I got the following error while inserting a record in DB.Please help me about am new to JPA.

em.getTransaction().begin();/// i got exception at this line
em.persist(customer);
em.getTransaction().commit();

Exception Caught in Hibernate Util: java.lang.UnsupportedOperationException: The user must supply a JDBC connection

My persistence xml is ...

<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0">
<persistence-unit name="sample">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.sample.jpa.Customer</class>
<class>com.sample.jpa.Order</class>
<properties>
<property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="connection.url">jdbc:oracle:thin:@localhost:1521:XE</property>
<property name="hibernate.dialect">org.hibernate.dialect.OracleDialect</property>
<property name="hibernate.connection.username">scott</property>
<property name="hibernate.connection.password">tiger</property>
<property name="hibernate.show_sql">true</property>
</properties>
</persistence-unit>
</persistence>

use hibernate.connection.* instead of connection.*

Thx emmanual.Its working fine now :-)