Some methods of Hibernate basic crud
CRUD is the abbreviation for Create, READ, UPDATE, delete
The methods for inserting records in 1.Hibernate are:
Session.save ();
Session.persist ();
The methods for querying records in 2.Hibernate are:
Session.get ()
Session.load ();
The methods for updating records in 3.Hibernate are:
Session.update ();
Session.updateorsave ();
Session.merge ();
The methods for deleting records in 4.Hibernate are:
Session.delete ();
Instance
| The code is as follows |
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| Package Org. Rudiment.hibernate; Import Java.util.Iterator;
Import java.util.List; Import Org.hibernate.Query;
Import org.hibernate.Session;
Import Org.hibernate.SessionFactory;
Import org.hibernate.Transaction;
Import org.hibernate.cfg.Configuration;
Import Org.hibernate.service.ServiceRegistry;
Import Org.hibernate.service.ServiceRegistryBuilder; public class Hibernatehandler {
/* Insert new data * *
public static void Insertobejct (News N)
{
Create a Configuration object
Configuration conf = new Configuration ();
serviceregistry sr = new Serviceregistrybuilder ()
. Applysettings (Conf.getproperties ())
. Buildserviceregistry ();
Get sessionfactory from Configuration object
Sessionfactory SF = Conf.configure (). Buildsessionfactory (SR);
Get to a session via Sessionfactory
Session Sess = Sf.opensession ();
Session that starts the sessions transaction
Transaction tx = Sess.begintransaction ();
Set the title of this instance
N.settitle ("Hibernate frame 1");
Set the content of this instance
N.setcontent ("Hibernate frame inserted content 2");
Save Instance
Sess.save (n);
Commit a transaction
Tx.commit ();
Close session
Sess.close ();
Close Session Factory
Sf.close ();
}
* * Query Record * *
Public News Querybyid (int id)
{
Configuration conf = new Configuration ();
serviceregistry sr = new Serviceregistrybuilder ()
. Applysettings (Conf.getproperties ())
. Buildserviceregistry ();
Sessionfactory SF = Conf.configure (). Buildsessionfactory (SR);
Session Sess = Sf.opensession ();
String hql = "from News as N where n.id=?";
Query query = sess.createquery (HQL);
Query.setinteger (0, id);
List rslist = Query.list ();
Iterator It=rslist.iterator ();
News = null;
while (It.hasnext ())
{
News = (News) it.next ();
}
Sess.close ();
return news;
}
/* Update Record * *
Public News Updatebyid (int id)
{
News n = Querybyid (ID);
Configuration conf = new Configuration ();
serviceregistry sr = new Serviceregistrybuilder ()
. Applysettings (Conf.getproperties ())
. Buildserviceregistry ();
Sessionfactory SF = Conf.configure (). Buildsessionfactory (SR);
Session Sess = Sf.opensession ();
Transaction t = sess.begintransaction ();
N.settitle ("Modified, I am" + ID);
N.setcontent ("content also changed" + ID + "!");
Sess.update (n);
T.commit ();
Sess.close ();
return Querybyid (ID);
}
/* Delete Record * *
public boolean Deletebyid (int id)
{
Configuration conf = new Configuration ();
serviceregistry sr = new Serviceregistrybuilder ()
. Applysettings (Conf.getproperties ())
. Buildserviceregistry ();
Sessionfactory SF = Conf.configure (). Buildsessionfactory (SR);
Session Sess = Sf.opensession ();
String hql = "Delete News as n where n=?";
Query query = sess.createquery (HQL);
Query.setinteger (0, id);
Query.executeupdate ();
Sess.begintransaction (). commit ();
return true;
}
public static void Main (string[] args)
{
Long p_t = System.currenttimemillis ();
for (int i=0; i<10; i++)
{
News n = new News ();
HIBERNATEHANDLER.INSERTOBEJCT (n);
}
Long l_t = System.currenttimemillis ();
Long usetime = (l_t-p_t)/1000;
SYSTEM.OUT.PRINTLN ("Time Consuming:" + (Usetime) + "seconds");
}
} |
