Hi,

I was working on JPA project, i have added all the jars as well as the persistence.xml file is also saved in META-INF, but still am facing the following exception:

WARN No appenders could be found for logger (org.hibernate.cfg.annotations.Version).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named jpa
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55)
at roseindia.JPACreate.main(JPACreate.java:44)
Below are the codes for the two java class and my persistence.xml file:


Student.java

package roseindia;

import javax.persistence.Column;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.Id;

import javax.persistence.Table;

@Entity

@Table(name="student")

public class Student {

@Id

@GeneratedValue

private int id;

/**

* @return the id

*/

public int getId() {

return id;

}

/**

* @param id the id to set

*/

public void setId(int id) {

this.id = id;

}

@Column(name="sname", length=100,nullable=false)

private String sname;

/**

* @return the sname

*/

public String getSname() {

return sname;

}

/**

* @param sname the sname to set

*/

public void setSname(String sname) {

this.sname = sname;

}

@Column(name="sroll",nullable=false)

private int sroll;

/**

* @return the sroll

*/

public int getSroll() {

return sroll;

}

/**

* @param sroll the sroll to set

*/

public void setSroll(int sroll) {

this.sroll = sroll;

}

@Column(name="scourse",length=10,nullable=false)

private String scourse;

/**

* @return the scourse

*/

public String getScourse() {

return scourse;

}

/**

* @param scourse the scourse to set

*/

public void setScourse(String scourse) {

this.scourse = scourse;

}

}
JPACreate.java

/**
*
*/
package roseindia;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

import roseindia.Student;

/**
* @author Administrator
*
*/
public class JPACreate {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub


EntityManagerFactory emf = Persistence.createEntityManagerFactory("jpa");
EntityManager em = emf.createEntityManager();
try{
em.getTransaction().begin();
Student st = new Student();
st.setSname("Vinod Kumar");
st.setSroll(25);
st.setScourse("MBBS");
em.persist(st);
em.getTransaction().commit();
}
catch(Exception e){
System.out.println(e.getMessage());
}
finally{
em.close();
}

}

}




Persistence.xml

<?xml version="1.0" encoding="UTF-8"?>

<persistence>

<persistence-unit name="jpa">

<provider>org.hibernate.ejb.HibernatePersistence</provider>

<class>Student</class>

<properties>

<property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/jpacrud"/>

<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>

<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>

<property name="hibernate.connection.password" value="root"/>

<property name="hibernate.connection.username" value="root"/>

<property name="hibernate.hbm2ddl.auto" value="update"/>

<property name="hibernate.show_sql" value="true"/>

<property name="hibernate.max_fetch_depth" value="3"></property>

<!--

<property name="hibernate.format_sql" value="true"/>

-->

</properties>

</persistence-unit>

</persistence>


Can anyone suggest a solution for this problem.