Hibernate错误

[javazhangjin]

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
org.hibernate.MappingException: Unknown entity: java.lang.Integer
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 com.persistence.BaseDAO.saveObj(BaseDAO.java:18)
at com.BusinessManager.BM.main(BM.java:24)
实现是表的一对一的插入
配置文件
<hibernate-mapping>

<class name="com.test.Student" table="student" lazy="true">

<id name="id" unsaved-value="null">
<generator class="uuid.hex"> <!-- 主键id的生成方式为uuid.hex-->
</generator>
</id>
<property name="cardId" type="string"></property>
<property name="name" type="string"></property>
<property name="age" type="integer"></property>

<one-to-one name="cer" class="com.test.Certificate" fetch="join" cascade="all"></one-to-one>
</class>

</hibernate-mapping>

<hibernate-mapping>

<class name="com.test.Certificate" table="certificate" lazy="true">

<id name="id">
<generator class="foreign"> <!-- 将对方的主键变成我的主键 -->
<param name="property">stu</param>
</generator>
</id>

<property name="describe" column="`describe`" type="string"></property>

<one-to-one name="stu" class="com.test.Student"
constrained="true" cascade="none"></one-to-one>
</class>

</hibernate-mapping>

[24K純帥]

怎么报的错是log4j没配置好啊

[完美灬缺陷]

org.hibernate.MappingException: Unknown entity: java.lang.Integer

配置文件里的字段type属性配错了吧、把配置贴出来看看。

[完美灬缺陷]

不是、是把插入数据的代码贴出来看看、