[原]Hibernate集合映射

[标题]:[原]Hibernate集合映射
[时间]:2009-7-3
[摘要]:Hibernate中Set、List、Map、Array等集合的映射。
[关键字]:Hibernate，ORM，关联，集合，聚合，合成，composite，aggregation，持久化，映射，Abstract，List，Map，Array，Set，DAO，对象，Bag，组合，Bean，包含
[环境]:MyEclipse7，Hibernate3.2，MySQL5.1
[作者]:Winty ([e-mail]) http://www.blogjava.net/wintys

[正文]:

    Hibernate中包含关系的映射。包含关系包括聚合(Aggregation)、合成(Composite)关系。关联强度:合成>聚合>关联。

1、component映射
    component映射在面向对象概念中是合成关系。
实体类:
public class Person {
    ......
    private Name name;
    ......
}

public class Name {
    private String firstName;
    private String lastName;
    ......
}

配置文件:
<component name="name" class="wintys.hibernate.collection.entity.Name">
    <property name="firstName" />
    <property name="lastName" />
</component>

数据库表:
    实体类没有单独映射为一个表，而是直接存于Person类对应的表中。
CREATE TABLE Person(
    ......
    firstName VARCHAR(50),
    lastName VARCHAR(50),
    ......
);

2、集合映射
    Set、List、Map、Array等集合分别对应着java.util.Set、java.util.List、java.util.Map、数组。在持久化时，集合中的元素通过<element>或<composite-element>映射。

    (1)、<element>对应Java中的基本数据类型(int、float等)，还包括String。
实体类:
public class Person {
    ......
    private Set<String> addresses;//集合里放的是String，所以用<element>映射
    ......
}

配置:(<key>表示PersonAddress的外键)
<set name="addresses" table="PersonAddress">
    <key column="person_id" not-null="true"/>
    <element column="addr" type="string" />
</set>

数据库表:
CREATE TABLE Person(
    id INT(4) NOT NULL,
    ......
);
CREATE TABLE PersonAddress(
    ......
    addr VARCHAR(200),
    person_id INT(4), -- 外键
    ......
);

    (2)、<composite-element>对应复合类型(用户自定义类型)。
实体类:
public class Person {
    ......
    private Set<Email> emails;
    ......
}

public class Email {
    private String userName;
    private String hostName;
    ......
}

配置文件:
<set name="emails" table="PersonEmail">
    <key column="person_id" not-null="true"/>
    <composite-element class="wintys.hibernate.collection.entity.Email">
        <property name="userName" />
        <property name="hostName" />
    </composite-element>
</set>

数据库表:
CREATE TABLE PersonEmail(
    ......
    userName VARCHAR(100),
    hostName VARCHAR(100),
    person_id INT(4),
    ......
);


    (3)、Set集合直接使用<set>标签进行映射，而List、Map、Array集合则需要在<list>、<map>、<array>中添加索引字段用于标明位置或key，当然在数据库中也要相应添加索引字段。
<list name="friends" table="PersonFriend">
    <key column="person_id" not-null="true"/>
    <index column="indexKey" />
    <composite-element class="wintys.hibernate.collection.entity.Friend">
        <property name="name" />
        <property name="description" column="theDescription"/>
    </composite-element>
</list>

<!-- map -->
<map name="relatives" table="PersonRelative">
    <key column="person_id" not-null="true"/>
    <index column="indexKey" type="string"/>
    <composite-element class="wintys.hibernate.collection.entity.Relative">
        <property name="name" />
        <property name="description" column="theDescription"/>
    </composite-element>
</map>

<!-- array -->
<array name="hobbies" table="PersonHobby">
    <key column="person_id" not-null="true" />
    <index column="indexKey"/>
    <element column="value" type="string" />
</array>

