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2010-06-01T06:51:52Z

1 версия

в 18:01, 31 мая 2010

2010-05-31T18:01:45Z

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== Load An Object By ID ==



<source lang="java">
/////////////////////////////////////////////////////////////////////////
import java.util.*;
import org.hibernate.*;
import org.hibernate.criterion.*;
public class SimpleRetrieveTest {

public static void main(String[] args) {
HibernateUtil.setup("create table EVENTS ( uid int, name VARCHAR, start_Date date, duration int, location_id int);");
HibernateUtil.setup("create table locations ( uid int, name VARCHAR, address VARCHAR);");
// hibernate code start
Session session = HibernateUtil.currentSession();
Transaction tx = session.beginTransaction();

Location location = new Location();
location.setName("USA");
location.setAddress("Address");
session.save(location);

Event e= new Event();
e.setId(11111L);
e.setName("testSave");
e.setStartDate(new Date());
e.setLocation(location);
session.save(e);
Event loadedEvent = (Event)session.load(Event.class, e.getId());

System.out.println(loadedEvent.getName());
tx.rumit();
HibernateUtil.closeSession();
HibernateUtil.sessionFactory.close();
// hibernate code end
}
}

/////////////////////////////////////////////////////////////////////////

import java.util.Date;
public class Event {
private Long id;
private String name;
private Date startDate;
private int duration;
private Location location;
public void setId(Long id) {
this.id = id;
}

public Long getId() {
return id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Date getStartDate() {
return startDate;
}
public void setStartDate(Date startDate) {
this.startDate = startDate;
}
public int getDuration() {
return duration;
}
public void setDuration(int duration) {
this.duration = duration;
}
public Location getLocation() {
return location;
}
public void setLocation(Location location) {
this.location = location;
}

}

/////////////////////////////////////////////////////////////////////////
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 2.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping>

<class name="Event" table="events">
<id name="id" column="uid" type="long" unsaved-value="null">
<generator class="assigned"/>
</id>
<property name="name" type="string" length="100"/>
<property name="startDate" column="start_date"
type="date"/>
<property name="duration" type="integer"/>
<many-to-one name="location" column="location_id"
class="Location"/>
</class>
</hibernate-mapping>

/////////////////////////////////////////////////////////////////////////
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 2.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping >
<class name="Location" table="locations" lazy="true">
<id name="id" column="uid" type="long">
<generator class="native"/>
</id>
<property name="name" type="string"/>
<property name="address" type="string"/>
</class>
</hibernate-mapping>

/////////////////////////////////////////////////////////////////////////
public class Location {
private Long id;
private String name;
private String address;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}

/////////////////////////////////////////////////////////////////////////
<?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">
<hibernate-configuration>
<session-factory>

<property name="connection.driver_class">org.hsqldb.jdbcDriver</property>
<property name="connection.url">jdbc:hsqldb:data/tutorial</property>
<property name="connection.username">sa</property>
<property name="connection.password"></property>

<property name="connection.pool_size">1</property>

<property name="dialect">org.hibernate.dialect.HSQLDialect</property>

<property name="show_sql">true</property>
<mapping resource="Event.hbm.xml"/>
<mapping resource="Location.hbm.xml"/>
<mapping resource="Speaker.hbm.xml"/>
</session-factory>
</hibernate-configuration>

</source>

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Admin: 1 версия

в 18:01, 31 мая 2010