我有以下代码:JPA - 执行更新
package testingjpa;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.Query;
public class Main
{
public static void main(String[] args)
{
EntityManagerFactory emFactory = Persistence.createEntityManagerFactory("TestingJPAPU");
EntityManager em = emFactory.createEntityManager();
Query query = em.createQuery("UPDATE Passengers p SET p.name = 'Robert' WHERE p.id = 2");
query.executeUpdate();
em.close();
}
}
这段代码的问题是,它抛出一个TransactionRequiredException。实体类工作正常,因为我尝试过使用其他代码并且工作完美。我该如何解决这个问题?
非常感谢:)它工作:) – robert
这在EJB容器之外工作? –