Java Tutorial/Hibernate/Session
Содержание
Create Criteria from Session
File: Main.java
<source lang="java">
import java.util.Date; import java.util.Iterator; import java.util.List; import org.hibernate.Criteria; import org.hibernate.Session; public class Main {
public static void main(String[] args) throws Exception {
HibernateUtil hibernateUtil = new HibernateUtil();
hibernateUtil
.executeSQLCommand("create table survey (id int,name varchar, purchasedate date);");
Session session = hibernateUtil.getSession();
Survey survey = new Survey();
survey.setName("Survey");
survey.setPurchaseDate(new Date());
session.save(survey);
session.flush();
Criteria crit = session.createCriteria(Survey.class);
List results = crit.list();
Iterator iter = results.iterator();
while (iter.hasNext()) {
Survey cd = (Survey) iter.next();
System.out.println("Result Name:"+cd.getName());
}
session.close();
hibernateUtil.checkData("select * from survey");
}
}</source>
Create Query from Session
File: Main.java
<source lang="java">
import java.util.List; import org.hibernate.Query; import org.hibernate.Session; public class Main {
public static void main(String[] args) throws Exception {
HibernateUtil hibernateUtil = new HibernateUtil();
hibernateUtil
.executeSQLCommand("create table speakers (uid int, firstName varchar,lastName varchar, event_id int);");
hibernateUtil
.executeSQLCommand("create table locations (uid int, name varchar, address varchar, event_id int);");
hibernateUtil
.executeSQLCommand("create table attendees (uid int, firstName varchar, lastName varchar, event_id int);");
hibernateUtil
.executeSQLCommand("create table events (uid int , name varchar, start_date date, duration integer,location_id int);");
Session session = hibernateUtil.getSession();
Event e = new Event();
e.setName("testSave");
session.saveOrUpdate(e);
session.flush();
Query query = session.createQuery("from Event");
List list = query.list();
session.close();
hibernateUtil.checkData("select * from events");
hibernateUtil.checkData("select * from speakers");
hibernateUtil.checkData("select * from locations");
hibernateUtil.checkData("select * from attendees");
}
}</source>
Let Hibernate to decide whether to save or update
File: Main.java
<source lang="java">
import java.util.HashSet; import org.hibernate.Session; public class Main {
public static void main(String[] args) throws Exception {
HibernateUtil hibernateUtil = new HibernateUtil();
hibernateUtil
.executeSQLCommand("create table speakers (uid int, firstName varchar,lastName varchar, event_id int);");
hibernateUtil
.executeSQLCommand("create table locations (uid int, name varchar, address varchar, event_id int);");
hibernateUtil
.executeSQLCommand("create table attendees (uid int, firstName varchar, lastName varchar, event_id int);");
hibernateUtil
.executeSQLCommand("create table events (uid int , name varchar, start_date date, duration integer,location_id int);");
Session session = hibernateUtil.getSession();
Event e = new Event();
e.setName("testSave");
session.saveOrUpdate(e);
session.flush();
session.close();
hibernateUtil.checkData("select * from events");
hibernateUtil.checkData("select * from speakers");
hibernateUtil.checkData("select * from locations");
hibernateUtil.checkData("select * from attendees");
}
}</source>
Listen to Session Event
File: Main.java
<source lang="java">
