Hibernate中的错误简单示例初学者级别 [英] Error in Hibernate simple example Beginner level
问题描述
无法创建sessionFactory object.java.lang.NoClassDefFoundError：
javax / transaction / SystemException线程main中的异常
java.lang.ExceptionInInitializerError导致：
java.lang.NoClassDefFoundError：javax / transaction / SystemException at
java.lang.Class.forName0（本地方法）
java.lang.Class.forName（未知源）
org.jboss.logging.Logger.getMessageLogger（Logger.java:2248）at
org.jboss.logging （Logger.java:2214）在
org.hibernate.cfg.Configuration。（Configuration.java:184）at
com.example.ManageEmployee.main（ManageEmployee.java:17）
基本上，我先写POJO，然后用eclipse生成hbm.xml。之后，我写了主要功能来管理数据库。我试了两次，但得到同样的问题。
有人可以给我建议来解决这个问题吗？在此之前，使用JDBC构建一个项目，但这太复杂了。所以我需要学习hibernate。谢谢。
补充（在这个hibernate示例项目中的详细信息）：
- 我的Eclipse项目名称： HibernateExa
-
hibernate.cfg.xml ：
< session-factory>
<！ - hibernate dialect - >
< property name =hibernate.connection.driver_class> com.mysql.jdbc.Driver< / property>
< property name =hibernate.connection.password> hibernateTest< / property>
< property name =hibernate.connection.url> jdbc：mysql：// localhost：3306 / hibernatetest;< / property>
< property name =hibernate.connection.username> hibernater< / property>
< property name =hibernate.default_schema> hibernatetest< / property>
< property name =hibernate.dialect> org.hibernate.dialect.MySQLDialect< / property>
<！ - 自动模式创建（开始） - >
< property name =hibernate.hbm2ddl.auto>建立< / property>
<！ - 简单内存缓存 - >
< property name =hibernate.cache.provider_class> org.hibernate.cache.HashtableCacheProvider< / property>
<！ - 启用Hibernate的自动会话上下文管理 - >
< property name =current_session_context_class>线程< / property>
<！ - 映射具有外部依赖关系的文件 - >
< mapping resource =com / sample / Person.hbm.xml/>
< / session-factory>
-
我的POJO的 Person.java 即可。使用eclipse生成 Person.hbm.xml 。
-
项目包含主要功能：TestPerson.java
public static void main（String [] args）{
Session session = SessionFactoryUtil.getSessionFactory（） .getCurrentSession（）;
session.beginTransaction（）;
createPerson（session）;
queryPerson（session）;
$ b $ public static void createPerson（Session session）{
Person person = new Person（）;
person.setName（Jack）;
person.setSurname（Yu）;
person.setAddress（白宫）;
session.save（person）;
private static void queryPerson（Session session）{
Query query = session.createQuery（from person）;
列表< Person> list = new ArrayList< Person>（）;
list = query.list（）;
java.util.Iterator< Person> iter = list.iterator（）; （iter.hasNext（））{
Person person = iter.next（）;
System.out.println（Person：\+ person.getName（）+\，+ person.getSurname（）+\，
+ person。 getAddress（））;
}
session.getTransaction（）。commit（）;
}
-
以下是错误信息：
$ b 初始SessionFactory创建失败java.lang.NoClassDefFoundError：javax / persistence / EntityListeners
线程main中的异常java.lang.ExceptionInInitializerError $ b $ com com.sample.SessionFactoryUtil。（SessionFactoryUtil.java:17）
at com.sample.TestPerson.main（TestPerson.java ：14）
由java.lang.NoClassDefFoundError引发：javax / persistence / EntityListeners $ b $在org.hibernate.cfg.annotations.reflection.JPAMetadataProvider.getDefaults（JPAMetadataProvider.java:97）
at org.hibernate.annotations.common.reflection.java.JavaReflectionManager.getDefaults（JavaReflectionManager.java:226）
at org.hibernate.cfg.Configuration.secondPassCompile（Con在org.hibernate.cfg.Configuration.buildSessionFactory（Configuration.java:1840）中
在org.hibernate.cfg.Configuration.buildSessionFactory（Configuration.java:1756）
$ b $ $ b at com.sample.SessionFactoryUtil。（SessionFactoryUtil.java:13）
... 1 more
导致：java.lang.ClassNotFoundException：javax.persistence.EntityListeners $ b $在java。 net.URLClassLoader $ 1.run（未知源）
在java.net.URLClassLoader $ 1.run（未知源）$ b $在java.security.AccessController.doPrivileged（本地方法）$ b $在java。 net.URLClassLoader.findClass（未知源）$ b $在java.lang.ClassLoader.loadClass（未知源）
在sun.misc.Launcher $ AppClassLoader.loadClass（未知源）
在java。 lang.ClassLoader.loadClass（Unknown Source）
... 7 more
基本上，这个例子可以帮助我练习如何使用hibernate。不过，我在开始创建项目时遇到了问题。
希望我能很快解决这个问题。请给点建议，谢谢。
请确保你的lib文件夹中包含所有这些jar文件： lib / antlr.jar
lib / cglib.jar
lib / asm.jar
lib / commons-collections.jar
lib / commons-logging.jar
lib / jta.jar
lib / dom4j.jar
lib / log4j.jar
lib / hibernate3 .jar
In order to learn hibernate, I write two examples for practising. However, both of them have same error as following:
