Unknown entity: My.heb.Student 解决方案
2016-12-21 14:04
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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[color=red]<mapping resource="My/heb/Student.hbm.xml"/>[/color]
<!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[color=red] package="My.heb"[/color]>
<?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>
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