maheshvrk3
asked on
Exception in thread "main" java.lang.NullPointerException at dao.EmployeeDao.main(EmployeeDao.java:42)
Hi,
I am new to Hibernate3.0 as well this forum.. I am happy to be member this forum...
Right now i am learning Hibernate ..herewith i have simple written simple application
for storing the data into DB using hibernate.. while running the application i ama getting above error.. see the code below.
I am new to Hibernate3.0 as well this forum.. I am happy to be member this forum...
Right now i am learning Hibernate ..herewith i have simple written simple application
for storing the data into DB using hibernate.. while running the application i ama getting above error.. see the code below.
1) This is My bean class
package Bean;
public class EmployeeBean
{
private String firstName;
private String lastName;
private String id;
public String getFirstName()
{
return firstName;
}
public void setFirstName(String firstName)
{
this.firstName = firstName;
}
public String getLastName()
{
return lastName;
}
public void setLastName(String lastName)
{
this.lastName = lastName;
}
public String getId()
{
return id;
}
public void setId(String id)
{
this.id = id;
}
}
2) I have created Table called Employee using oracle with filed names Id,FirstName, LastName
3) this is mY DAo class for storing the inot database
package dao;
import org.hibernate.SessionFactory;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
import Bean.EmployeeBean;
public class EmployeeDao
{
public static void main(String[] args)
{
Session sesssion = null;
try
{
// Configuration configuration = new Configuration();
SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
sesssion = sessionFactory.openSession();
System.out.println("Inserting Record ");
EmployeeBean employeeBean = new EmployeeBean();
employeeBean.setId("350");
employeeBean.setFirstName("Mahesh");
employeeBean.setLastName("Kuppusamy");
sesssion.save(employeeBean);
}
catch (Exception e)
{
System.out.println(e.getMessage());
}
finally
{
// Actual insert will happen here
sesssion.flush();
sesssion.close();
}
}
}
4) see the EmployeeAdd.hbm.xml here
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Jun 4, 2008 2:00:58 AM by Hibernate Tools 3.2.1.GA -->
<hibernate-mapping default-lazy="false">
<class name="Bean.EmployeeBean" table="Employee" select-before-update="true">
<id name="id" type="string">
<column name="Id" length="3" />
<generator class="assigned" />
</id>
<property name="firstName" type="string">
<column name="FirstName" length="5" not-null="true"/>
</property>
<property name="lastName" type="string">
<column name="LastName" length="5" not-null="true" />
</property>
</class>
</hibernate-mapping>
5) see the 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>
<!-- =============================================================== -->
<!-- SQL SERVER DIALECT -->
<!-- =============================================================== -->
<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="connection.url">jdbc:oracle:thin:@localhost:1521:xe</property>
<property name="hibernate.connection.username">system</property>
<property name="hibernate.connection.password">tspl</property>
<property name="hibernate.connection.pool_size">10</property>
<property name="show_sql">true</property>
<property name="dialect">org.hibernate.dialect.OracleDialect</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<!-- =============================================================== -->
<!-- HIBERNATE MAPPINGS -->
<!-- =============================================================== -->
<mapping resource="xbm/EmployeeAdd.hbm.xml"/>
</session-factory>
</hibernate-configuration>
Can you post the full stack trace?
ASKER
I have changed the catch statement to
catch (Exception e)
{
e.printStackTrace();
}
Still i am getting the same Error
Exception in thread "main" java.lang.NullPointerExcep tion
at dao.EmployeeDao.main(Emplo yeeDao.jav a:43)
catch (Exception e)
{
e.printStackTrace();
}
Still i am getting the same Error
Exception in thread "main" java.lang.NullPointerExcep
at dao.EmployeeDao.main(Emplo
ASKER
Herewith i ahve attached the sanpshot
Cannot see the snapshot.
ASKER
Please share the solution with us.
ASKER CERTIFIED SOLUTION
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ASKER
Solution to this issues is
add the following conditon in the finally
finally(
{
if(session==null)
sesssion.flush();
sesssion.close();
}
}
add the following conditon in the finally
finally(
{
if(session==null)
sesssion.flush();
sesssion.close();
}
}
ASKER
As i have added the solution for this issue.. proceedong to close the question...
Change the catch to:
}
catch (Exception e) {
e.printStackTrace();
}