错误/异常:org.hibernate.MappingException: Unknown entity: com.shore.entity.Student 的解决方法

1、错误/异常图  

 

   错误/异常描述:Hibernate配置文件 映射异常,不明实体类Student(org.hibernate.MappingException: Unknown entity: com.shore.entity.Student)

 

我原先的Hibernate配置文件:hibernate.cfg.xml

 1 <?xml version='1.0' encoding='utf-8'?>
 2 <!DOCTYPE hibernate-configuration PUBLIC
 3         "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
 4         "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
 5 
 6 <hibernate-configuration>
 7     <session-factory>
 8         <!-- Database connection settings -->
 9         <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
10         <property name="connection.url">jdbc:mysql://localhost:3306/school</property>
11         <property name="connection.username">root</property>
12         <property name="connection.password">root</property>
13 
14         <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
15         <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
16         <property name="show_sql">true</property>
17         <property name="hbm2ddl.auto">create</property>
18 
19         <!-- <mapping resource="com/shore/entity/Student.hbm.xml"/> -->
20     </session-factory>
21 </hibernate-configuration>

因为我用的是注解的方式,故没有xxx.hbm.xml配置文件,所以上面我注释掉了<!-- <mapping resource="com/shore/entity/Student.hbm.xml"/> -->  ,却忘记引入Student实体类。

2、解决方法  

在Hibernate的配置文件里加上一句:<mapping class="com.shore.entity.Student" />  就解决了。

 1 <?xml version='1.0' encoding='utf-8'?>
 2 <!DOCTYPE hibernate-configuration PUBLIC
 3         "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
 4         "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
 5 
 6 <hibernate-configuration>
 7     <session-factory>
 8         <!-- Database connection settings -->
 9         <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
10         <property name="connection.url">jdbc:mysql://localhost:3306/school</property>
11         <property name="connection.username">root</property>
12         <property name="connection.password">root</property>
13 
14         <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
15         <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
16         <property name="show_sql">true</property>
17         <property name="hbm2ddl.auto">create</property>
18 
19         <!-- <mapping resource="com/shore/entity/Student.hbm.xml"/> -->
20         <mapping class="com.shore.entity.Student" />
21     </session-factory>
22 </hibernate-configuration>

 

 

 

 

 

原创作者:DSHORE

作者主页:http://www.cnblogs.com/dshore123/

原文出自:https://www.cnblogs.com/dshore123/p/11528837.html

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posted @ 2019-09-16 18:20  DSHORE  阅读(3517)  评论(0编辑  收藏  举报