线程“main”中的异常org.hibernate.MappingException：未知实体：bitronix.examples.hibernate.entities.User

Question

我在eclipse控制台上遇到异常

Exception in thread "main" org.hibernate.MappingException: Unknown entity: bitronix.examples.hibernate.entities.User

我的 hibernate.cfg.xml 就像：

<hibernate-configuration>
    <session-factory>
        <property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
        <property name="hibernate.connection.password">postgres</property>
        <property name="hibernate.connection.url">jdbc:postgresql://localhost:5432/bitronixH4</property>
        <property name="hibernate.connection.username">postgres</property>
        <property name="hibernate.connection.dialect">org.hibernate.dialect.PostgreSQLDialect</property>
        <property name="hibernate.hbm2ddl.auto">create</property>
        <mapping resource="bitronix/examples/hibernate/entities/User.hbm.xml" />
    </session-factory>
</hibernate-configuration>

我的 Test.java 类就像

package bitronix.examples.hibernate.entities;

public class Test {
    public static void main(String[] args) {
        Configuration configuration = new Configuration();
        configuration.configure("hibernate.cfg.xml");
        ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
                .applySettings(configuration.getProperties()).build();
        SessionFactory sf1 = new Configuration()
                .buildSessionFactory(serviceRegistry);
        Session session = sf1.openSession();
        session.beginTransaction();
        User user = new User();
        user.setName("rrr");
        session.save(user);
        session.getTransaction().commit();
    }
}

感谢任何建议或帮助。

编辑：我的User.java就像这样

public class User {
private Integer id;
private String name;
//getters and setters
}

我的User.hbm.xml就像这样

<hibernate-mapping >
    <class name="bitronix.examples.hibernate.entities.User" table="test_user" >
        <id name="id" type="int">
            <column name="id" />
            <generator class="identity" />
        </id>
        <property name="name" type="string">
            <column name="name" />
        </property>
    </class>
</hibernate-mapping>

Answer 1

显然，问题在于配置代码。您创建了Configuration两次。

只做

SessionFactory sf1 = new Configuration().configure().buildSessionFactory();

我知道，它在Hibernate 4中已被弃用。但对于Hibernate 5来说，这是一个很好的方法。这种Hibernate 4方法不适用于Hibernate 5。

Hibernate 5 :- org.hibernate.MappingException: Unknown entity