import org.hibernate.HibernateException; import org.hibernate.Session; import org.hibernate.event.AutoFlushEvent; import org.hibernate.event.DeleteEvent; import org.hibernate.event.DirtyCheckEvent; import org.hibernate.event.EvictEvent; import org.hibernate.event.FlushEntityEvent; import org.hibernate.event.FlushEvent; import org.hibernate.event.InitializeCollectionEvent; import org.hibernate.event.LoadEvent; import org.hibernate.event.LockEvent; import org.hibernate.event.MergeEvent; import org.hibernate.event.PersistEvent; import org.hibernate.event.PostLoadEvent; import org.hibernate.event.PreLoadEvent; import org.hibernate.event.RefreshEvent; import org.hibernate.event.ReplicateEvent; import org.hibernate.event.SaveOrUpdateEvent; import org.hibernate.event.def.DefaultAutoFlushEventListener; import org.hibernate.event.def.DefaultDeleteEventListener; import org.hibernate.event.def.DefaultDirtyCheckEventListener; import org.hibernate.event.def.DefaultEvictEventListener; import org.hibernate.event.def.DefaultFlushEntityEventListener; import org.hibernate.event.def.DefaultFlushEventListener; import org.hibernate.event.def.DefaultInitializeCollectionEventListener; import org.hibernate.event.def.DefaultLoadEventListener; import org.hibernate.event.def.DefaultLockEventListener; import org.hibernate.event.def.DefaultMergeEventListener; import org.hibernate.event.def.DefaultPersistEventListener; import org.hibernate.event.def.DefaultPostLoadEventListener; import org.hibernate.event.def.DefaultPreLoadEventListener; import org.hibernate.event.def.DefaultRefreshEventListener; import org.hibernate.event.def.DefaultReplicateEventListener; import org.hibernate.event.def.DefaultSaveOrUpdateEventListener; import org.hibernate.mapping.Map; public class Main {
public static void main(String[] args) throws Exception {
HibernateUtil hibernateUtil = new HibernateUtil();
hibernateUtil
.executeSQLCommand("create table Product(id int, name varchar, description varchar, price decimal(6,2), supplierid int)");
hibernateUtil.executeSQLCommand("create table Supplier (id int , name varchar)");
hibernateUtil
.executeSQLCommand("create table Software(id int, name varchar, description varchar, price decimal(6,2), supplierid int, version varchar)");
hibernateUtil.getConfiguration().setListener("save-update", new MySaveOrUpdateEventListener());
// Apply this event listener (programmatically)
hibernateUtil.getConfiguration().setListener("auto-flush", new MyAutoFlushEventListener());
hibernateUtil.getConfiguration().setListener("delete", new MyDeleteEventListener());
hibernateUtil.getConfiguration().setListener("dirty-check", new MyDirtyCheckEventListener());
hibernateUtil.getConfiguration().setListener("evict", new MyEvictEventListener());
hibernateUtil.getConfiguration().setListener("flush-entity", new MyFlushEntityEventListener());
hibernateUtil.getConfiguration().setListener("flush", new MyFlushEventListener());
hibernateUtil.getConfiguration().setListener("load-collection",
new MyInitializeCollectionEventListener());
hibernateUtil.getConfiguration().setListener("load", new MyLoadEventListener());
hibernateUtil.getConfiguration().setListener("lock", new MyLockEventListener());
hibernateUtil.getConfiguration().setListener("merge", new MyMergeEventListener());
hibernateUtil.getConfiguration().setListener("persist", new MyPersistEventListener());
hibernateUtil.getConfiguration().setListener("post-load", new MyPostLoadEventListener());
hibernateUtil.getConfiguration().setListener("pre-load", new MyPreLoadEventListener());
hibernateUtil.getConfiguration().setListener("refresh", new MyRefreshEventListener());
hibernateUtil.getConfiguration().setListener("replicate", new MyReplicateEventListener());
hibernateUtil.getConfiguration().setListener("save-update", new MySaveOrUpdateEventListener());
Session session = hibernateUtil.getConfiguration().buildSessionFactory().openSession();
Supplier superCorp = new Supplier();
superCorp.setName("Supplier1");
session.save(superCorp);
Supplier megaInc = new Supplier();
megaInc.setName("Supplier2");
session.save(megaInc);
Product mouse = new Product("Product1", "first product", 20.0);
