Mapping Hibernate to MySQL (BEGINNER)

Question

Is there a way to map an Entity class (Address.java) to MySQL without using Hibernate Mapping (.hbm files)

What i need to do is to Create a table called 'Address' in the MySQL DB, and create Columns with the attributes of this class, and later populate them.

But i need to do it without writing Hibernate mapping files (The .hbm files).

Persistence is one way of doing it, If so can someone tell me how to do it ?

duffymo · Accepted Answer · 2011-09-10 02:23:30Z

1

Every ORM mapping has three parts:

Object(s)
Relational table(s)
Mapping(s)

You have to have two to generate the third. If you have an object and its mapping, you can generate the table. If you have the table and the mapping, you can generate the object.

The only way you can generate without having to establish mappings is to use a framework like Grails that favors convention over configuration. That means they make assumptions about the mapping on your behalf.

But the ORM tool can't read your mind.

answered Sep 10, 2011 at 2:23

duffymo

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1 Comment

duffymo Over a year ago

Annotations ARE a form of mapping.

Matt Ball · Accepted Answer · 2011-09-10 02:21:50Z

0

Use annotations instead of XML: http://docs.jboss.org/hibernate/annotations/3.5/reference/en/html_single/#entity-overview

In your case, you would start by annotating the Address class with @Entity:

@Entity
@Table(name = "Address")
public class Address implements Serializable
{
    // fields
    // ctors
    // getters & setters
}

answered Sep 10, 2011 at 2:21

Matt Ball

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2 Comments

Illep Over a year ago

So will this, create the Tables, and the corresponding attributes and the hibernate mapping ? So when i call saveToAddress (Address address) , and pass and object of Address here, is it suppose to be saved in the DB, without i having to write hibernate mapping files ?

Matt Ball Over a year ago

To create the tables, you'd use hbm2ddl: docs.jboss.org/hibernate/core/3.5/reference/en/html/…

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