Hibernate在路上遇到的问题

1.
Exception in thread "main" java.lang.NoClassDefFoundError: javax/persistence/EntityListeners
at org.hibernate.cfg.annotations.reflection.JPAMetadataProvider.getDefaults(JPAMetadataProvider.java:96)
at org.hibernate.annotations.common.reflection.java.JavaReflectionManager.getDefaults(JavaReflectionManager.java:226)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1355)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1826)
at StudentTest.main(StudentTest.java:17)

原因：没有引入hibernate-distribution-3.6.0.Final\lib\jpa下面的hibernate-jpa-2.0-api-1.0.0.Final.jar

2.
Initial SessionFactory creation failed.java.lang.NoClassDefFoundError: com/mchange/v2/c3p0/DataSources

Exception in thread "main" java.lang.ExceptionInInitializerError
at com.mkyong.persistence.HibernateUtil.buildSessionFactory(HibernateUtil.java:19)
at com.mkyong.persistence.HibernateUtil.<clinit>(HibernateUtil.java:8)
at com.mkyong.common.App.main(App.java:11)
Caused by: java.lang.NoClassDefFoundError: com/mchange/v2/c3p0/DataSources
at org.hibernate.connection.C3P0ConnectionProvider.configure(C3P0ConnectionProvider.java:154)
at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:124)
at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:56)
at org.hibernate.cfg.SettingsFactory.createConnectionProvider(SettingsFactory.java:410)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:62)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2009)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1292)
at com.mkyong.persistence.HibernateUtil.buildSessionFactory(HibernateUtil.java:13)
... 2 more
Caused by: java.lang.ClassNotFoundException: com.mchange.v2.c3p0.DataSources
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
... 10 more
原因:
没有导入连接池包（c3p0-0.8.5.2.jar）

3.
Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer]
原因:
缺少 javassist.jar

4.
原文：http://hi.baidu.com/wdmd5211314/blog/item/8c71c639a29d4d3696ddd837.html
Hibernate java.lang.NoSuchFieldError: INSTANCE
在使用hibernate3.6.2是我遇到了一个有趣的错误java.lang.NoSuchFieldError: INSTANCEat org.hibernate.type.BasicTypeRegistry.<init>(BasicTypeRegistry.java:94)at org.hibernate.type.TypeResolver.<init>(TypeResolver.java:59)at org.hibernate.cfg.Configuration.<init>(Configuration.java:249)at org.hibernate.cfg.Configuration.<init>(Configuration.java:300)



在Google中弄到了答案：

I solved my problem.
I had to delete hibernate-annotations.jar, because I had it already in hibernate3.jar...

因为我引入了3.4GA 的annotation的jar包，将这些jar包删除了即可

注：好像是hibernate3.jar中已经包含了hibernate-annotations.jar。

5.原文：http://www.likestudy.org/339.html
Hibernate 3.6.1 配置文件dtd URL改变了
使用3.6.1时，无意中在日志里看到这么一句:WARN [org.hibernate.util.DTDEntityResolver] – recognized obsolete hibernate namespace http://hibernate.sourceforge.net/. Use namespace http://www.hibernate.org/dtd/ instead. Refer to Hibernate 3.6 Migration Guide!
查阅了3.6.1勇者文档发现配置文件的dtd URL改变了

以前的:

<?xml version='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">

新的:

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

改变的地方:
http://hibernate.sourceforge.net/修改为 http://www.hibernate.org/dtd/

hbm 配置文件一样，修改 dtd url就可以了