Exception of "Initial SessionFactory creation failed..."

[Thomas Qi]

hibernate v3.2
Mysql v5.0
Eclispe v3.2

when I run an application based on the demo of "Hibernate 3.2", I met
some exceptions below:

09:46:49,818 INFO Environment:500 - Hibernate 3.2.0
Initial SessionFactory creation
failed.java.lang.ExceptionInInitializerError
Exception in thread "main" java.lang.ExceptionInInitializerError
at util.HibernateUtil.<clinit>(HibernateUtil.java:18)
at messages.MessageManager.listMessages(MessageManager.java:48)
at messages.MessageManager.main(MessageManager.java:16)
Caused by: java.lang.ExceptionInInitializerError
at org.hibernate.cfg.Configuration.reset(Configuration.java:168)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:187)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:191)
at util.HibernateUtil.<clinit>(HibernateUtil.java:13)
.... 2 more
Caused by: java.lang.NullPointerException
at
org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:144)
at org.hibernate.cfg.Environment.<clinit>(Environment.java:515)
.... 6 more

these are the codes:
1. sql script
drop database if exists SAMPLEDB;
create database SAMPLEDB;
use SAMPLEDB;

create table messages (
Message_ID bigint not null primary key,
Message_TITLE varchar(15) not null,
Message_CONTENT varchar(128) not null,
Message_DATE timestamp
);


2. src/hibernate.cfg.xml
<?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">

<hibernate-configuration>

<session-factory>

<!-- Database connection settings -->
<property
name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property
name="connection.url">jdbc:mysql://localhost:3306/sampledb</property>
<property name="connection.username">root</property>
<property name="connection.password">123456</property>

<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>

<!-- SQL dialect -->
<property
name="dialect">org.hibernate.dialect.MySQLDialect</property>

<!-- Enable Hibernate's automatic session context management -->
<property name="current_session_context_class">thread</property>

<!-- Disable the second-level cache -->
<property name="cache.provider_class">
org.hibernate.cache.NoCacheProvider
</property>

<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>

<!-- Drop and re-create the database schema on startup -->
<property name="hbm2ddl.auto">create</property>

<mapping resource="messages/Message.hbm.xml" />

</session-factory>

</hibernate-configuration>


3. src/log4j.properties
### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p
%c{1}:%L - %m%n

### direct messages to file hibernate.log ###
#log4j.appender.file=org.apache.log4j.FileAppender
#log4j.appender.file.File=hibernate.log
#log4j.appender.file.layout=org.apache.log4j.PatternLayout
#log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L
- %m%n

### set log levels - for more verbose logging change 'info' to 'debug'
###

log4j.rootLogger=warn, stdout

log4j.logger.org.hibernate=info
#log4j.logger.org.hibernate=debug

### log HQL query parser activity
#log4j.logger.org.hibernate.hql.ast.AST=debug

### log just the SQL
#log4j.logger.org.hibernate.SQL=debug

### log JDBC bind parameters ###
log4j.logger.org.hibernate.type=info
#log4j.logger.org.hibernate.type=debug

### log schema export/update ###
log4j.logger.org.hibernate.tool.hbm2ddl=debug

### log HQL parse trees
#log4j.logger.org.hibernate.hql=debug

### log cache activity ###
#log4j.logger.org.hibernate.cache=debug

### log transaction activity
#log4j.logger.org.hibernate.transaction=debug

### log JDBC resource acquisition
#log4j.logger.org.hibernate.jdbc=debug

### enable the following line if you want to track down connection ###
### leakages when using DriverManagerConnectionProvider ###
#log4j.logger.org.hibernate.connection.DriverManagerConnectionProvider=trace


4. src/util/HibernateUtil.java
package util;

import org.hibernate.*;
import org.hibernate.cfg.*;

public class HibernateUtil {

private static final SessionFactory sessionFactory;

static {
try {
// Create the SessionFactory from hibernate.cfg.xml
sessionFactory = new Configuration().configure()
.buildSessionFactory();
} catch (Throwable ex) {
// Make sure you log the exception, as it might be swallowed
System.err.println("Initial SessionFactory creation failed." +
ex);
throw new ExceptionInInitializerError(ex);
}
}

public static SessionFactory getSessionFactory() {
return sessionFactory;
}

}


5. src/messages/Message.java
package messages;

import java.util.*;

public class Message {
private Long id;

private String title;

private String content;

private Date date;

public Message() {
}

public Long getId() {
return id;
}

private void setId(Long id) {
this.id = id;
}

public Date getDate() {
return date;
}

public void setDate(Date date) {
this.date = date;
}

public String getTitle() {
return title;
}

public void setTitle(String title) {
this.title = title;
}

public String getContent() {
return content;
}

public void setContent(String content) {
this.content = content;
}
}


6. src/messages/Message.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>

<class name="messages.Message" table="messages">
<id name="id" type="long" column="message_ID">
<generator class="native" />
</id>
<property name="date" type="timestamp" column="message_DATE" />
<property name="title" type="string" column="message_TITLE" />
<property name="content" type="string" column="message_CONTENT"
/>
</class>

</hibernate-mapping>


7. src/messages/MessageManager.java
package messages;

import org.hibernate.*;
import java.util.*;

import util.HibernateUtil;

public class MessageManager {

public static void main(String[] args) {
MessageManager mgr = new MessageManager();

if (args[0].equals("store")) {
mgr.createAndStoreMessage("My Message", "My Content", new
Date());
} else if (args[0].equals("list")) {
List messages = mgr.listMessages();
for (int i = 0; i < messages.size(); i++) {
Message theMessage = (Message) messages.get(i);
System.out.println("Message: " + theMessage.getTitle()
+ " Content: " + theMessage.getContent() + " Time: "
+ theMessage.getDate());
}
}

HibernateUtil.getSessionFactory().close();
}

private Long createAndStoreMessage(String title, String content,
Date theDate) {

Session session =
HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();

Message theMessage = new Message();
theMessage.setTitle(title);
theMessage.setContent(content);
theMessage.setDate(theDate);

session.save(theMessage);

session.getTransaction().commit();

return theMessage.getId();
}

private List listMessages() {

Session session =
HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();

List result = session.createQuery("from Message").list();

session.getTransaction().commit();

return result;
}

}


I had added all .jar files of Hibernate/lib directory to the classpath.
it is so strange:
the codes run ok on NetBeans 5.5, but can't work on Eclipse 3.2.
who can tell me why?

thanks a lot!


Best Regards,

Thomas


ps: My MSN ID: (e-mail address removed).