org.hibernate.MappingException: could not instantiate id generator

原创

我是张三丰 2023-04-25 01:16:31 博主文章分类：Hibernate ©著作权

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在搭建Hibernate的环境时,配置XXXX.hbm.xml有一段代码,配置错误,导致如下异常:

<class name="pack.java.model.Resource"  table="RESOURCE" schema="ROOT">
		<id name="id" column="ID" type="java.lang.Integer">
			<generator class="assgned">
			</generator>
		</id>
		<property name="key" column="KEY" type="java.lang.String" not-null="true"></property>
		<property name="remark" column="REMARK" type="java.lang.String" not-null="true"></property>
	</class>
 
 
<id name="id" column="ID" type="java.lang.Integer">
              <generator class="assgned"></generator>

手动指派id, 我写错误了, 应该是assigned 而不是assgned. 改正后,即可..

手动写配置文件时,一定要注意单词的拼写..别在像我放这样的低级错误l.

错误信息：

%%%% Error Creating SessionFactory %%%%
org.hibernate.MappingException: could not instantiate id generator
 at org.hibernate.id.IdentifierGeneratorFactory.create(IdentifierGeneratorFactory.java:98)
 at org.hibernate.mapping.SimpleValue.createIdentifierGenerator(SimpleValue.java:152)
 at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:192)
 at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1294)
 at pack.java.hibernate.HibernateSessionFactory.<clinit>(HibernateSessionFactory.java:30)
 at pack.java.dao.AbstractDao.getSession(AbstractDao.java:25)
 at pack.java.dao.AbstractDao.add(AbstractDao.java:35)
 at pack.java.dao.ResourceDaoImpl.addResource(ResourceDaoImpl.java:13)
 at pack.java.dao.ResourceDaoImpl.main(ResourceDaoImpl.java:45)
Caused by: org.hibernate.MappingException: could not interpret id generator strategy: assned
 at org.hibernate.id.IdentifierGeneratorFactory.getIdentifierGeneratorClass(IdentifierGeneratorFactory.java:109)
 at org.hibernate.id.IdentifierGeneratorFactory.create(IdentifierGeneratorFactory.java:92)
 ... 8 more
%%%% Error Creating SessionFactory %%%%
org.hibernate.InvalidMappingException: Could not parse mapping document from resource pack/java/model/Resource.hbm.xml
 at org.hibernate.cfg.Configuration.addResource(Configuration.java:569)
 at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1587)
 at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1555)