Unknown entity: My.heb.Student 解决方案

org.hibernate.MappingException: Unknown entity: My.heb.Student
	at org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:628)
	at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1366)
	at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:121)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
	at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
	at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
	at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:563)
	at org.hibernate.impl.SessionImpl.save(SessionImpl.java:551)
	at org.hibernate.impl.SessionImpl.save(SessionImpl.java:547)
	at My.heb.StudentTest.main(StudentTest.java:30)

解决方案：hibernate.cfg.xml 文件 追加<mapping resource="My/heb/Student.hbm.xml"/>

<!DOCTYPE hibernate-configuration PUBLIC
 "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
 "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
	<session-factory>
		<!--程序执行的时候是否显示真正的sql语句 -->
		<property name="show_sql">true</property>
		<!--使用的SQL对应的“方言”，此处是Oracle9的“方言” -->
		<property name="dialect">org.hibernate.dialect.Oracle10gDialect
		</property>
		<!--连接数据库的Driver -->
		<property name="connection.driver_class">
			oracle.jdbc.driver.OracleDriver
		</property>
		<!--数据库连接url -->
		<property name="connection.url">
			jdbc:oracle:thin:@192.14.13.190:1521:dvlcn
		</property>
		<!--用户名 -->
		<property name="connection.username">AP07</property>
		<!--密码 -->
		<property name="connection.password">AP07</property>
<!-- 		<mapping resource="My/heb/Student.hbm.xml"/> -->
	</session-factory>
</hibernate-configuration>

并且Student.hbm.xml 文件追加相应的包<hibernate-mapping package="My.heb">

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping
     PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
     "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="My.heb">
	<!-- <property name="packagesToScan" value="My.heb" /> -->
	<class name="My.heb.Student" table="Student">
		<id name="student_id" column="student_id" type="java.lang.Integer">
			<generator class="native">
				<param name="sequence">student_sequence</param>
			</generator>
		</id>
		<property name="student_name" column="Student_Name" type="java.lang.String" />
		<property name="student_age" column="Student_Age" type="java.lang.Integer" />
	</class>
</hibernate-mapping>