JPA OneToOne映射

package com.jvwl.model;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToOne;
/**
 * Person实体
 * @author Jerval
 *
 */
@Entity
public class Person {
	private Integer id;
	private String name;
	private IDCard idCard;

	public Person() {
	}

	public Person(String name) {
		super();
		this.name = name;
	}

	@Id
	@GeneratedValue
	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	@Column(length = 10)
	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	@OneToOne(optional = false, cascade = CascadeType.ALL)
	@JoinColumn(name = "idCard_id")
	public IDCard getIdCard() {
		return idCard;
	}

	public void setIdCard(IDCard idCard) {
		this.idCard = idCard;
	}

}

 

package com.jvwl.model;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToOne;
/**
 * 身体证实体
 * @author Jerval
 *
 */
@Entity
public class IDCard {

	private Integer id;
	private String cardNo;
	private Person person;

	public IDCard() {
	}

	public IDCard(String cardNo) {
		super();
		this.cardNo = cardNo;
	}

	@Id
	@GeneratedValue
	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	@Column(nullable = false, length = 18)
	public String getCardNo() {
		return cardNo;
	}

	public void setCardNo(String cardNo) {
		this.cardNo = cardNo;
	}

	@OneToOne(mappedBy = "idCard", cascade = { CascadeType.REFRESH,
			CascadeType.PERSIST, CascadeType.MERGE })
	public Person getPerson() {
		return person;
	}

	public void setPerson(Person person) {
		this.person = person;
	}
}

 

Test:

package junit.test;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

import org.junit.Test;

import com.jvwl.model.IDCard;
import com.jvwl.model.Person;

public class JPATest {
@Test public void test(){
	EntityManagerFactory factory = Persistence.createEntityManagerFactory("jvwl");
	EntityManager em = factory.createEntityManager();
	em.getTransaction().begin();
	Person person = new Person("李菏");
	person.setIdCard(new IDCard("12212121"));
	em.persist(person);
	em.getTransaction().commit();
	em.close();
	factory.close();
}
}