    总之，首先选择集合(如Set)，再在集合映射中配置集合中到底存放的是什么类型的元素(如<element>)。

3、详细实例
    (1)、实体类

 
【图:entity.jpg】

/src/wintys/hibernate/collection/entity/Person.java:

package wintys.hibernate.collection.entity;

import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * Person
 * @version 2009-07-03
 * @author Winty ([e-mail]) http://wintys.blogjava.net
 *  
 */
public class Person {
    private int id;
    private int age;
    private Name name;//Person与Name是包含关系
    private Set<String> addresses;
    private Set<Email> emails;
    private List<Friend> friends;
    private Map<String , Relative> relatives;
    private String[] hobbies;
    
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public Name getName() {
        return name;
    }
    public void setName(Name name) {
        this.name = name;
    }
    public Set<String> getAddresses() {
        return addresses;
    }
    public void setAddresses(Set<String> addresses) {
        this.addresses = addresses;
    }
    public Set<Email> getEmails() {
        return emails;
    }
    public void setEmails(Set<Email> emails) {
        this.emails = emails;
    }
    public List<Friend> getFriends() {
        return friends;
    }
    public void setFriends(List<Friend> friends) {
        this.friends = friends;
    }
    public Map<String, Relative> getRelatives() {
        return relatives;
    }
    public void setRelatives(Map<String, Relative> relatives) {
        this.relatives = relatives;
    }
    public String[] getHobbies() {
        return hobbies;
    }
    public void setHobbies(String[] hobbies) {
        this.hobbies = hobbies;
    }
}

/src/wintys/hibernate/collection/entity/Name.java:

package wintys.hibernate.collection.entity;

/**
 * 姓名
 * @version 2009-07-03
 * @author Winty ([e-mail])
 *
 */
public class Name {
    private String firstName;
    private String lastName;
    
    public Name(){
    }
    
    public Name(String firstName , String lastName){
        this.firstName = firstName;
        this.lastName = lastName;
    }
    
    public String getFirstName() {
        return firstName;
    }
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
    public String getLastName() {
        return lastName;
    }
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
}

/src/wintys/hibernate/collection/entity/Email.java:

package wintys.hibernate.collection.entity;

/**
 * Email
 * e-mail格式:userName@hostName
 * @version 2009-07-03
 * @author Winty ([e-mail])
 *
 */
public class Email {
    private String userName;
    private String hostName;
    
    public Email(){
    }
    
    public Email(String userName , String hostName){
        this.userName = userName;
        this.hostName = hostName;
    }
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public String getHostName() {
        return hostName;
    }
    public void setHostName(String hostName) {
        this.hostName = hostName;
    }
}

/src/wintys/hibernate/collection/entity/Friend.java:

package wintys.hibernate.collection.entity;

/**
 * 朋友
 * @version 2009-07-03
 * @author Winty ([e-mail])
 *
 */
public class Friend {
    private String name;
    private String description;
    
    public Friend(){        
    }
    
    public Friend(String name , String description){
        this.name = name;
        this.description = description;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getDescription() {
        return description;
    }
    public void setDescription(String description) {
        this.description = description;
    }
}

/src/wintys/hibernate/collection/entity/Relative.java:

package wintys.hibernate.collection.entity;

/**
 * 亲戚
 * @version 2009-07-03
 * @author Winty ([e-mail]) http://wintys.blogjava.net
 *
 */
public class Relative {
    private String name;
    private String description;
    
    public Relative(){
        
    }
    
    public Relative(String name , String description){
        this.name = name;
        this.description = description;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getDescription() {
        return description;
    }
    public void setDescription(String description) {
        this.description = description;
    }

}

    (2)数据库表:

 
【图:db1.jpg】

 
【图:db2.jpg】

-- author Winty ([e-mail]) http://wintys.blogjava.net
-- 2009-07-03
USE db;

-- 先删除先前存在的表
DROP TABLE IF EXISTS PersonAddress;
DROP TABLE IF EXISTS PersonEmail;
DROP TABLE IF EXISTS PersonFriend;
DROP TABLE IF EXISTS PersonRelative;
DROP TABLE IF EXISTS PersonHobby;
DROP TABLE IF EXISTS Person;

