hibernate学习12之Collection（集合）映射

<!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.url">jdbc:mysql://localhost/hibernate_collection_mapping</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">bjsxt</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.show_sql">true</property>

<mapping resource="com/bjsxt/hibernate/CollectionMapping.hbm.xml"/>
</session-factory>
</hibernate-configuration>

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

public class CollectionMapping {
private int id;
private String name;
private Set setValue;
private List listValue;
private String[] arrayValue;
private Map mapValue;
//setter，getter
}

<?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>
<class name="com.bjsxt.hibernate.CollectionMapping" table="t_CollectionMapping">
<id name="id">
<generator class="native"/>
</id>
<property name="name"/>
<set name="setValue" table="t_set_value">
<key column="set_id"/>
<element type="string" column="set_value"/>
</set>
<list name="listValue" table="t_list_value">
<key column="list_id"/>
<list-index column="list_index"/>
<element type="string" column="list_value"/>
</list>
<array name="arrayValue" table="t_array_value">
<key column="array_id"/>
<list-index column="array_index"/>
<element type="string" column="array_value"/>
</array>
<map name="mapValue" table="t_map_value">
<key column="map_id"/>
<map-key type="string" column="map_key"/>
<element type="string" column="map_value"/>
</map>
</class>
</hibernate-mapping>

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 junit.framework.TestCase;

public class CollectionMappintTest extends TestCase {

public void testSave1() {
Session session = null;
CollectionMapping c = new CollectionMapping();

c.setName("xxx");

Set setValue = new HashSet();
setValue.add("a");
setValue.add("b");
c.setSetValue(setValue);

List listValue = new ArrayList();
listValue.add("c");
listValue.add("d");
c.setListValue(listValue);

String[] arrayValue = new String[]{"e", "f"};
c.setArrayValue(arrayValue);

Map mapValue = new HashMap();
mapValue.put("k1", "v1");
mapValue.put("k2", "v2");
c.setMapValue(mapValue);
try {
session = HibernateUtils.getSession();
session.beginTransaction();
session.save(c);
session.getTransaction().commit();
}catch(Exception e) {
e.printStackTrace();
session.getTransaction().rollback();
}finally {
HibernateUtils.closeSession(session);
}
}

public void testLoad1() {
Session session = null;
try {
session = HibernateUtils.getSession();
session.beginTransaction();
CollectionMapping c = (CollectionMapping)session.load(CollectionMapping.class, 1);
System.out.println("name=" + c.getName());
System.out.println("setvalue=" + c.getSetValue());
System.out.println("mapvalue=" + c.getMapValue());
System.out.println("listvalue=" + c.getListValue());
session.getTransaction().commit();
}catch(Exception e) {
e.printStackTrace();
session.getTransaction().rollback();
}finally {
HibernateUtils.closeSession(session);
}
}

}