Hi
I am a new user of Hibernate and I need some help.
This is the code:
Code:
package com.rosenet.pojo;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class FirstExample {
public static void main(String[] args) {
Session session = null;
try{
// This step will read hibernate.cfg.xml and prepare hibernate for use
System.out.println("I am here");
SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
session = sessionFactory.openSession();
//Create new instance of Contact and set values in it by reading them from form object
System.out.println("Inserting Record");
Contact contact = new Contact();
contact.setId(3);
contact.setFirstName("Riaz");
contact.setLastName("Uddin");
contact.setEmail("ruuddin@yahoo.com");
session.save(contact);
System.out.println("Done");
}catch(Exception e){
System.out.println(e.getMessage());
}finally{
// Actual contact insertion will happen at this step
session.flush();
session.close();
}
}
}
When i run this program in eclipse it shows Nullpointer exception at session.flush();
When i tried to debug I found that the session factory is not getting created.
the hibernate.cfg.xml file is as follows:
Code:
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/samepageinfosol</property>
<property name="hibernate.connection.username">localhost</property>
<property name="hibernate.connection.password"></property>
<property name="hibernate.connection.pool_size">10</property>
<property name="show_sql">true</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<!-- Mapping files -->
<mapping resource="contact.hbm.xml"/>
</session-factory>
</hibernate-configuration>
I have placed this file in WEB-INF/ folder and my contact.hbm.xml file is as follows:
Code:
<?xml version="1.0"?>
<!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.rosenet.pojo.Contact" table="contact">
<id name="id" type="long" column="id" >
<generator class="assigned"/>
</id>
<property name="firstName">
<column name="first_name" />
</property>
<property name="lastName">
<column name="last_name"/>
</property>
<property name="email">
<column name="email"/>
</property>
</class>
</hibernate-mapping>
What is wrong with this code... ? can someone help..
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