CREATE TABLE Person(
    id INT(4) NOT NULL,
    age INT(4),
    firstName VARCHAR(50),-- Name:firstName
    lastName VARCHAR(50), -- Name:lastName
    
    PRIMARY KEY(id)
);

CREATE TABLE PersonAddress(
    id INT(4) AUTO_INCREMENT,
    addr VARCHAR(200),
    person_id INT(4), -- 外键
    
    PRIMARY KEY(id),
    CONSTRAINT FK_person_address FOREIGN KEY(person_id) REFERENCES Person(id)
);

CREATE TABLE PersonEmail(
    id INT(4) AUTO_INCREMENT,
    userName VARCHAR(100),-- email(userName@hostName) user
    hostName VARCHAR(100),-- email(userName@hostName) host
    person_id INT(4),
    
    PRIMARY KEY(id),
    CONSTRAINT FK_person_email FOREIGN KEY(person_id) REFERENCES Person(id)
);

CREATE TABLE PersonFriend(
    id INT(4) AUTO_INCREMENT,
    indexKey INT(4), -- List索引
    name VARCHAR(50),-- friend name
    theDescription VARCHAR(100),-- friend description
    person_id INT(4),
    
    PRIMARY KEY(id),
    CONSTRAINT FK_person_friend FOREIGN KEY(person_id) REFERENCES Person(id)
);

-- 亲戚
CREATE TABLE PersonRelative(
    id INT(4) AUTO_INCREMENT,
    indexKey VARCHAR(50),-- Map Key
    name VARCHAR(50),-- relative's name
    theDescription VARCHAR(100),-- relative's description
    person_id INT(4),
    
    PRIMARY KEY(id),
    CONSTRAINT FK_person_relative FOREIGN KEY(person_id) REFERENCES Person(id)
);

-- 爱好
CREATE TABLE PersonHobby(
    id INT(4) AUTO_INCREMENT,
    indexKey INT(4),-- Array index
    value VARCHAR(100),
    person_id INT(4),

    PRIMARY KEY(id),
    CONSTRAINT FK_person_hobby FOREIGN KEY(person_id) REFERENCES Person(id)
);

(3)、配置文件
/src/wintys/hibernate/collection/entity/Person.hbm.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
    Mapping file autogenerated by MyEclipse Persistence Tools
    E-mail: [e-mail]
    Blog: http://wintys.blogjava.net
-->

<hibernate-mapping>
    <class name="wintys.hibernate.collection.entity.Person" table="Person" catalog="db">
        <id name="id" type="java.lang.Integer">
            <column name="id" />
            <generator class="increment"/>
        </id>
        <property name="age" type="java.lang.Integer" />
        
        <!-- 包含关系映射 -->
        <component name="name" class="wintys.hibernate.collection.entity.Name">
            <property name="firstName" />
            <property name="lastName" />
        </component>
        
        <!-- element -->
        <set name="addresses" table="PersonAddress">
            <key column="person_id" not-null="true"/>
            <element column="addr" type="string" />
        </set>
        
        <!-- composite-element -->
        <set name="emails" table="PersonEmail">
            <key column="person_id" not-null="true"/>
            <composite-element class="wintys.hibernate.collection.entity.Email">
                <property name="userName" />
                <property name="hostName" />
            </composite-element>
        </set>
        
        <!-- list -->
        <list name="friends" table="PersonFriend">
            <key column="person_id" not-null="true"/>
            <index column="indexKey" />
            <composite-element class="wintys.hibernate.collection.entity.Friend">
                <property name="name" />
                <property name="description" column="theDescription"/>
            </composite-element>
        </list>
        
        <!-- map -->
        <map name="relatives" table="PersonRelative">
            <key column="person_id" not-null="true"/>
            <index column="indexKey" type="string"/>
            <composite-element class="wintys.hibernate.collection.entity.Relative">
                <property name="name" />
                <property name="description" column="theDescription"/>
            </composite-element>
        </map>
        
        <!-- array -->
        <array name="hobbies" table="PersonHobby">
            <key column="person_id" not-null="true" />
            <index column="indexKey"/>
            <element column="value" type="string" />
        </array>
    </class>
</hibernate-mapping>

