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错误1：MappingException: Unknown entity解决方案
http://jingyan.baidu.com/article/e75aca8552761b142edac6cf.html
错误2：Could not bind factory to JNDI
2006-07-23 23:14:53,796 [main] WARN org.hibernate.impl.SessionFactoryObjectFactory - Could not bind factory to JNDI javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:645) at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:247) at javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:284) at javax.naming.InitialContext.getNameParser(InitialContext.java:439) at org.hibernate.util.NamingHelper.bind(NamingHelper.java:52) at org.hibernate.impl.SessionFactoryObjectFactory.addInstance(SessionFactoryObjectFactory.java:90) at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:291) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1176) at reene.study.hibernate.test.TestMain.main(TestMain.java:19)
在网上找到如下内容：
（3）报错：Could not bind factory to JNDI
此错误是配置文件的问题，如果hibernate配置文件有session_factory_name这个变量，<session-factory name="foo"> 会试图将一个SessionFactory实例以foo为名bind到jndi上，而有的application container不支持jndi绑定。把这个变量去掉即可。
解决问题
把引用代码也要修改：
大致改成这样：
SessionFactory sf = new Configuration().configure().buildSessionFactory(); Session session = sf.openSession(); Transaction tx = session.beginTransaction();
错误3： entity class not found:
org.hibernate.MappingException: entity class not found: Customer at org.hibernate.mapping.PersistentClass.getMappedClass(PersistentClass.java:128) at org.hibernate.tuple.PropertyFactory.getGetter(PropertyFactory.java:390) at org.hibernate.tuple.PropertyFactory.buildIdentifierProperty(PropertyFactory.java:75) at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:145) at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:505) at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:144) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:526) at org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:163) at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:135) at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:386) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1744) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1782) at com.session.Test.main(Test.java:15) Caused by: java.lang.ClassNotFoundException: Customer at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:425) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:190) at org.hibernate.internal.util.ReflectHelper.classForName(ReflectHelper.java:192) at org.hibernate.mapping.PersistentClass.getMappedClass(PersistentClass.java:125) ... 15 more
修改Customer.hbm.xml
原来class name
<class name="Customer" table="CUSTOMER"> <id name="id" column="CID" type="java.lang.Integer"> <generator class="increment" /> </id> <property name="username" column="USERNAME" type="java.lang.String"/> <property name="password" column="PASSWORD" type="java.lang.String"/> </class>
修改为
<class name="com.session.Customer" table="CUSTOMER"> <id name="id" column="CID" type="java.lang.Integer"> <generator class="increment" /> </id> <property name="username" column="USERNAME" type="java.lang.String"/> <property name="password" column="PASSWORD" type="java.lang.String"/> </class>
错误4：Attribute "column" must be declared for element type "property"解决办法
自己写的xxx.hbm.xml文件 出现错误：
Attribute "column" must be declared for element type"property"
这个错误是因为自己把hibernate.cfg.xml的文件头直接复制到了xxx.hbm.xml（在这里为Customer.hbm.xml）中
hibernate.cfg.xml的文件头：
<?xmlversion=‘1.0‘ encoding=‘UTF-8‘?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
这个应该改为mapping的头文件就行了
Customer.hbm.xml的文件头
<?xmlversion="1.0" encoding="UTF-8"?> <!DOCTYPEhibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
然后在里面编写自己的映射就行了。
错误5：not found while looking for property错误
not found while looking for property错误
Caused by: org.hibernate.MappingException: com.session.Customer not found while looking for property: id
配置文件如下
<?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> <class name="com.session.Customer" table="CUSTOMER"> <id name="id" column="CID"> <generator class="increment" /> </id> <property name="username" column="USERNAME"/> <property name="password" column="PASSWORD"/> </class> </hibernate-mapping>
发现自己的配置好像没有问题。在网上搜索到了原因:链接
按照里面的方法把每个值都加上属性即可。修改如下：
<?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> <class name="com.session.Customer" table="CUSTOMER"> <id name="id" column="CID" type="java.lang.Integer"> <generator class="increment" /> </id> <property name="username" column="USERNAME" type="java.lang.String"/> <property name="password" column="PASSWORD" type="java.lang.String"/> </class> </hibernate-mapping>
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原文地址：http://www.cnblogs.com/gnivor/p/4325975.html
