No Persistence provider for EntityManager named... error
17,226
You will need to move the persistence.xml file to an appropriate location
From JPA spec:
A persistence.xml file defines a persistence unit. The persistence.xml file is located in the META-INF directory of the root of the persistence unit.
The root of the persistence unit is the key here.
If you are a non-Java EE app
The jar file or directory whose META-INF directory contains the persistence.xml file is termed the root of the persistence unit.
If you are in a Java EE app, the following are valid
In Java EE environments, the root of a persistence unit must be one of the following:
- an EJB-JAR file
- the WEB-INF/classes directory of a WAR file[80]
- a jar file in the WEB-INF/lib directory of a WAR file
- a jar file in the EAR library directory
- an application client jar file
Author by
ebruszl
Updated on June 04, 2022Comments
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ebruszl almost 2 years
My persistence xml file is like that
<?xml version="1.0" encoding="UTF-8"?> <persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0"> <persistence-unit name="hibernateEbru"> <provider>org.hibernate.ejb.HibernatePersistence</provider> <class>com.hibernate.business_card</class> <properties> <property name="hibernate.hbm2ddl.auto" value="create" /> <property name="hibernate.show_sql" value="true" /> <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" /> <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" /> <property name="hibernate.connection.username" value="root" /> <property name="hibernate.connection.password" value="2643" /> <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/BusinessDb" /> </properties> </persistence-unit> </persistence>
Then I have my code calling it with this:
public class test { public static void main(String[] args) { EntityManagerFactory emf = Persistence.createEntityManagerFactory("hibernateEbru"); EntityManager em = emf.createEntityManager(); em.getTransaction().begin(); business_card bc = new business_card(); bc.setName("Ebru"); em.persist(bc); em.getTransaction().commit(); em.close(); emf.close(); } }
I got the following error message:
Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named hibernateEbru at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:56) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:34) at com.hibernate.test.main(test.java:8)