关于在J2SE里使用JPA的问题

a123456789987654321 2008-11-17 03:08:09



@Entity

@Table(name="fl")

public class FL {

        

        @Id

        private Integer id;

        @Column(name="name")

        private String name;

        @Column(name="jb")

        private Integer jb;        

        

        public FL(){                

        }



        public Integer getId() {

                return id;

        }



        public void setId(Integer id) {

                this.id = id;

        }



        public Integer getJb() {

                return jb;

        }



        public void setJb(Integer jb) {

                this.jb = jb;

        }



        public String getName() {

                return name;

        }



        public void setName(String name) {

                this.name = name;

        }



}



 public static void main(String[] argv){

                FL f = new FL();

                f.setJb(1);

                f.setName("浙江地区");

                EntityManagerFactory emf = Persistence.createEntityManagerFactory("mypu");                

                EntityManager em = emf.createEntityManager();

                em.persist(f);

                em.close();

                emf.close();

        }



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

<persistence version="1.0" 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">

  <persistence-unit name="mypu" transaction-type="RESOURCE_LOCAL">

    <provider>oracle.toplink.essentials.PersistenceProvider</provider>

    <class>FL</class>

    <properties>

      <property name="toplink.jdbc.user" value="root"/>

      <property name="toplink.jdbc.password" value="123456"/>

      <property name="toplink.jdbc.url" value="jdbc:mysql://127.0.0.1:3306/testdb"/>

      <property name="toplink.jdbc.driver" value="com.mysql.jdbc.Driver"/>

    </properties>

  </persistence-unit>

</persistence>

Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named mypu: The following providers:
oracle.toplink.essentials.PersistenceProvider
oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider
Returned null to createEntityManagerFactory.

at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:154)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
at test.main(test.java:21)
Java Result: 1

总是这样报错，郁闷死了

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