public class StuCard {
	private int stuNo;
	private String color;
	public int getStuNo() {
		return stuNo;
	}
	public void setStuNo(int stuNo) {
		this.stuNo = stuNo;
	}
	public String getColor() {
		return color;
	}
	public void setColor(String color) {
		this.color = color;
	}
	
}

Student.hbm.xml

<?xml version="1.0"?>
<!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.hibernate.model.Student" dynamic-update="true">
		<id name="id">
			<generator class="native">
			</generator>
		</id>
		
		<property name="name" />
		<property name="age" />
		<many-to-one name="stuCard" foreign-key="stu_card" unique="true" column="stuNo" />
    </class>
	
</hibernate-mapping>

StuCard.hbm.xml

<?xml version="1.0"?>
<!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.hibernate.model.StuCard">
		<id name="stuNo">
			<generator class="native"></generator>
		</id>
		
		<property name="color"/>
    </class>
	
</hibernate-mapping>

(2)annotation方法
Student.java

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

import javax.persistence.Id;
@Entity
public class Student {
	private int id;
	private String name;
	private int age;
	private StuCard stuCard;
	@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;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}
	@OneToOne
	public StuCard getStuCard() {
		return stuCard;
	}

	public void setStuCard(StuCard stuCard) {
		this.stuCard = stuCard;
	}

}

StuCard.java

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

@Entity
public class StuCard {
	private int stuNo;
	private String color;
	@Id
	@GeneratedValue
	public int getStuNo() {
		return stuNo;
	}
	public void setStuNo(int stuNo) {
		this.stuNo = stuNo;
	}
	public String getColor() {
		return color;
	}
	public void setColor(String color) {
		this.color = color;
	}
	
}

测试方法

import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;
import org.junit.Test;


public class TestAll {
	@Test
	public void OneToOne(){
		new SchemaExport(new Configuration().configure()).create(true, true);
	}
}

这个测试方法会在控制台生成创表信息,记得在hibernate.cfg.xml文件中添加映射信息