/src/hibernate.cfg.xml:

<?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">

<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>

<session-factory>
    <property name="connection.username">root</property>
    <property name="connection.url">
        jdbc:mysql://localhost:3306/db?useUnicode=true&amp;characterEncoding=utf-8
    </property>
    <property name="dialect">
        org.hibernate.dialect.MySQLDialect
    </property>
    <property name="myeclipse.connection.profile">MySQLDriver</property>
    <property name="connection.password">root</property>
    <property name="connection.driver_class">
        com.mysql.jdbc.Driver
    </property>
    <property name="show_sql">true</property>
    <mapping resource="wintys/hibernate/collection/entity/Person.hbm.xml" />

</session-factory>

</hibernate-configuration>

4、测试
/src/wintys/hibernate/collection/dao/DAO.java:

package wintys.hibernate.collection.dao;

import java.util.List;
import org.hibernate.HibernateException;

import wintys.hibernate.collection.entity.Person;

public interface DAO {
    public List<Person> doSelect(String selectHQL)throws HibernateException;
    
    public boolean doInsert()throws HibernateException;
    
    public boolean doDelete(Integer personId)throws HibernateException;
}

/src/wintys/hibernate/collection/dao/PersonDAO.java

package wintys.hibernate.collection.dao;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.hibernate.Hibernate;
import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;

import wintys.hibernate.collection.entity.Email;
import wintys.hibernate.collection.entity.Friend;
import wintys.hibernate.collection.entity.Name;
import wintys.hibernate.collection.entity.Person;
import wintys.hibernate.collection.entity.Relative;

public class PersonDAO implements DAO {

    @Override
    public boolean doInsert() throws HibernateException {
        Person person = new Person();
        person.setAge(38);
        person.setName(new Name("Bill" , "Gates"));
        
        Set<String> addresses = new HashSet<String>();
        addresses.add("New York USA");
        addresses.add("中国 上海");
        person.setAddresses(addresses);
        
        Set<Email> emails = new HashSet<Email>();
        emails.add(new Email("wintys" , "gmail.com"));
        emails.add(new Email("abc" , "samplehost.com"));
        emails.add(new Email("xyz" , "samplehost.com"));
        person.setEmails(emails);
        
        List<Friend> friends = new LinkedList<Friend>();
        friends.add(new Friend("Jim" , "Best Friend."));
        friends.add(new Friend("Smith" , "Classmate."));
        person.setFriends(friends);
        
        Map<String , Relative> relatives = new HashMap<String , Relative>();
        relatives.put("uncle", new Relative("Sam" , "a lazy guy."));
        relatives.put("brother", new Relative("Jimy" , "a good boy."));
        person.setRelatives(relatives);
        
        String[] hobbies = new String[3];
        hobbies[0] = "Music";
        hobbies[1] = "Classic Opera";
        hobbies[2] = "Swimming";
        person.setHobbies(hobbies);
        
        Session session = null;
        Transaction tc = null;
        try{
            session = HibernateUtil.getSession();
            tc = session.beginTransaction();
            session.save(person);
            tc.commit();
        }catch(HibernateException e){
            try{
                if(tc != null){
                    tc.rollback();
                }
            }catch(Exception ex){
                System.err.println("Err:" + ex.getMessage());
            }
            System.err.println("Err:" + e.getMessage());
            return false;
        }finally{
            HibernateUtil.closeSession();
        }
        
        return true;
    }

    @SuppressWarnings("unchecked")
    @Override
    public List<Person> doSelect(String selectHQL) throws HibernateException {
        Session session = null;
        List<Person> list = null;
        
        try{
            session= HibernateUtil.getSession();
            Query query = session.createQuery(selectHQL);
            list = query.list();
        }catch(HibernateException e){
            list = null;
            System.err.println(e.getMessage());
        }finally{
            //因为要使用延迟加载，所以注释掉
            //HibernateUtil.closeSession();
        }        
        
        return list;
    }

    @Override
    public boolean doDelete(Integer personId) throws HibernateException {
        Session session = null;
        Transaction tc = null;
        try{
            session = HibernateUtil.getSession();
            tc = session.beginTransaction();
            
