<?xml version="1.0" encoding="GBK"?>
<project name="hibernate" basedir="." default="">
<property name="src" value="src"/>
<property name="dest" value="classes"/>
<path >
<fileset dir="../../../lib">
<include name="**/*.jar"/>
</fileset>
<pathelement path="${dest}"/>
</path>
<target name="compile" description="Compile all source code">
<delete dir="${dest}"/>
<mkdir dir="${dest}"/>
<copy todir="${dest}">
<fileset dir="${src}">
<exclude name="**/*.java"/>
</fileset>
</copy>
<javac destdir="${dest}" debug="true" includeantruntime="yes"
deprecation="false" optimize="false" failonerror="true">
<src path="${src}"/>
<classpath ref/>
<compilerarg value="-Xlint:deprecation"/>
</javac>
</target>
<target name="run" description="Run the main class" depends="compile">
<java classname="lee.PersonManager" fork="yes" failonerror="true">
<classpath ref/>
</java>
</target>
</project>
<?xml version="1.0" encoding="GBK"?>
<!-- 指定Hibernate配置文件的DTD信息 -->
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<!-- hibernate-configuration是配置文件的根元素 -->
<hibernate-configuration>
<session-factory>
<!-- 指定连接数据库所用的驱动 -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<!-- 指定连接数据库的url,其中hibernate是本应用连接的数据库名 -->
<property name="connection.url">jdbc:mysql://localhost/hibernate</property>
<!-- 指定连接数据库的用户名 -->
<property name="connection.username">root</property>
<!-- 指定连接数据库的密码 -->
<property name="connection.password">32147</property>
<!-- 指定连接池里最大连接数 -->
<property name="hibernate.c3p0.max_size">20</property>
<!-- 指定连接池里最小连接数 -->
<property name="hibernate.c3p0.min_size">1</property>
<!-- 指定连接池里连接的超时时长 -->
<property name="hibernate.c3p0.timeout">5000</property>
<!-- 指定连接池里最大缓存多少个Statement对象 -->
<property name="hibernate.c3p0.max_statements">100</property>
<property name="hibernate.c3p0.idle_test_period">3000</property>
<property name="hibernate.c3p0.acquire_increment">2</property>
<property name="hibernate.c3p0.validate">true</property>
<!-- 指定数据库方言 -->
<property name="dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
<!-- 根据需要自动创建数据库 -->
<property name="hbm2ddl.auto">update</property>
<!-- 显示Hibernate持久化操作所生成的SQL -->
<property name="show_sql">true</property>
<!-- 将SQL脚本进行格式化后再输出 -->
<property name="hibernate.format_sql">true</property>
<!-- 罗列所有持久化类的类名 -->
<mapping class="org.crazyit.app.domain.Person"/>
<mapping class="org.crazyit.app.domain.Address"/>
</session-factory>
</hibernate-configuration>
package org.crazyit.app.domain;
import java.util.*;
import javax.persistence.*;
/**
* Description:
* <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
* <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
* <br/>This program is protected by copyright laws.
* <br/>Program Name:
* <br/>Date:
* @author Yeeku.H.Lee kongyeeku@163.com
* @version 1.0
*/
@Entity
@Table(name="address_inf")
public class Address
{
// 标识属性
@Id @Column(name="address_id")
@GeneratedValue(strategy=GenerationType.IDENTITY)
private int addressId;
// 定义地址详细信息的成员变量
private String addressDetail;
// 无参数的构造器
public Address()
{
}
// 初始化全部成员变量的构造器
public Address(String addressDetail)
{
this.addressDetail = addressDetail;
}
// addressId的setter和getter方法
public void setAddressId(int addressId)
{
this.addressId = addressId;
}
public int getAddressId()
{
return this.addressId;
}
// addressDetail的setter和getter方法
public void setAddressDetail(String addressDetail)
{
this.addressDetail = addressDetail;
}
public String getAddressDetail()
{
return this.addressDetail;
}
}
package org.crazyit.app.domain;
import java.util.*;
import javax.persistence.*;
/**
* Description:
* <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
* <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
* <br/>This program is protected by copyright laws.
