我正在學習hibernate,我無法弄清楚爲什麼這個錯誤會彈出。我嘗試搜索,但我找不到幫助我的解決方案。我想知道爲什麼我得到這個錯誤。線程「主」異常org.hibernate.MappingException:未知實體:來自目的地
Exception in thread "main" org.hibernate.MappingException: Unknown entity: from Destination
這裏還有一些細節:
main():
public static void main(String[] args) {
Session session = HibernateUtil.getSessionFactory().openSession();
session.beginTransaction();
// Destination destination = new Destination();
// destination.setName("IDelhi");
// destination.setLatitude(1.0f);
// destination.setLongitude(123.0f);
// session.save(destination);
List result = session.createCriteria("from Destination").list();
session.getTransaction().commit();
session.close();
// for (Object dest : result) {
// Destination d = (Destination)dest;
// System.out.println(d.getId() + ": "+ d.getName());
// }
}
}
當我嘗試插入目標(註釋代碼),值被插入到數據庫。
配置:
的hibernate.cfg.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory name="">
<property name="hibernate.connection.driver_class">org.gjt.mm.mysql.Driver</property>
<property name="hibernate.connection.password">*****</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/</property>
<property name="hibernate.connection.username">*****</property>
<property name="hibernate.default_schema">wah_schema</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- Enable Hibernate's automatic session context management -->
<property name="current_session_context_class">thread</property>
<mapping class="org.wah.dao.Destination" resource="org/wah/dao/Destination.hbm.xml"/>
</session-factory>
</hibernate-configuration>
Destination.hbm.xml:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Jan 25, 2012 3:31:00 PM by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="org.wah.dao.Destination" table="DESTINATION">
<id name="id" type="int">
<column name="ID"/>
<generator class="identity"/>
</id>
<property generated="never" lazy="false" name="name" type="java.lang.String">
<column name="NAME"/>
</property>
<property generated="never" lazy="false" name="latitude" type="float">
<column name="LATITUDE"/>
</property>
<property generated="never" lazy="false" name="longitude" type="float">
<column name="LONGITUDE"/>
</property>
</class>
</hibernate-mapping>
有人可以幫我想出解決辦法?
請參閱我上面發佈的代碼。我正在使用您提到的與HQL相同的內容。任何原因爲什麼不起作用? – brainydexter
@brainydexter - 你的HQL很好,但你應該使用「createQuery」方法而不是「createCriteria」 –
謝謝你指出!我忽略了這一點。 – brainydexter