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

Question

我在 eclipse 控制台上遇到以下异常

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

我的hibernate.cfg.xml是这样的：

<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.javaclass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();
    }
}

如有任何建议或帮助，我们将不胜感激。

编辑：我的 User.java 是这样的

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

我的User.hbm.xml是这样的

<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

问题显然与配置代码有关。您创建了 Configuration 两次。

就这样

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

我知道，它在 Hibernate 4 中已被弃用。但对于 Hibernate 5，这是一个好方法。这种 Hibernate 4 方法不适用于 Hibernate 5。

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

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

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

java

hibernate

hibernate-mapping

hibernate-4.x