i am new to hibernate annotation

am trying to use hibernate annotaion with spring

flollowing is my code

the problem is that table is not geting created

----------------------------
Employee(pojo)
--------------------------------
package org.employee.model;

import java.io.*;
import javax.persistence.Column;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;
import org.hibernate.annotations.AccessType;
import javax.persistence.Entity;
@Entity
@Table(name="annotation_test")
public class Employee {

private long id;
private String nam;
private int age;
@Id
@Column(name ="id")
@GeneratedValue(strategy=GenerationType.AUTO, generator = "ID_SEQUENCE")
@SequenceGenerator(name="ID_SEQUENCE", sequenceName = "id_sequence")
public long getId() {
return id;
}

public void setId(long id) {
this.id = id;
}

@Column(name = "nam", nullable = false, length=50)
public String getNam() {
return nam;
}

public void setNam(String nam) {
this.nam = nam;
}
@Column(name="age")
public int getAge() {
return age;
}

public void setAge(int age) {
this.age = age;
}


}



--------------------------
employee-servlet.xml
---------------------------

<!--============================ Hibernate SessionFactory configuration===================================-->
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource">
<ref local="dataSource"/>
</property>
<property name="configLocation">
<value>WEB-INF/hibernate.cfg.xml</value></property>
<property name="configurationClass">
<value>org.hibernate.cfg.AnnotationConfiguration</value>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.max_fetch_depth">3</prop>

</props>
</property>
</bean>

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass" value="com.mysql.jdbc.Driver"/>
<property name="jdbcUrl" value="jdbc:mysql://...."/>
<property name="user" value="xuser"/>
<property name="password" value="xuser"/>
</bean>



----------------------
hibernate.cfg.xml
-----------------------------
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
<session-factory>
<mapping class="org.employee.model.Employee"/>
</session-factory>
</hibernate-configuration>

I'd recommend using the AnnotationSessionFactoryBean instead, which is an extension of LocalSessionFactoryBean. If all you keep in hibernate.cfg.xml is your mappings you can thereby eliminate this (though I'd suggest you put your datasource parameters here).

Using AnnotationSessionFactoryBean is you give it a list of annotated classes:

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource">
<ref local="dataSource"/>
</property>

<property name="annotatedClasses">
<list>
<value>org.employee.model.Employee</value>
</list>
</property>
<property name="configLocation">
<value>WEB-INF/hibernate.cfg.xml</value></property>
<property name="configurationClass">
<value>org.hibernate.cfg.AnnotationConfiguration</value>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.max_fetch_depth">3</prop>
</props>
</property>
</bean>

Also make sure you use Hibernate 3.2 or newer, and that you use the @Entity annotation from javax.persistence.*, not Hibernate's.
Hope that helps!

See also http://www.onjava.com/pub/a/onjava/2007 ... tions.html for a gentle introduction to Hibernate annotations.

And btw, this should probably been posted on the Spring forums. :)

Oh, and you need hibernate.hbm2ddl.auto=create-drop or something similar (see docs) if you expect the tables to be generated automatically...

thanks for ur reply

i would like to asku one more thing
i have written the pojo's inside hibernate.cfg.xml
--------hibernate.cfg.xml---------
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
<session-factory>
<mapping class="org.employee.model.Employee"/>
<mapping class="org.employee.model.Test"/>
</session-factory>
</hibernate-configuration>
--------------------------------------
inside application-servlet.xml

-----------------------------------
<property name="configLocation">
<value>WEB-INF/hibernate.cfg.xml</value>
</property>
<property name="configurationClass">
<value>org.hibernate.cfg.AnnotationConfiguration</value>
</property>
--------------------------

i have changed the previous code acoording to ur reply
but i would like to work the application with hibernate.cfg.xml
is the above code enough ????
nd one more thing
if we have to take all the classes from a particular package how could we specify that
i tried
"annotatedPackages" tag instead of annotatedClass
but itzzznot working