* <br/>Program Name:
* <br/>Date:
* @author Yeeku.H.Lee kongyeeku@163.com
* @version 1.0
*/
@Entity
@Table(name="person_inf")
public class Person
{
// 标识属性
@Id @Column(name="person_id")
@GeneratedValue(strategy=GenerationType.IDENTITY)
private Integer id;
private String name;
private int age;
// 定义该Person实体关联的Address实体
@ManyToOne(targetEntity=Address.class)
// 显式使用@JoinTable映射连接表
@JoinTable(name="person_address", // 指定连接表的表名为person_address
// 指定连接表中person_id外键列,参照到当前实体对应表的主键列
joinColumns=@JoinColumn(name="person_id"
, referencedColumnName="person_id", unique=true),
// 指定连接表中address_id外键列,参照到当前实体的关联实体对应表的主键列
inverseJoinColumns=@JoinColumn(name="address_id"
, referencedColumnName="address_id")
)
private Address address;
// id的setter和getter方法
public void setId(Integer id)
{
this.id = id;
}
public Integer getId()
{
return this.id;
}
// name的setter和getter方法
public void setName(String name)
{
this.name = name;
}
public String getName()
{
return this.name;
}
// age的setter和getter方法
public void setAge(int age)
{
this.age = age;
}
public int getAge()
{
return this.age;
}
// address的setter和getter方法
public void setAddress(Address address)
{
this.address = address;
}
public Address getAddress()
{
return this.address;
}
}
package lee;
import org.hibernate.*;
import org.hibernate.cfg.*;
import org.hibernate.service.*;
import org.hibernate.boot.registry.*;
/**
* Description:
* <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
* <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
* <br/>This program is protected by copyright laws.
* <br/>Program Name:
* <br/>Date:
* @author Yeeku.H.Lee kongyeeku@163.com
* @version 1.0
*/
public class HibernateUtil
{
public static final SessionFactory sessionFactory;
static
{
try
{
// 使用默认的hibernate.cfg.xml配置文件创建Configuration实例
Configuration cfg = new Configuration()
.configure();
// 以Configuration实例来创建SessionFactory实例
ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
.applySettings(cfg.getProperties()).build();
sessionFactory = cfg.buildSessionFactory(serviceRegistry);
}
catch (Throwable ex)
{
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
// ThreadLocal可以隔离多个线程的数据共享,因此不再需要对线程同步
public static final ThreadLocal<Session> session
= new ThreadLocal<Session>();
public static Session currentSession()
throws HibernateException
{
Session s = session.get();
// 如果该线程还没有Session,则创建一个新的Session
if (s == null)
{
s = sessionFactory.openSession();
// 将获得的Session变量存储在ThreadLocal变量session里
session.set(s);
}
return s;
}
public static void closeSession()
throws HibernateException
{
Session s = session.get();
if (s != null)
s.close();
session.set(null);
}
}
package lee;
import org.hibernate.Transaction;
import org.hibernate.Session;
import java.util.Date;
import java.util.Set;
import java.util.HashSet;
import org.crazyit.app.domain.*;
/**
* Description:
* <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
* <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
* <br/>This program is protected by copyright laws.
* <br/>Program Name:
* <br/>Date:
* @author Yeeku.H.Lee kongyeeku@163.com
* @version 1.0
*/
public class PersonManager
{
public static void main(String[] args)
{
PersonManager mgr = new PersonManager();
mgr.testPerson();
HibernateUtil.sessionFactory.close();
}
private void testPerson()
{
Session session = HibernateUtil.currentSession();
Transaction tx = session.beginTransaction();
// 创建一个Person对象
Person p = new Person();
// 设置Person的name为crazyit字符串
p.setName("crazyit");
p.setAge(21);
// 创建一个瞬态的Address对象
Address a = new Address("广州天河");
// 设置Person和Address之间的关联关系
p.setAddress(a);
// 再持久化Address对象
session.persist(a);
// 创建一个瞬态的Address对象
Address a2 = new Address("上海虹口");
// 设置Person和Address之间的关联关系
p.setAddress(a2);
// 由于采用了连接表来维护N-1关联关系,因此不存在主从表关系,
// 程序可以随意控制先持久化哪个实体。
// 持久化Address对象
session.persist(a2);
// 持久化Person对象
session.save(p);
// 持久化Address对象
session.save(a);
tx.commit();
HibernateUtil.closeSession();
}
}