mouse.setSupplier(superCorp);
superCorp.getProducts().add(mouse);
session.flush();
Product mouse2 = new Product("Product2", "second product", 22.0);
mouse2.setSupplier(superCorp);
superCorp.getProducts().add(mouse2);
Product keyboard = new Product("Product3", "third product", 30.0);
keyboard.setSupplier(megaInc);
megaInc.getProducts().add(keyboard);
Software webBrowser = new Software("Web Browser", "new browser", 75.0, "2.0");
webBrowser.setSupplier(superCorp);
superCorp.getProducts().add(webBrowser);
Software email = new Software("Email", "email client", 49.99, "4.1 Edition");
email.setSupplier(megaInc);
megaInc.getProducts().add(email);
session.flush();
session.close();
hibernateUtil.checkData("select * from Product");
hibernateUtil.checkData("select * from Software");
hibernateUtil.checkData("select * from Supplier");
}
} class MySaveOrUpdateEventListener extends DefaultSaveOrUpdateEventListener {
public void onSaveOrUpdate(SaveOrUpdateEvent event) {
System.out.println(event.getEntity());
super.onSaveOrUpdate(event);
}
} class MyAutoFlushEventListener extends DefaultAutoFlushEventListener {
public void onAutoFlush(AutoFlushEvent event) throws HibernateException {
System.out.println("AutoFlushEventListener.onAutoFlush(AutoFlushEvent)");
super.onAutoFlush(event);
}
} class MyDeleteEventListener extends DefaultDeleteEventListener {
public void onDelete(DeleteEvent event) throws HibernateException {
System.out.println("DeleteEventListener.onDelete(DeleteEvent)");
super.onDelete(event);
}
} class MyDirtyCheckEventListener extends DefaultDirtyCheckEventListener {
public void onDirtyCheck(DirtyCheckEvent event) {
System.out.println("DirtyCheckEventListener.onDirtyCheck(DirtyCheckEvent)");
super.onDirtyCheck(event);
}
} class MyEvictEventListener extends DefaultEvictEventListener {
public void onEvict(EvictEvent event) throws HibernateException {
System.out.println("EvictEventListener.onEvict(EvictEvent)");
super.onEvict(event);
}
} class MyFlushEntityEventListener extends DefaultFlushEntityEventListener {
public void onFlushEntity(FlushEntityEvent event) throws HibernateException {
System.out.println("FlushEntityEventListener.onFlushEntity(FlushEntityEvent)");
super.onFlushEntity(event);
}
} class MyFlushEventListener extends DefaultFlushEventListener {
public void onFlush(FlushEvent event) throws HibernateException {
System.out.println("FlushEventListener.onFlush(FlushEvent)");
super.onFlush(event);
}
} class MyInitializeCollectionEventListener extends DefaultInitializeCollectionEventListener {
public void onInitializeCollection(InitializeCollectionEvent event) throws HibernateException {
System.out
.println("InitializeCollectionEventListener.onInitializeCollection(InitializeCollectionEvent)");
super.onInitializeCollection(event);
}
} class MyLoadEventListener extends DefaultLoadEventListener {
public void onLoad(LoadEvent event, LoadType type) throws HibernateException {
System.out.println("LoadEventListener.onLoad(LoadEvent,LoadType)");
super.onLoad(event, type);
}
} class MyLockEventListener extends DefaultLockEventListener {
public void onLock(LockEvent event) throws HibernateException {
System.out.println("LockEventListener.onLock(LockEvent)");
super.onLock(event);
}
} class MyMergeEventListener extends DefaultMergeEventListener {
public void onMerge(MergeEvent event, Map copiedAlready) {
System.out.println("MergeEventListener.onMerge(MergeEvent,Map)");
// super.onMerge(event, copiedAlready);
}
public void onMerge(MergeEvent event) throws HibernateException {
System.out.println("MergeEventListener.onMerge(MergeEvent)");
super.onMerge(event);
}
} class MyPersistEventListener extends DefaultPersistEventListener {
public void onPersist(PersistEvent event, Map createdAlready) throws HibernateException {
