【Hibernate】---【注解】一对一

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-configuration PUBLIC ???????"-//Hibernate/Hibernate Configuration DTD 3.0//EN" ???????"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"><hibernate-configuration> ???<session-factory> ???????<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> ???????<property name="hibernate.connection.password">root</property> ???????<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/test</property> ???????<property name="hibernate.connection.username">root</property> ???????????????<property name="hibernate.show_sql">true</property> ???????<property name="hibernate.format_sql">true</property> ???????<property name="hibernate.hbm2ddl.auto">update</property> ???????<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> ???????????????<property name="current_session_context_class">thread</property> ???????<!-- ????????<mapping resource="com/chinasofti/entity/User.hbm.xml"/> ???????<mapping resource="com/chinasofti/entity/Role.hbm.xml"/> ????????--> ???????????????<mapping class="com.chinasofti.entity.Person"/> ???????<mapping class="com.chinasofti.entity.Card"/> ???????????</session-factory></hibernate-configuration>

package com.chinasofti.entity;import javax.persistence.CascadeType;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.GenerationType;import javax.persistence.Id;import javax.persistence.JoinColumn;import javax.persistence.OneToOne;import javax.persistence.Table;@Entity@Table(name="T_Person")public class Person { ???@Id ???@GeneratedValue(strategy=GenerationType.IDENTITY) ???private Integer pid; ???private String pname; ???@OneToOne(cascade=CascadeType.ALL,mappedBy="person") ???@JoinColumn(name="pid") ???private Card card; ???public Integer getPid() { ???????return pid; ???} ???public void setPid(Integer pid) { ???????this.pid = pid; ???} ???public String getPname() { ???????return pname; ???} ???public void setPname(String pname) { ???????this.pname = pname; ???} ???public Card getCard() { ???????return card; ???} ???public void setCard(Card card) { ???????this.card = card; ???} ???@Override ???public String toString() { ???????return "Person [pid=" + pid + ", pname=" + pname + ", card=" + card ???????????????+ "]"; ???} ???}

package com.chinasofti.entity;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.GenerationType;import javax.persistence.Id;import javax.persistence.JoinColumn;import javax.persistence.OneToOne;import javax.persistence.Table;@Entity@Table(name="T_Card")public class Card { ???@Id ???@GeneratedValue(strategy=GenerationType.IDENTITY) ???private Integer cid; ???private String cnum; ???????@OneToOne ???@JoinColumn(name="pid") ???private Person person; ???public Integer getCid() { ???????return cid; ???} ???public void setCid(Integer cid) { ???????this.cid = cid; ???} ???public String getCnum() { ???????return cnum; ???} ???public void setCnum(String cnum) { ???????this.cnum = cnum; ???} ???public Person getPerson() { ???????return person; ???} ???public void setPerson(Person person) { ???????this.person = person; ???} ???@Override ???public String toString() { ???????return "Card [cid=" + cid + ", cnum=" + cnum + ", person=" + person ???????????????+ "]"; ???}}

package com.chinasofti.entity;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.cfg.Configuration;public class HibernateUtil { ???static Configuration CONFIGURATION = null; ???static SessionFactory SESSION_FACTORY = null; ???static Session SESSION = null; ???static{ ???????CONFIGURATION = new Configuration(); ???????CONFIGURATION.configure(); ???????SESSION_FACTORY = CONFIGURATION.buildSessionFactory(); ???????SESSION ???= SESSION_FACTORY.openSession(); ???} ???public static SessionFactory getSessionFactory(){ ???????return SESSION_FACTORY; ???} ???public static Session openSession(){ ???????return SESSION; ???}}

package com.chinasofti.entity;import org.hibernate.Session;import org.hibernate.Transaction;import org.junit.Test;public class TestOneOne { ???@Test ???public void test1to1(){ ???????Session session = HibernateUtil.openSession(); ???????Transaction transaction = session.beginTransaction(); ???????Person person = session.get(Person.class, 1); ???????session.delete(person); ???????transaction.commit(); ???????session.close(); ???} ???}