Hibernate3 Learning Notes (V) Saveorupdate method

or refer to the previous example: Http://blog.csdn.net/kunshan_shenbin/archive/2008/09/02/2864883.aspx

Modify the User.hbm.xml file as follows:

<?xml version= "1.0" encoding= "UTF-8"?>

<! DOCTYPE hibernate-mapping Public

"-//hibernate/hibernate Mapping DTD 3.0//en"

"Http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >

<class name= "Com.hb3.pack_01.model. User "table=" user "

Dynamic-insert= "true"

Dynamic-update= "true"

>

<id name= "id" column= "id" type= "java.lang.Integer" unsaved-value= "null" >

<generator class= "native"/>

</id>

<property name= "name" column= "name" type= "java.lang.String"/>

<property name= "Age" column= "Age" type= "Java.lang.Integer"/>

</class>

Test code:

Package com.hb3.pack_01;

Import Java.util.Iterator;

Import java.util.List;

Import Org.hibernate.Criteria;

Import Org.hibernate.Query;

Import org.hibernate.Session;

Import Org.hibernate.SessionFactory;

Import org.hibernate.Transaction;

Import org.hibernate.cfg.Configuration;

Import Com.hb3.pack_01.model. User;

public class Businessservice {

public static void Main (string[] args) {

Configuration config = new Configuration (). Configure ();

Sessionfactory sessionfactory = Config.buildsessionfactory ();

Session session = Sessionfactory.opensession ();

Criteria criteria = Session.createcriteria (User.class);

list<?> users = Criteria.list ();

Iterator<?> iterator = Users.iterator ();

SYSTEM.OUT.PRINTLN ("ID \ t name/age");

while (Iterator.hasnext ()) {

User user = (user) iterator.next ();

System.out.println (User.getid () + "T" + user.getname () + "/" + user.getage ());

}

Session.close ();

System.out.println ("========================================");

Session = Sessionfactory.opensession ();

User user = new user ();

User.setid (2);

User.setname ("Chenyan");

User.setage (New Integer (24));

Transaction tx = Session.begintransaction ();

Session.saveorupdate (user);

Tx.commit ();

System.out.println ("========================================");

user = new User ();

User.setname ("Yangye");

User.setage (New Integer (23));

tx = Session.begintransaction ();

Session.saveorupdate (user);

Tx.commit ();

System.out.println ("========================================");

Query query = Session.createquery ("from User");

Users = Query.list ();

iterator = Users.iterator ();

SYSTEM.OUT.PRINTLN ("ID \ t name/age");

while (Iterator.hasnext ()) {

user = (user) iterator.next ();

System.out.println (User.getid () + "T" + user.getname () + "/" + user.getage ());

}

Session.close ();

Sessionfactory.close ();

}

}