            Person person = (Person)session.load(Person.class, personId);
            session.delete(person);
            
            tc.commit();
        }catch(HibernateException e){
            if(tc != null){
                tc.rollback();
            }
            System.err.println("删除失败:" + e.getMessage());
            return false;
        }finally{
            HibernateUtil.closeSession();
        }
        
        return true;
    }
}

/src/wintys/hibernate/collection/dao/HibernateUtil.java:

package wintys.hibernate.collection.dao;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

/**
 * 创建全局SessionFactory，通过ThreadLocal为每个线程提供不同的session
 * @version 2009-05-20
 * @author Winty
 */
public class HibernateUtil {
    private static final SessionFactory sessionFactory;
    private static final ThreadLocal<Session> threadLocal;
    
    static{
        try{
            sessionFactory = new Configuration()
                            .configure()
                            .buildSessionFactory();
        }catch(HibernateException e){
            throw new ExceptionInInitializerError(e);
        }
        
        threadLocal = new ThreadLocal<Session>();
    }
    
    /**
     * 获取session
     * @return the current session
     */
    public static Session getSession(){
        Session session = threadLocal.get();
        if(session == null){
            session = sessionFactory.openSession();
            threadLocal.set(session);
        }
        return session;        
    }
    
    /**
     * 关闭当前session
     */
    public static void closeSession(){
        Session session = threadLocal.get();
        if(session != null){
            session.close();
        }
        threadLocal.set(null);
    }
}

/src/wintys/hibernate/collection/Test.java

package wintys.hibernate.collection;

import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import wintys.hibernate.collection.dao.DAO;
import wintys.hibernate.collection.dao.PersonDAO;
import wintys.hibernate.collection.entity.Email;
import wintys.hibernate.collection.entity.Friend;
import wintys.hibernate.collection.entity.Name;
import wintys.hibernate.collection.entity.Person;
import wintys.hibernate.collection.entity.Relative;
/**
 * Hibernate集合映射
 * component、set、list、map、array
 * @version 2009-07-03
 * @author Winty ([e-mail]) http://wintys.blogjava.net
 *
 */
public class Test {
    public static void main(String[] args){
        DAO dao = new PersonDAO();
        dao.doInsert();
        
        //dao.doDelete(1);//级联删除
        
        List<Person> persons = dao.doSelect("from Person");
        printPerson(persons);        
    }
    
    public static void printPerson(List<Person> persons){
        Iterator<Person> it = persons.iterator();
        while(it.hasNext()){
            Person person = it.next();
            int id = person.getId();
            int age = person.getAge();
            Name name = person.getName();
            Set<String> addresses = person.getAddresses();
            Set<Email> emails = person.getEmails();
            List<Friend> friends = person.getFriends();
            Map<String , Relative> relatives = person.getRelatives();
            String[] hobbies = person.getHobbies();
            
            System.out.println("id:" + id);
            System.out.println("age:" + age);
            printName(name);
            printAddress(addresses);
            printEmail(emails);
            printFriend(friends);
            printRelative(relatives);
            printHobby(hobbies);
        }        
    }
    
    public static void printName(Name name){
        System.out.print("firstName:" +name.getFirstName());
        System.out.println("  lastName:" + name.getLastName());
    }
    
    public static void printAddress(Set<String> addresses){
        Iterator<String> it = addresses.iterator();
        while(it.hasNext()){
            System.out.println("  addr:" + it.next());    
        }    
    }
    
    public static void printEmail(Set<Email> emails){
        Iterator<Email> it = emails.iterator();
        while(it.hasNext()){
            Email email = it.next();
            System.out.println("  email:" + email.getUserName() + "@" + email.getHostName());    
        }    
    }
    
    public static void printFriend(List<Friend> friends){
        Iterator<Friend> it = friends.iterator();
        while(it.hasNext()){
            Friend friend = it.next();
            System.out.println("  friend:" + friend.getName() + "," + friend.getDescription());    
        }    
    }
    
    public static void printRelative(Map<String , Relative> relatives){
        Set<String> keys = relatives.keySet();
        Iterator<String> it = keys.iterator();
        while(it.hasNext()){
            String key = it.next();
            Relative rt = relatives.get(key);
            
