hibernate map映射

Person.java

package com.aabnn.vo;

import java.util.HashMap;
import java.util.Map;

public class Person {
	private int id;
	private String name;
	private Map<String,Double> scores=new HashMap<String,Double>();
	public Person(){
		
	}
	public Person(String name,Map<String,Double> scores){
		this.name=name;
		this.scores=scores;
	}
	public int getId() {
		return id;
	}
	@SuppressWarnings(value="unused")
	private void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Map<String, Double> getScores() {
		return scores;
	}
	public void setScores(Map<String, Double> scores) {
		this.scores = scores;
	}
	
}

 

Person.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
	"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
	"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.aabnn.vo">
  <class name="Person" table="person">
  	<id name="id" type="integer" column="id" >
  		<generator class="identity" />
  	</id>
  	<property name="name" type="string" column="name" />
  	<map name="scores" table="scores">
  		<key column="id" />
  		<map-key type="string" column="course" />
  		<element type="double" column="grade" />
  	</map>
  </class>
</hibernate-mapping>

 

Test.java

package com.aabnn.test;

import java.util.HashMap;
import java.util.Map;

import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.classic.Session;

import com.aabnn.vo.Person;

public class Test {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		SessionFactory sf=new Configuration().configure().buildSessionFactory();
		Session sess=sf.openSession();
		Transaction tx=sess.beginTransaction();
		Map<String,Double> scores=new HashMap<String,Double>();
		scores.put("math", 80.00);
		scores.put("chinese", 90.00);
		scores.put("art", 98.00);
		Person p=new Person("xiaoxiao",scores);
		sess.save(p);
		tx.commit();
		sess.close();
	}

}

 

mysql 数据库

-- Create schema collectionmapping
--

CREATE DATABASE IF NOT EXISTS collectionmapping;
USE collectionmapping;

--
-- Definition of table `person`
--

DROP TABLE IF EXISTS `person`;
CREATE TABLE `person` (
  `id` int(10) unsigned NOT NULL auto_increment,
  `name` varchar(45) default NULL,
  PRIMARY KEY  (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;

--
-- Dumping data for table `person`
--

/*!40000 ALTER TABLE `person` DISABLE KEYS */;
INSERT INTO `person` (`id`,`name`) VALUES 
 (1,'xiaoxiao'),
 (2,'xiaoxiao'),
 (3,'xiaoxiao'),
 (4,'xiaoxiao');
/*!40000 ALTER TABLE `person` ENABLE KEYS */;


--
-- Definition of table `scores`
--

DROP TABLE IF EXISTS `scores`;
CREATE TABLE `scores` (
  `id` int(10) unsigned NOT NULL,
  `course` varchar(45) NOT NULL default '',
  `grade` double default NULL,
  PRIMARY KEY  (`id`,`course`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

--
-- Dumping data for table `scores`
--

/*!40000 ALTER TABLE `scores` DISABLE KEYS */;
INSERT INTO `scores` (`id`,`course`,`grade`) VALUES 
 (1,'art',98),
 (1,'chinese',90),
 (1,'math',80),
 (2,'art',98),
 (2,'chinese',90),
 (2,'math',80),
 (3,'art',98),
 (3,'chinese',90),
 (3,'math',80),
 (4,'art',98),
 (4,'chinese',90),
 (4,'math',80);
/*!40000 ALTER TABLE `scores` ENABLE KEYS */;

 

 

map映射到class

<map name="images" table="IMAGES" lazy="true" order-by="IMAGE_NAME asc">
			<key column="CUSTOMER_ID"></key>
			<index type="string" column="IMAGE_NAME"></index>
			<composite-element class="mypack.Image">
				<parent name="customer"/>
				<property name="filename" column="FILENAME"></property>
			</composite-element>
		</map>