Failed to create sessionFactory object.java.lang.NoClassDefFoundError: javax/transaction/SystemException Exception in thread "main" java.lang.ExceptionInInitializerError Caused by: java.lang.NoClassDefFoundError: javax/transaction/SystemException at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Unknown Source) at org.jboss.logging.Logger.getMessageLogger(Logger.java:2248) at org.jboss.logging.Logger.getMessageLogger(Logger.java:2214) at org.hibernate.cfg.Configuration.(Configuration.java:184) at com.example.ManageEmployee.main(ManageEmployee.java:17)
Basically, I write POJO first, and using eclipse generates hbm.xml. After than, I write main function to manage the database. I tried twice but got same problem.
Could someone give me advice to solve this problem? Before that, using JDBC builds a project, but that is too complex. So I need to learn hibernate. Thank you.
Supplement(detail in this hibernate example project):
- My Eclipse project Name: HibernateExa
hibernate.cfg.xml:
<session-factory> <!-- hibernate dialect --> <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> <property name="hibernate.connection.password">hibernateTest</property> <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernatetest;</property> <property name="hibernate.connection.username">hibernater</property> <property name="hibernate.default_schema">hibernatetest</property> <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> <!-- Automatic schema creation(begin) --> <property name="hibernate.hbm2ddl.auto">create</property> <!-- Simple memory-only cache --> <property name="hibernate.cache.provider_class">org.hibernate.cache.HashtableCacheProvider</property> <!-- Enable Hibernate's automatic session context management --> <property name="current_session_context_class">thread</property> <!-- mapping files with external dependencies --> <mapping resource="com/sample/Person.hbm.xml"/> </session-factory>My POJO is Person.java. Using eclipse generates Person.hbm.xml.
Project contains main function: TestPerson.java
public static void main(String [] args){
Session session = SessionFactoryUtil.getSessionFactory().getCurrentSession(); session.beginTransaction(); createPerson(session); queryPerson(session); } public static void createPerson(Session session){ Person person = new Person(); person.setName("Jack"); person.setSurname("Yu"); person.setAddress("White House"); session.save(person); } private static void queryPerson(Session session){ Query query = session.createQuery("from person"); List<Person> list = new ArrayList<Person>(); list = query.list(); java.util.Iterator<Person> iter = list.iterator(); while(iter.hasNext()){ Person person = iter.next(); System.out.println("Person: \"" + person.getName() + "\", "+ person.getSurname() + "\", " + person.getAddress()); } session.getTransaction().commit(); }Here is error info:
Initial SessionFactory creation failed. java.lang.NoClassDefFoundError: javax/persistence/EntityListeners Exception in thread "main" java.lang.ExceptionInInitializerError at com.sample.SessionFactoryUtil.(SessionFactoryUtil.java:17) at com.sample.TestPerson.main(TestPerson.java:14) Caused by: java.lang.NoClassDefFoundError: javax/persistence/EntityListeners at org.hibernate.cfg.annotations.reflection.JPAMetadataProvider.getDefaults(JPAMetadataProvider.java:97) at org.hibernate.annotations.common.reflection.java.JavaReflectionManager.getDefaults(JavaReflectionManager.java:226) at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1331) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1756) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1840) at com.sample.SessionFactoryUtil.(SessionFactoryUtil.java:13) ... 1 more Caused by: java.lang.ClassNotFoundException: javax.persistence.EntityListeners at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 7 more
Basically, this example could help me to practise how to using hibernate. Nevertheless, I got problem at the very beginning that create the project.
Hopefully, I could solve this problem soon. Please some advice, Thank you.
Please make sure you have all of this jar files in your lib folder:
lib/antlr.jar
lib/cglib.jar
lib/asm.jar
lib/commons-collections.jar
lib/commons-logging.jar
lib/jta.jar
lib/dom4j.jar
lib/log4j.jar
lib/hibernate3.jar
这篇关于Hibernate中的错误简单示例初学者级别的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
