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Hi all,

The application is running perfectly but it is not updating in the database table.

My code:


package roseindia.tutorial.hibernate;

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
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 Record1");
Contact contact = new Contact();
System.out.println("Inserting");
contact.setId(6);
contact.setFirstName("Deepak");
contact.setLastName("Kumar");
contact.setEmail("deepak_38@yahoo.com");
session.save(contact);

System.out.println("Done2");
}catch(Exception e){
System.out.println("Error"+e);
}finally{
// Actual contact insertion will happen at this step
session.flush();

session.close();

}

}
}

Bump up the logging to debug, which may give you some insight into your problem. You may want to bump your logging up to include the SQL that Hibernate is generating. You can do so by following:

http://www.javalobby.org/java/forums/t44119.html

You need to wrap your save or update with a transaction.






Hope this works for you.

Don't forget to rate! :)

The solutions u give was perfectly working in my house but in my office the same example gives an exception given below:

Exception in thread "main" java.lang.NullPointerException
at roseindia.tutorial.hibernate.FirstExample.main(FirstExample.java:37)

Looks like an application problem. What is on FirstExample.java line 37?

Also, be sure that you don't have other errors above that. Could be that you are pointing at the wrong database or the database does not exist.

The code I gave was correct.

It is pointing towards flush() methods

No there are no error other than this.

You are not providing enough information for me to help.

hello sir
i am right out of office so i will give u the most details on monday.

Thanks u vm

This is the example code:


package hibernate.tutorial;

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
SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
System.out.println("Done");
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(6);
contact.setFirstName("Shiva");
contact.setLastName("Kumar");
contact.setEmail("shiva@yahoo.com");
session.saveOrUpdate(contact);

System.out.println("Done");
}catch(Exception e){
System.out.println("Error:"+e);
}finally{
// Actual contact insertion will happen at this step
session.flush();
session.close();

}

}
}


This is my class :
[b]package hibernate.tutorial;


public class Contact {
private String firstName;
private String lastName;
private String email;
private int id;

public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}



}




[/b]


This is my hbm file:
<?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="roseindia.tutorial.hibernate.Contact" table="contact">
<id name="id" type="int" column="ID" >
<generator class="assigned"/>
</id>

<property name="firstName">
<column name="FIRSTNAME" />
</property>
<property name="lastName">
<column name="LASTNAME"/>
</property>
<property name="email">
<column name="EMAIL"/>
</property>
</class>
</hibernate-mapping>

This is my config file:

<?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/hiber</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">shiva</property>
<property name="hibernate.connection.pool_size">10</property>
<property name="show_sql">true</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<!-- Mapping files -->
<mapping resource="contact.hbm.xml"/>
</session-factory>
</hibernate-configuration>


When i execute my FirstExample.java
I am getting exception given below:

Exception in thread "main" java.lang.NullPointerException
at hibernate.tutorial.FirstExample.main(FirstExample.java:32)

Hi,

Can u give full stacktrace of the exception.

Exception:-

Exception in thread "main" java.lang.NoClassDefFoundError: org/dom4j/DocumentException
at hibernate.tutorial.FirstExample.main(FirstExample.java:16)