hibernate集合映射

<!-----------------------------建立組件類Friends.java-------------------------------------->

package com.michael.model;

import java.util.ArrayList;

import java.util.List;

public class Friends {

private String sex;

private String f_name;

private List<String> cars = newArrayList<String>();

private Person person;

public Friends() {

}

public Friends(String f_name, String sex) {

this.f_name = f_name;

this.sex = sex;

}

public List<String> getCars(){

return cars;

}

public void setCars(List<String>cars) {

this.cars = cars;

}

public Person getPerson() {

return person;

}

public void setPerson(Person person) {

this.person = person;

}

public String getSex() {

return sex;

}

public void setSex(String sex) {

this.sex = sex;

}

public String getF_name() {

return f_name;

}

public void setF_name(String fName) {

f_name = fName;

}

@Override

public boolean equals(Object obj) {

if (this == obj) {

return true;

}

if (obj != null &&obj.getClass() == Friends.class) {

Friends target = (Friends) obj;

if (target.getF_name().equals(getF_name())) {

return true;

}

}

return false;

}

@Override

public int hashCode() {

return getF_name().hashCode() * 13 +getSex().hashCode();

}

}

<!-------------------------------建立一個持久化類Person.java-------------------------------->

package com.michael.model;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.HashSet;

import java.util.List;

import java.util.Map;

import java.util.Set;

// default package

public class Person {

private String name;

private int age;

private int id;

//list集合

private List<String> schools =new ArrayList<String>();

//set集合

private Set<String> animas = newHashSet<String>();

//map集合

private Map<String, Integer>course = new HashMap<String,Integer>();

//map集合的屬性爲組件

private Map<String, Friends>friends = new HashMap<String,Friends>();

//組件爲map集合的索引

private Map<Friends, Integer>friends2 = new HashMap<Friends,Integer>();

//組件屬性爲集合

private Friends friends1;

public Friends getFriends1() {

return friends1;

}

public void setFriends1(Friends friends1) {

this.friends1 = friends1;

}

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 List<String> getSchools(){

return schools;

}

public voidsetSchools(List<String> schools){

this.schools = schools;

}

public Set<String> getAnimas(){

return animas;

}

public voidsetAnimas(Set<String> animas) {

this.animas = animas;

}

public Map<String, Integer>getCourse() {

return course;

}

public void setCourse(Map<String,Integer> course) {

this.course = course;

}

public Map<String, Friends>getFriends() {

return friends;

}

public void setFriends(Map<String,Friends> friends) {

this.friends = friends;

}

public Map<Friends, Integer>getFriends2() {

return friends2;

}

public void setFriends2(Map<Friends,Integer> friends2) {

this.friends2 = friends2;

}

}

<!----------------------------建立持久化類對應的映射文件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 fileautogenerated by MyEclipse Persistence Tools

-->

<hibernate-mapping>

<class name="com.michael.model.Person"table="person">

 

 <id name="id"type="java.lang.Integer">

 <columnname="id"></column>

 <generatorclass="identity"></generator>

 </id>

 

    <property name="name"type="java.lang.String">

          <column name="name" />

       </property>

       <property name="age"type="java.lang.Integer">

          <column name="age" />

       </property>

       

       <!-- list集合映射-->

      <list name="schools"table="school">

      <key column="personid"not-null="true"></key>

      <list-indexcolumn="list_order"></list-index>

      <element type="string"column="school_name"></element>

      </list>

      

      <!-- 因爲set是無序集合，所以無需配置list-index-->

      <set name="animas"table="animas">

      <keycolumn="person_animas_id"></key>

      <element type="string"column="animas_name"></element>

      </set>

      

      <!-- map集合映射 要配置map-key-->

      <map name="course" table="course">

      <keycolumn="person_course_id"></key>

      <map-key type="string"column="course_name"></map-key>

      <element type="int"column="score"></element>

      </map>

       

       <!-- map集合的屬性爲組件 -->

       <map name="friends"table="friends">

       <keycolumn="person_friends_id"></key>

       <map-key type="string"column="friend_name"></map-key>

       <composite-elementclass="com.michael.model.Friends">

       <parentname="person"/>

       <property name="f_name"></property>

       <property name="sex"></property>

      </composite-element>

       </map>

 <!-- 組件作爲Map的索引 必須得重寫組件類的equals()和hashCode()-->

       <map name="friends2"table="frindes2">

       <keycolumn="person_friends2_id"></key>

       <composite-map-keyclass="com.michael.model.Friends">

       <key-propertyname="f_name"></key-property>

       <key-propertyname="sex"></key-property>

      </composite-map-key>

       <element type="int"column="num"></element>

       </map>

       

       <!-- 組件屬性爲集合-->

       <component name="friends1"class="com.michael.model.Friends">

       <parentname="person"/>

       <propertyname="f_name"></property>

       <propertyname="sex"></property>

       <list name="cars"table="cars">

       <keycolumn="person_cars_id"></key>

       <list-indexcolumn="list_order"></list-index>

       <element type="string"column="car_name" />

       </list>

       </component>

    </class>

</hibernate-mapping>

<!------------------建立一個junit測試--------------------------------->

package com.michael.test;

import junit.framework.TestCase;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.HashSet;

import java.util.List;

import java.util.Map;

import java.util.Set;

import org.hibernate.Session;

import org.hibernate.Transaction;

import com.michael.HibernateSessionFactory;

import com.michael.model.Friends;

import com.michael.model.Person;

public class Test extends TestCase {

public void testOrm(){

Session session = HibernateSessionFactory.getSession();

//映射list集合

List<String> schools = newArrayList<String>();

schools.add("1");

schools.add("2");

schools.add("3");

//映射set集合

Set<String> animas = newHashSet<String>();

animas.add("3");

animas.add("3q");

animas.add("3e");

//映射map集合

Map<String,Integer> course = newHashMap<String,Integer>();

course.put("a", 80);

course.put("b", 90);

course.put("c", 85);

//組件屬性爲集合

List<String> cars = newArrayList<String>();

cars.add("bmw");

cars.add("奔馳");

//map集合屬性爲組件

Friends f = new Friends();

f.setF_name("AA");

f.setSex("男");

f.setCars(cars);

Map<String,Friends> maps = newHashMap<String,Friends>();

maps.put("1", f);

//組件爲map集合的索引

Map<Friends,Integer> maps2 = newHashMap<Friends, Integer>();

maps2.put(f, 45);

Person p  = new Person();

p.setSchools(schools);

p.setAnimas(animas);

p.setCourse(course);

p.setFriends1(f);

p.setFriends(maps);

p.setFriends2(maps2);

Transaction tr = session.beginTransaction();

tr.begin();

session.save(p);

tr.commit();

HibernateSessionFactory.closeSession();

}

}

運行junit測試，如果成功，那麼在各個數據庫表中都會有對應的數據插入。