            String name = rt.getName();
            String desc = rt.getDescription();
            
            System.out.println("  relative:" + key + ":" + name + "," + desc);    
        }    
    }
    
    public static void printHobby(String[] hobbies){
        for(String hobby : hobbies){
            System.out.println("  hobby:" + hobby);
        }
    }
}

5、运行结果

 
【图:db1_result.jpg】

 
【图:db2_result.jpg】

Hibernate: select max(id) from Person
Hibernate: insert into db.Person (age, firstName, lastName, id) values (?, ?, ?, ?)
Hibernate: insert into PersonAddress (person_id, addr) values (?, ?)
Hibernate: insert into PersonAddress (person_id, addr) values (?, ?)
Hibernate: insert into PersonEmail (person_id, userName, hostName) values (?, ?, ?)
Hibernate: insert into PersonEmail (person_id, userName, hostName) values (?, ?, ?)
Hibernate: insert into PersonEmail (person_id, userName, hostName) values (?, ?, ?)
Hibernate: insert into PersonFriend (person_id, indexKey, name, theDescription) values (?, ?, ?, ?)
Hibernate: insert into PersonFriend (person_id, indexKey, name, theDescription) values (?, ?, ?, ?)
Hibernate: insert into PersonRelative (person_id, indexKey, name, theDescription) values (?, ?, ?, ?)
Hibernate: insert into PersonRelative (person_id, indexKey, name, theDescription) values (?, ?, ?, ?)
Hibernate: insert into PersonHobby (person_id, indexKey, value) values (?, ?, ?)
Hibernate: insert into PersonHobby (person_id, indexKey, value) values (?, ?, ?)
Hibernate: insert into PersonHobby (person_id, indexKey, value) values (?, ?, ?)
Hibernate: select person0_.id as id0_, person0_.age as age0_, person0_.firstName as firstName0_, person0_.lastName as lastName0_ from db.Person person0_
Hibernate: select hobbies0_.person_id as person1_0_, hobbies0_.value as value0_, hobbies0_.indexKey as indexKey0_ from PersonHobby hobbies0_ where hobbies0_.person_id=?
id:1
age:38
firstName:Bill  lastName:Gates
Hibernate: select addresses0_.person_id as person1_0_, addresses0_.addr as addr0_ from PersonAddress addresses0_ where addresses0_.person_id=?
  addr:New York USA
  addr:中国 上海
Hibernate: select emails0_.person_id as person1_0_, emails0_.userName as userName0_, emails0_.hostName as hostName0_ from PersonEmail emails0_ where emails0_.person_id=?
  email:[e-mail]
  email:[e-mail]
  email:[e-mail]
Hibernate: select friends0_.person_id as person1_0_, friends0_.name as name0_, friends0_.theDescription as theDescr3_0_, friends0_.indexKey as indexKey0_ from PersonFriend friends0_ where friends0_.person_id=?
  friend:Jim,Best Friend.
  friend:Smith,Classmate.
Hibernate: select relatives0_.person_id as person1_0_, relatives0_.name as name0_, relatives0_.theDescription as theDescr3_0_, relatives0_.indexKey as indexKey0_ from PersonRelative relatives0_ where relatives0_.person_id=?
  relative:brother:Jimy,a good boy.
  relative:uncle:Sam,a lazy guy.
  hobby:Music
  hobby:Classic Opera
  hobby:Swimming

[参考资料]:
《J2EE项目实训 - Hibernate框架技术》: 清华大学出版社

[附件]:
源代码:wintys_hibernate_collection.zip

原创作品，转载请注明出处。
作者:Winty ([e-mail])
博客:http://www.blogjava.net/wintys