[ajug-members] Hibernate

[Barnes, Michael]

Thanks for all of your response. This appears to be to simplest example for
me to digest.

Thanks

-----Original Message-----
From: ajug-members-bounces at ajug.org
[mailto:ajug-members-bounces at ajug.org]On Behalf Of Narendra Kharya
Sent: Monday, November 15, 2004 3:04 PM
To: ajug-members at ajug.org
Subject: RE: [ajug-members] Hibernate


see if this is helpful...............


Create a class name Cat like -
package org.hibernate.auction;
public class Cat {

    private String id;
    private String name;
    private char sex;
    private float weight;

    public Cat() {
    }

    public String getId() {
        return id;
    }

    private void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public char getSex() {
        return sex;
    }

    public void setSex(char sex) {
        this.sex = sex;
    }

    public float getWeight() {
        return weight;
    }

    public void setWeight(float weight) {
        this.weight = weight;
    }

}

after creating the class make the mapping xml file name Cat.hbm.xml-
in the same directory.

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

<hibernate-mapping>

    <class name="org.hibernate.auction.Cat" table="CAT">

        <!-- A 32 hex character is our surrogate key. It's automatically
            generated by Hibernate with the UUID pattern. -->
        <id name="id" type="string" unsaved-value="null" >
            <column name="CAT_ID" sql-type="char(32)" not-null="true"/>
            <generator class="uuid.hex"/>
        </id>

        <!-- A cat has to have a name, but it shouldn' be too long. -->
        <property name="name">
            <column name="NAME" length="16" not-null="true"/>
        </property>

        <property name="sex"/>

        <property name="weight"/>

    </class>

</hibernate-mapping>

once this file is made then make a class  with main method  --
public static void main(String[] args) throws Exception {
		final Main test = new Main();

		Configuration cfg = new Configuration()
			.addClass(Cat.class)
//this will create CAT table in the database using the mapping file.
			.setProperty(Environment.HBM2DDL_AUTO, "create");;

		//cfg.setProperty("hibernate.show_sql", "true");

		test.factory = cfg.buildSessionFactory();


		Session s = test.factory.openSession();
		Transaction tx=null;
		try {
			tx = s.beginTransaction();
			Cat princess = new Cat();
			princess.setName("Princess");
			princess.setSex('F');
			princess.setWeight(7.4f);
			s.save(princess) ;
			tx.commit();
		}
		catch (Exception e) {
			if (tx!=null) tx.rollback();
			throw e;
		}
		finally {
			s.close();
		}




Narendra B Kharya
617-501-2045(cell)




From: "Barnes, Michael" <MBarnes at tiaa-cref.org>
Reply-To: "General AJUG membership forum (100-200 
messages/month)"<ajug-members at ajug.org>
To: "'ajug-members at ajug.org'" <ajug-members at ajug.org>
Subject: [ajug-members] Hibernate
Date: Mon, 15 Nov 2004 14:16:26 -0500

I have just started on a project that will be using Hibernate and am looking
for a "Hello World" tutorial. Can someone recommend one that I can look use
to understand hibernate?

Thanks
Mike


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