System.out.println("PersistEventListener.onPersist(PersistEvent,Map)");
// super.onPersist(event, createdAlready);
}
public void onPersist(PersistEvent event) throws HibernateException {
System.out.println("PersistEventListener.onPersist(PersistEvent)");
super.onPersist(event);
}
} class MyPostLoadEventListener extends DefaultPostLoadEventListener {
public void onPostLoad(PostLoadEvent event) {
System.out.println("PostLoadEventListener.onPostLoad(onPostLoad)");
super.onPostLoad(event);
}
} class MyPreLoadEventListener extends DefaultPreLoadEventListener {
public void onPreLoad(PreLoadEvent event) {
System.out.println("PreLoadEventListener.onPreLoad(PreLoadEvent)");
super.onPreLoad(event);
}
} class MyRefreshEventListener extends DefaultRefreshEventListener {
public void onRefresh(RefreshEvent event) throws HibernateException {
System.out.println("RefreshEventListener.onRefresh(RefreshEvent)");
super.onRefresh(event);
}
} class MyReplicateEventListener extends DefaultReplicateEventListener {
public void onReplicate(ReplicateEvent event) throws HibernateException {
System.out.println("ReplicateEventListener.onReplicate(ReplicateEvent)");
super.onReplicate(event);
}
} class NoisySaveOrUpdateEventListener extends DefaultSaveOrUpdateEventListener {
public void onSaveOrUpdate(SaveOrUpdateEvent event) throws HibernateException {
System.out.println("SaveOrUpdateEventListener.onSaveOrUpdate(SaveOrUpdateEvent)");
super.onSaveOrUpdate(event);
}
}</source>
Save and update event
File: Main.java
<source lang="java">
import java.io.Serializable; import org.hibernate.HibernateException; import org.hibernate.Session; import org.hibernate.event.SaveOrUpdateEvent; import org.hibernate.event.def.DefaultSaveOrUpdateEventListener; public class Main {
public static void main(String[] args) throws Exception {
HibernateUtil hibernateUtil = new HibernateUtil();
hibernateUtil
.executeSQLCommand("create table Product(id int, name varchar, description varchar, price decimal(6,2), supplierid int)");
hibernateUtil.executeSQLCommand("create table Supplier (id int , name varchar)");
hibernateUtil
.executeSQLCommand("create table Software(id int, name varchar, description varchar, price decimal(6,2), supplierid int, version varchar)");
hibernateUtil.getConfiguration().setListener("save-update", new MySaveOrUpdateEventListener());
Session session = hibernateUtil.getConfiguration().buildSessionFactory().openSession();
Supplier superCorp = new Supplier();
superCorp.setName("Supplier1");
session.save(superCorp);
Supplier megaInc = new Supplier();
megaInc.setName("Supplier2");
session.save(megaInc);
Product mouse = new Product("Product1", "first product", 20.0);
mouse.setSupplier(superCorp);
superCorp.getProducts().add(mouse);
session.flush();
Product mouse2 = new Product("Product2", "second product", 22.0);
mouse2.setSupplier(superCorp);
superCorp.getProducts().add(mouse2);
Product keyboard = new Product("Product3", "third product", 30.0);
keyboard.setSupplier(megaInc);
megaInc.getProducts().add(keyboard);
Software webBrowser = new Software("Web Browser", "new browser", 75.0, "2.0");
webBrowser.setSupplier(superCorp);
superCorp.getProducts().add(webBrowser);
Software email = new Software("Email", "email client", 49.99, "4.1 Edition");
email.setSupplier(megaInc);
megaInc.getProducts().add(email);
session.flush();
session.close();
hibernateUtil.checkData("select * from Product");
hibernateUtil.checkData("select * from Software");
hibernateUtil.checkData("select * from Supplier");
}
} class MySaveOrUpdateEventListener extends DefaultSaveOrUpdateEventListener {
public void onSaveOrUpdate(SaveOrUpdateEvent event) {
System.out.println(event.getEntity());
super.onSaveOrUpdate(event);
}
}</source>
