Hibernate出现错误···。头疼·

Question

hibernate.cfg.xml文件如下
<?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"><!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>
<session-factory>


    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.username">root</property>
<property name="connection.password">123</property>
<property name="connection.url">jdbc:mysql:///test</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="connection.password">123</property>
<property name="hbm2ddl.auto">create</property>


<mapping resource="cn/itcast/hibernatetest/User.hbm.xml"/>
</session-factory>
</hibernate-configuration>
出现的异常如下
Exception in thread "main" org.hibernate.MappingException: Unknown entity: cn.itcast.hibernatetest.User
at org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:550)
at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1338)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:98)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:535)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:519)
at cn.itcast.hibernatetest.Base.main(Base.java:27)找了很久不知道那里错了····  头晕啦·······
高手帮个忙··· 谢谢

Answer 1

<mapping resource="cn/itcast/hibernatetest/User.hbm.xml"/>
路径写错了吧，或者是你的文件名错了！

Answer 2

<property name="connection.url">jdbc:mysql:///test</property>

Answer 3

cn/itcast/hibernatetest/User.hbm.xml文件！

Answer 4

楼主你试试把所有的.class文件删除，再重新编译所有文件...

Answer 5

User.hbm.xml文件如下
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.itcast.hibernatetest"> <class name="User" table="user">
<id name="id">
<generator class="hilo" />
</id>
<version name="ver"/>
<!--  
<property name="name"/>
-->
<component name="name">
<property name="firstName" column="first_name"/>
<property name="lastName" column="last_name" />
</component>
<property name="birthday" />
<query name="getUserByBirthday1">
<![CDATA[from User where birthday=:birthday]]>
</query>
</class>

<query name="getUserByBirthday">
<![CDATA[from User where birthday=:birthday]]>
</query>
</hibernate-mapping>

Answer 6

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC  
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.itcast.hibernatetest"><class name="User" table="user">
<id name="id">
<generator class="hilo" />
</id>
<version name="ver"/>
<!--   
<property name="name"/>
-->
<component name="name">
<property name="firstName" column="first_name"/>
<property name="lastName" column="last_name" />
</component>
<property name="birthday" />
<query name="getUserByBirthday1">
<![CDATA[from User where birthday=:birthday]]>
</query>
</class><query name="getUserByBirthday">
<![CDATA[from User where birthday=:birthday]]>
</query>
</hibernate-mapping>

Answer 7

Exception in thread "main" org.hibernate.MappingException: Unknown entity: cn.itcast.hibernatetest.User
at org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:550)
at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1338)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:98)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:535)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:519)
at cn.itcast.hibernatetest.Base.main(Base.java:27)

Answer 8

<class name="User" table="user">
前面的User改一下路径

Answer 9

文件的位置有没有放错？itcast？你是传智播客的还是看他们那个教程做的？

Answer 10

cn.itcast.hibernatetest.User
检查下你的文件路径是否写错了