I used, at now, the latest versions of...
Eclipse Kepler for JavaEE developer
Hibernate ORM 4.3.4
Java 6
MySQL 5.5(more mysql connector... download here)
...all installed on my Debian Wheezy...
Here's a smart guide to create a very small project for Hibernate capabilities.
For Hibernate ORM 4.3.4 resources file, please refer to official site for download latest version.
1) Eclipse: create a new Java Project.
2) Add in the classpath(right click on the project -> properties -> Java Build Path -> Libraries -> Add external libraries) the libraries contained into the hibernate zip file(currently is hibernate-release-4.3.4.Final.zip) you download. You can put only the contents of the "required" folder.
3) Add in the classpath the mysql-connector_XXX.jar(from here) depends of the version of your db version and of connector version....
4) Into src folder create the bean class that maps the persistent object
package com.bean;
import java.io.Serializable;
import java.lang.String;
/**
* Entity implementation class for Entity: User
* @author Maurizio Franco
* http://maurizio-franco.blogspot.it
* maurizio.franco@ymail.com
*/
public class User implements Serializable {
private static final long serialVersionUID = 1L;
private int id;
private String username;
private String password;
private String email;
public User() {
super();
}
public int getId() {
return this.id;
}
public void setId(int id) {
this.id = id;
}
public String getUsername() {
return this.username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return this.password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return this.email;
}
public void setEmail(String email) {
this.email = email;
}
}
5) Here is the table script....
CREATE TABLE Users (
id INT(5) NOT NULL AUTO_INCREMENT,
username VARCHAR(20) NOT NULL,
email VARCHAR(40) NOT NULL,
password VARCHAR(20) NOT NULL,
PRIMARY KEY(id)
);
6) Then the class thats provides to test the insert of data....
package com.test;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import com.bean.User;
/**
*
* Test class, to run simple database operations...
*
* @author Maurizio Franco
* http://maurizio-franco.blogspot.it
* maurizio.franco@ymail.com
*/
public class StoreData {
public static void main(String[] args) {
System.out.println("StoreData - START");
//creating configuration object
Configuration cfg=new Configuration();
//populates the data of the configuration file
cfg.configure("hibernate.cfg.xml");
//creating seession factory object
SessionFactory factory=cfg.buildSessionFactory();
//creating session object
Session session=factory.openSession();
//creating transaction object
Transaction t=session.beginTransaction();
User e1=new User();
e1.setUsername("usernamexxx");
e1.setPassword("pwdxxx");
e1.setEmail("mail@xxxx");
session.persist(e1);//persisting the object
t.commit();//transaction is committed
session.close();
System.out.println("StoreData - successfully saved");
}
}
7) Now under the src folder you have to create two configuration files.
The first map the bean/persistent object. It's user.hbm.xml
Note that here we map the com.bean.User to the Users table.
<?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">
<hibernate-mapping>
<class name="com.bean.User" table="Users">
<id name="id">
<generator class="assigned"></generator>
</id>
<property name="username"></property>
<property name="password"></property>
<property name="email"></property>
</class>
</hibernate-mapping>
8) the other configuration file maps contains database connection info.
Also this is under the src folder. It's hibernate.cfg.xml
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hbm2ddl.auto">update</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="connection.url">jdbc:mysql://localhost:3306/your_db_name</property>
<property name="connection.username">your_username</property>
<property name="connection.password">your_password</property>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<mapping resource="user.hbm.xml"/>
</session-factory>
</hibernate-configuration>
That's all.... or not?? Remember to customize your hibernate.cfg.xml....
in connection.url, connection.username and connection.password properties....
Execute the main method of StoreData class....
It will provides the simple insert operation...
You can find a small project(contains all you have seen up to here) into a branch of sourceforce.net svn.
It's ready to use...
The url is:
svn://svn.code.sf.net/p/mauriziofranco/code/StartingWithHibernate/trunk/StartingWithHibernate
And the istructions from command line are:
svn checkout svn://svn.code.sf.net/p/mauriziofranco/code/StartingWithHibernate/trunk/StartingWithHibernate mauriziofranco-code
Bye..
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