I am trying to create a simple Hibernate application (the Message application from Hibernate in Action Book) using NotePad. My environment is Hibernate 2.1.4, MS SQL Server 2000 under Windows XP. The Hibernate is installed in C:\MyPrograms\hibernate folder and my CLASSPATH is set to ".;%JAVA_HOME%\lib\tools.jar;%HIBERNATE_HOME%\hibernate2.jar". The source code of the files are at the end.

I created a folder c:\Examples\HIA. There I created Message.java and Message.hbm.xml files. In MS SQLServer, I created a database and create a table MESSAGES in it. I then created an ODBC connection for that database. I then configure the hibernate.properties to connect to my database and put this file in C:\Examples\HIS folder. Now I compile the Message.java file at C:\Examples\HIS folder by typing "javac -d . Message.java" at command prompt. It creates the hello folder and put the Message.class file in it. So far good. Now I created another file TestMessage.java which saves a message to the database. I was able to compile it successfully by typing "javac TestMessage.java". When I try to run it by typing "java TestMessage.java", I got this error message :
Exception in thread "main" java.lang.NoClassDefFoundError: org/dom4j/Attribute at TestMessage.main(TestMessage.java:10)

I can see that this error message is happening because the %HIBERNATE_HOME%\lib has some jar files which needs to be included in the classpath. The problem is there are 33 of them and i dont want to include them manually in my CLASSPATH. Is there any way to solve this problem?

Thanks



Message.java
=========

package hello;

import java.io.Serializable;

public class Message implements Serializable {
private Long id;
private String text;
private Message nextMessage;

public Message() {}
public Message(String text) {
this.text = text;
}

public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public Message getNextMessage() {
return nextMessage;
}
public void setNextMessage(Message nextMessage) {
this.nextMessage = nextMessage;
}
}


Message.hbm.xml
============

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping>
<class name="hello.Message" table="MESSAGES">
<id
name="id"
column="MESSAGE_ID">
<generator class="increment"/>
</id>
<property
name="text"
column="MESSAGE_TEXT"/>
<many-to-one
name="nextMessage"
cascade="all"
column="NEXT_MESSAGE_ID"/>
</class>
</hibernate-mapping>


TestMessage.java
============
import hello.Message;
import net.sf.hibernate.cfg.Configuration;
import net.sf.hibernate.SessionFactory;
import net.sf.hibernate.Session;
import net.sf.hibernate.Transaction;

public class TestMessage {
public static void main(String[] args) throws Exception
{
Configuration cfg = new Configuration()
.addClass(hello.Message.class);

SessionFactory factory = cfg.buildSessionFactory();

Session session = factory.openSession();

Transaction tx = session.beginTransaction();

Message message = new Message("Hello World!");

session.save(message);

tx.commit();

session.close();
}
}

Read the docs that comes with the Java JDK... that's where you should look at - not at Hibernate.

Hint: java -h

thanks. I already solve it by building an ANT script. I will look at the JDK help too.

<?xml version="1.0" encoding="GB2312" ?>
<project name="bookexample" default="compilejavafiles" basedir=".">
<target name="init">
<property name="bookexamplehome" value="C:\Examples\HIA"/>
<path id="compile.classpath">
<fileset dir="${bookexamplehome}/lib">
<include name="*.jar"/>
</fileset>
</path>
</target>
<target name="compilejavafiles" description="Compile Java files" depends="init">
<javac srcdir="."
destdir=".">
<classpath refid="compile.classpath"/>
<include name="**/*.java"/>
</javac>
</target>
</project>